This glossary lists common terms, acronyms, abbreviations, and measurements used in Australia’s energy industry. For rules terms, see the relevant industry rules on the AEMC website > Energy rules.

    1
  • 10% of the actual demand values are expected above. 90% of the actual demand values are expected below
  • 3
  • Term replacing Trading Interval, where the period remains 30 minutes
  • 5
  • Five minute resolution, one hour ahead.
  • Implies there is a 50% probability of the forecast being met or exceeded. Also known as Demand50
  • 5-minute Pre-dispatch
  • 9
  • 90% of the actual demand values are expected above. 10% of the actual demand values are expected below
  • A
  • Australian Bureau of Agricultural and Resource Economics and Sciences. The research arm of the Australian Government Department of Agriculture and Water Resources that provides professionally independent data, research, analysis and advice to inform public and private decisions affecting Australian agriculture, fisheries and forestry.
  • A process initiated by AEMO to complete in-progress Change Requests following a ROLR Event, allowing for: • Completion of Change Requests otherwise requiring the MDP to submit the Actual Change Date, where that date is not yet submitted. • Specification of an Actual Change Date (RoLR Effective Transfer Date) to supersede any existing Proposed Change Date or Actual Change Date on the Change Request.
  • A Recipient of a B2B Message has agreed to process it further.
  • Specific site access requirements associated with the conduct of a Service Order. See B2B Procedures: Customer & Site Details Notification Process and B2B Procedures: Service Orders Process.
  • Any person (non-NSP) holding an account with AEMO that allows access to the DER Register. This may be a DER installer or someone acting on behalf of a DER installer.
  • The full process to become accredited as a B2B e-Hub Participant from application form to application successful.
  • The questions an applicant for MDP, MP, or ENM completes for accreditation.
  • Electrically qualified personnel accredited to perform certain electrical works by the NSW or ACT Government.
  • A device complying with Australian Standards, containing a measurement element(s) and a record of the accumulated quantity of the electricity flowing through the power conductor. Also know as a basic meter.
  • An acknowledgement file from AEMO with a filename extension of .ACK. The file contains messages to acknowledge the success of another file.
  • A file containing a Message Acknowledgement. See B2B Procedures: Technical Delivery Specification.
  • Australian Communications and Media Authority
  • The effective date of changes specified in a Change Request. The same date as the FromDate in a C4 Report and the Start Date in MSATS interfaces displaying NMI master data.
  • A date specifying the end of a period when updating existing data in CATS. It is only specified in a Change Request for a Retrospective Change correcting a past error.
  • The date an actual meter reading is obtained.
  • The accumulated metering data or interval metering data collected from a meter either manually or by remote acquisition (as applicable).
  • Accumulated metering data or interval metering data that has passed Validation without Substitution.
  • Aggregate Dispatch Error
  • Average Daily Load; the electrical energy delivered through a metering point’s data streams over an extended period, normalised to a “per day” basis.
  • Average Daily Load; the electrical energy delivered through a metering point’s data streams over an extended period, normalised to a “per day” basis.
  • Australian Energy Market Operator
  • An email from AEMO to a distribution list of Registered Participant contacts broadcasting NEM-related information.
  • The entities and rights assigned to participants to maintain access rights to different parts of the system.
  • Creates the initial participant administrator ID with the PA right assigned, for each organisation.
  • Advanced Encryption Standard
  • Australian Eastern Standard Time
  • Automatic Generation Control. A process that detects minor deviations in power system frequency and sends raise or lower signals to generating units providing regulation.
  • Adjusted Gross Energy. The amount of energy to be adjusted for a trading interval.
  • Specifies the type of reallocation transaction where a reallocation can have one of two different agreement types—A fixed dollar amount ($) or a fixed quantity amount (GJ).
  • Advanced Metering Infrastructure. An integrated system of meters, communications networks, and data management systems that enables two-way communication between providers and customers.
  • International consortium responsible for design and supply of AWEFS/ASEFS. AWEFS/ASEFS is also commonly referred to as ANEMOS.
  • Annual National Transmission Statement. A document outlining AEMO’s vision for national transmission planning.
  • Application Programming Interface; a set of clearly defined methods of communication between various software components.
  • Provides B2B communication options using web services or using direct connections from a compatible participant gateway. Accessible over the internet or MarketNet.
  • A B2B e-Hub delivery method.
  • Australia Pacific LNG. Australia’s largest producer of natural gas sourced from coal seams in eastern Australia.
  • An agreement between the retail customer (or their agent), Service Provider and Retailer to perform requested work at a specific time. See B2B Procedures: Service Orders Process.
  • A version of the aseXML schema approved by the aseXML Working Group, or its successors. Refer B2B Procedures: Technical Delivery Specification.
  • Annual Planning Report. Reports from transmission planning businesses, outlining potential future needs for network replacement or augmentation in the NEM.
  • Australian Renewable Energy Agency. An agency established by the Australian government in 2012 to improve the competitiveness of renewable energy technologies and increase the supply of renewable energy in Australia.
  • Electricity supplied to the grid by scheduled, semi-scheduled, and significant non-scheduled generators, including their auxiliary loads, and electricity used by a generator
  • Australian Solar Energy Forecasting System. Designed to produce solar generation forecasts for large solar power stations and small-scale distributed photovoltaic (PV) systems, covering forecasting timeframes from 5 minutes to 2 years.
  • Australian Solar Energy Forecasting System. Designed to produce solar generation forecasts for large solar power stations and small-scale distributed photovoltaic (PV) systems, covering forecasting timeframes from 5 minutes to 2 years.
  • A standard for energy transactions in XML. A set of schemas and usage guidelines that define how data should be exchanged under FRC in the gas and electricity industries in Australia.
  • Refer to aseXML Message. See B2B Procedures: Technical Delivery Specification.
  • Guidelines for the development of a Standard for Energy Transactions in XML (aseXML).
  • Software that manages aseXML message interactions. See B2B Procedures: Technical Delivery Specification.
  • Specification to describe the structure of an aseXML message.
  • See Transaction.
  • An aseXML transaction that includes CSV formatted data. See B2B Procedures: Technical Delivery Specification.
  • Accredited Service Provider, providing connection services in NSW.
  • A strategy for the testing of metering installations submitted by an MC and approved by AEMO under clause S7.6 of the NER.
  • aseXML Standards Working Group
  • Energy generated for use within power stations, excluding pumped hydro. Electricity consumed to charge battery storage facilities is a primary input and treated as a Market Load. Also called Parasitic Load or Self-load
  • Australian Wind Energy Forecasting System. Established in response to the growth in intermittent generation in the NEM, and the increasing impact this growth was having on NEM forecasting processes. The system aims to provide better forecasts that will drive improved efficiency of overall NEM dispatch and pricing, and permit better network stability and security management.
  • Australian Wind Energy Forecasting System. Established in response to the growth in intermittent generation in the NEM, and the increasing impact this growth was having on NEM forecasting processes. The system aims to provide better forecasts that will drive improved efficiency of overall NEM dispatch and pricing, and permit better network stability and security management.
  • B
  • Business-to-Business. Generic term used to refer to defined business-to-business interactions between participants; excludes interactions between a participant and market systems such as MSATS.
  • A generic term used to refer to an aseXML message or transaction acknowledgement, specifically within the context of a B2B interaction. A B2B acknowledgement is the physical interpretation of a Business Signal. Often referred to as being positive (indicating correctness of the associated file) or negative (indicating an error with the associated file).
  • A web interface supporting the creation and management of a defined set of business-to-business transactions and acknowledgements. Optionally used to manage your B2B inbox and outbox. It remains part of the B2B e-Hub services.
  • An application supplied by AEMO for participants to manage their MSATS B2B Handler inbox and outbox, and support the creation of a specified set of B2B Transactions.
  • A list of contact details published by participants used for the purpose of contact between participants to support B2B communications according to the B2B Procedures.
  • Either API or FTP
  • An electronic information exchange platform facilitating B2B Communications.
  • A message acknowledgement generated by the B2B e-Hub Handler, see B2B Procedures: Technical Delivery Specification.
  • An extension of the MSATS batch handler managing the B2B Communications between participant ID folders and AEMO. For details, see B2B Procedures: Technical Delivery Specification.
  • The file directory where participants publish B2B messages and acknowledgements for other participants, see B2B Procedures: Technical Delivery Specification.
  • The file directory where participants receive B2B messages and acknowledgements from other participants, see B2B Procedures: Technical Delivery Specification.
  • A participant accredited to use the B2B e-Hub, e.g. Local Retailers, Market Customers, and Distribution Network Service Providers.
  • AEMO provides the following pre-production and production environment e-Hub services: 1. The MSATS Browser functionality accessible over MarketNet. 2. The FTP Gateway accessible over MarketNet (to support the B2B hokey-pokey protocol). 3. The e-Hub Portal functionality accessible over MarketNet or the internet. 4. The e-Hub API functionality accessible over internet or MarketNet. Either to push the messages or pull the message from the e-Hub queue using RESTful APIs.
  • See B2B message
  • See National B2B infrastructure.
  • The participant who initiates a B2B interaction.
  • A complete set of related exchanges of B2B messages between two participants involving: Business Document, Business Receipt, Business Acceptance/Rejection.
  • A document detailing the specific aseXML interfaces used in the implementation of B2B transactions.
  • A B2B transaction or acknowledgement sent between a B2B initiator and a B2B recipient.
  • A B2B Transaction not having a corresponding reply.
  • The documents that comprise the B2B Procedures prescribing the content of, the processes for, and the information to be provided to support B2B communication.
  • A defined business process of which a B2B interaction is a key component. Examples of B2B processes are: Service Orders, Customer & Site Details, Meter Data Request, and One Way Notification.
  • Either the FTP or API delivery method
  • The receiving participant of a B2B transaction or acknowledgement (sent by a B2B initiator). As a convention, the initiator of a B2B interaction is the participant who sends the business document.
  • Using the Responder, participants with appropriate access rights can specify the standard transactions they would like to receive. Participants can also search and track the flow of messages between the Responder and themselves.
  • A collection of B2B procedures and supporting documentation that collectively form a coherent set of requirements (an industry B2B Standard). The components of a B2B standard are described by the B2B Standards Framework.
  • Describes the components of a B2B standard.
  • An aseXML realisation of a Business Document.
  • The transactions defined in the B2B Procedures. See B2B Procedures: Technical Delivery Specification.
  • Business-to-Market
  • As defined in the AER RoLR Guidelines.
  • The band availability for the period corresponding to the Price Band for the matching Period.
  • Generating units that typically run at all times throughout the year except during maintenance outages. Coal-fired generating units are a typical example of base load generating unit.
  • A device complying with Australian Standards, containing a measurement element(s) and a record of the accumulated quantity of the electricity flowing through the power conductor. Also known as an accumulation meter.
  • A party that applies a profile shape to a Basic Meter read to produce calculated interval data.
  • A right type assigned to a user, allowing the use of the Batch Transaction Handlers.
  • The table that allows execute access to batch commands to be assigned to a user right.
  • Communication between participant ID folders and AEMO. Each participant ID set of folders has at least two subfolders, \import and \export, with naming relative to the participant ID.
  • Allows communications between AEMO's systems and participant systems. When communications are processed using the Batch Handlers, they undergo the same validity checks as if they were processed using the web portal.
  • An application providing an interface for batch transactions, called MSATS Participant Batcher.
  • Bulk Change Tool: A component of MSATS used by AEMO to make bulk changes to data without requiring the submission of Change Requests.
  • Energy - Scheduled Loads
  • A single bid submission that includes all bids for each gas day.
  • The grid where you enter or view Bid/Offer details.
  • The term Bid relates to the following Dispatch Bids: Energy (Scheduled Loads) The term Offer relates to the following Dispatch Offers: 1. Energy (Generation Dispatch Offer) 2. Frequency Control Ancillary Service (FCAS) 3. Market Network Service Provider (MNSP - Network Dispatch Offer)
  • 12:30 pm on the day before Trading Day of the Dispatch Offer
  • The JSON file submitted to AEMO's market systems for a Dispatch Offer or Bid.
  • Daily or Rebid
  • There are two billing run types: Final and Revision.
  • Basic Meter Profile: The application of profile shape data to accumulated metering data to create half-hourly interval metering data for a Profile Area.
  • Basic Meter Profile: The application of profile shape data to accumulated metering data to create half-hourly interval metering data for a Profile Area.
  • Business-to-Business and Market Settlement and Transfer Solutions Reference Group. Established to provide advice to the Information Exchange Committee (IEC) on the issues and opportunities relating to the B2B framework and its procedures, and to develop changes to these where necessary on behalf of the IEC.
  • Bureau of Meteorology. Executive agency of the Australian government responsible for providing weather services to Australia and surrounding areas. Strategic partnership with AEMO for forecasting since 2018.
  • A function in MSATS where AEMO bundles MSATS Change Request Notifications. This means that instead of sending Change Request notifications as individual XML messages containing a single transaction, many can be bundled into a single XML message (one message, with multiple transactions, in a single file).
  • As defined in the NERL.
  • A specific instance of a business acceptance/rejection business signal indicating acceptance.
  • A business signal indicating whether a business document is accepted or rejected based on the application of business rules. See each B2B procedure for further details regarding the use of this transaction.
  • As defined in the Rules. [A day other than a Saturday, or Sunday or a day which is lawfully observed as a national public holiday on the same day in each of the participating jurisdictions.
  • Notifications, Requests, or Responses between participants, containing relevant business information for the following transactions:  MeterDataNotification  ProvideMeterDataRequest  VerifyMeterDataRequest  ServiceOrderRequest  ServiceOrderResponse  CustomerDetailsNotification  CustomerDetailsRequest  SiteAccessNotification  OneWayNotification  PlannedInteruptionNotification  MeterFaultandIssueNotification  NoticeOfMeteringWorksTransaction  NotifiedPartyTransaction
  • The reason for the acceptance or rejection of a B2B Transaction.
  • A group of participant companies (each with their own Participant IDs) that are part of a single commercial enterprise.
  • A period of one hour within a business day.
  • Normal operating hours for a participant.
  • A business signal indicating a business document has been received and its contents indicates if it is readable by the recipient.
  • Specific instance of a Business Acceptance/Rejection business signal indicating a rejection.
  • An acknowledgement generated by a B2B recipient on processing a business document to indicate whether the business document is received and is readable (this business signal is called a business receipt) or it does or does not pass business rule validation (this business signal is called a business acceptance/rejection).
  • C
  • An MSATS report that containing current CATS Standing Data for one or more NMIs.
  • A ServiceOrderStatus indicating the Service Order is cancelled.
  • A status of a Change Request.
  • Capacity on pipeline or compressor infrastructure.
  • Generating units modelled in the EAAP are categorised into Baseload, Intermediate or Peaking generation groups.
  • A category of MP accredited to install whole current meters of a manually read metering installation only.
  • A category of MP accredited to provide, install, and maintain a metering installation.
  • A category of MDP accredited to collect metering data from manually read metering installations only.
  • A category of MDP accredited to provide metering data services related to the collection, processing, storing, and delivery of metering data.
  • Consumer Administration and Transfer Solution includes the Participant Life Cycle, CATS, and NMI Standing Data management.
  • Consumer Administration and Transfer Solution includes the Participant Life Cycle, CATS, and NMI Standing Data management.
  • As defined in the MSATS Procedures: CATS Procedures. Any organisation that has a defined role in the MSATS system, see role.
  • MSATS Procedures: CATS Procedure Principles and Obligations
  • The data held in the following database tables: • CATS_NMI_Data_Stream • CATS_NMI_Data • CATS_Meter_Register • CATS_NMI_Participants_Relationships • CATS_Register_Identifier NMI Standing Data is a sub-set of the CATS Standing Data.
  • The rules specifying which CATS Standing Data can be accessed, as specified in section 41.5 of the CATS Procedures.
  • Contracted but un-nominated capacity
  • Combined Cycle Gas Turbine. Uses both gas and steam turbine cycles in a single plant to produce electricity with high conversion efficiencies and low emissions.
  • Clean Energy Council
  • Carpentaria Gas Pipeline. A transmission pipeline system in Queensland.
  • A code that identifies a type of Change Request. It defines rules such as what NMI information can be updated and which roles will receive a Change Request Notification each time the Change Request Status is updated.
  • A transaction submitted by participants in MSATS whenever they want to create or update data held in MSATS.
  • A notification generated by MSATS and provided to one or more participants as a consequence of a change of status of a Change Request.
  • The nominated status in the Change Request life cycle. Can be one of the following statuses: Requested, Pending, Completed, Objected, Cancelled, or Pending Validation.
  • Rules that specify which roles are advised when a Change Request undergoes a change in status, as described in the CATS Procedures for each Change Reason Code.
  • See NMI checksum.
  • The Embedded Network Code populated in the EmbNetChild field in MSATS for a Child NMI to indicate that the NMI is a child for a specified embedded network.
  • The NMI assigned to a child connection point.
  • Congestion Information Resource. A consolidated source of information relevant to the understanding and management of transmission network congestion (constraint) risk.
  • 5.00 PM at the location of the site on a business day.
  • Controlled Load Profile; a type of load profile calculated in accordance with the Metrology Procedure.
  • Controlled Load Profile; a type of load profile calculated in accordance with the Metrology Procedure.
  • A cluster is a group of intermittent generating units; there may be more than one cluster in a Unit. AEMO may agree to have non-identical turbines in a cluster in exceptional circumstances.
  • Council of Australian Governments. The peak intergovernmental forum in Australia.
  • A bid with multiple Products.
  • One of the status points of a Change Request.
  • The date the connection point is connected to the electricity network, see B2B Procedure: Service Order Process.
  • An end use customer of energy.
  • The electricity used over a period of time
  • External and internal business contacts, similar in functionality to an address book. A contact may be an internal contact within the participant organisation, or could be an external contact belonging to another market participant.
  • Relates to transmission services or distribution services; a service permitted by the laws of the relevant participating jurisdiction to be provided by more than one service provider as a contestable service or on a competitive basis.
  • Refers to one or all of (1) the fast raise service; (2) the fast lower service; (3) the slow raise service; (4) the slow lower service; (5) the delayed raise service; and (6) the delayed lower service
  • Shippers preferences for contracts or agreements they want to trade against.
  • A reference number to a contract or agreement held by the Shipper and the Facility Operator to trade capacity on a facility. This is a collective term that includes the Service Provider Reference, DWGM Reference, and STTM Customer Registration Number.
  • The Contract References selected by the participant for netting.
  • The contractual arrangement between the two parties that underlies the reallocation transaction.
  • Load controlled by the metering installation (e.g. frequency injection relay or time clock) and may be separately metered from the remaining load at a metering point. The majority of Controlled Loads are associated with off-peak hot water, pool pumps, and air-conditioning units.
  • An Unmetered Device that has a predictable load and is switched in accordance with an On/Off Table (e.g. street lighting).
  • AEMO's SCADA system
  • In the NEM (except Victoria): as defined in the NERR. In Victoria: As defined in the Energy Retail Code published by the Essential Services Commission of Victoria.
  • The authoriser of the Reallocation
  • The extension of a corrupt acknowledgement file.
  • Change Request
  • Provides the participant user the access right to create records represented by an entity.
  • The market participant credited with the reallocation amount for a reallocation, as part of settlement for the relevant billing period.
  • The participant who receives a credit settlement transaction in their settlement statement for any Cap, Dollar, Energy and Floor Reallocation Transactions that have a positive value and when the Spot Price is greater than the Strike Price for a Swap Reallocation
  • The participant who receives a credit Reallocation
  • Freeform text supplied by the Credit Participant
  • Customer Registration Number
  • Comma-separated values; a file format for exchanging data.
  • A defined data payload applicable only for some transactions in the One Way Notification Procedure.
  • Current transformer
  • Capacity Trading Platform
  • Capacity Trading Platform
  • The participant can receive files compliant to the current aseXML version.
  • As defined in the MSATS Procedures, CATS Procedures. The retailer identified on the current NMI master record.
  • As defined in the MSATS Procedures, CATS Procedures. The LNSP identified on the current NMI master record.
  • As defined in the MSATS Procedures, CATS Procedures. The MDP identified on the current NMI master record.
  • The entity associated with the meter installation and retail arrangements of a consumer.
  • See current FRMP
  • As defined in the MSATS Procedures, CATS Procedures. The RP identified on the current NMI master record.
  • The elements of data identified in any of the notification transactions detailed in the B2B Procedures: Customer and Site Details Notification Process. See B2B Procedures: Customer and Site Details Notification Process.
  • Includes new, amended, additional, or removal of one or more elements of data identified in any of the notification transactions detailed in the B2B Procedures: Customer and Site Details Notification Process. See B2B Procedures: Customer and Site Details Notification Process.
  • A code used to determine the classification of an retail customer. For more information, see the CATS Procedures.
  • The elements of data identified in the customer details notification transaction detailed in the B2B Procedures: Customer and Site Details Notification Process. See B2B Procedures: Customer and Site Details Notification Process.
  • Includes new, amended, additional, or removal of one or more elements of data identified in any of the customer details notification transactions detailed in the B2B Procedures: Customer and Site Details Notification Process. See B2B Procedures: Customer and Site Details Notification Process
  • A code used in MSATS to determine the consumption for an End User at a single connection point. for more information, see section the CATS Procedures.
  • D
  • Day Ahead Auction. An auction of contracted but un-nominated capacity in Pipeline Capacity Trading (PCT). It is conducted after nomination cut-off and is subject to a reserve price of zero.
  • Offer Type submitted before the Offer Cut-off Time (12:30 PM the day before the Trading Day
  • Lists the dates specified actions need to occur for the provision of metering data and settlements ready data to AEMO.
  • A set of cooperating applications used to replicate data between AEMO's energy market systems and a participant's DBMS conforming to the MMS Data Model.
  • Refers to the Electricity or Gas Data Models, which is the definition of the interface to participants for data published by AEMO.
  • A transaction initiated by MSATS and sent to a participant at the Pending Validation status of the Change Request life cycle.
  • Each participant ID can share their data with other participant IDs, subject to an authorised request. Implementing data sharing means the full Data Interchange data set (including private data) for the requesting participant ID is made available to another participant's sets of folders in the EMMS file server, as nominated in the request. The sharing of data is for both pre-production and production. A data sharing requirement may emerge, for example, due to a merger with, takeover of, or sale of another registered participant. The requirement may be to use one company's IT system to manage access, and process the data for two or more participant IDs using just one participant IDs set of folders in the EMMS file server. The Data Interchange web application in the Markets Portal provides the status of any data sharing agreements you have implemented.
  • A stream of metering data associated with a connection point, as represented by a NMI. A NMI can have multiple data streams (e.g. from one or more meters, or from one or more channels or registers that comprise a single meter).  Each data stream is identified by a unique suffix associated with the NMI.
  • A code used in MSATS to indicate whether a Data stream is used in settlements. For more details, see the CATS Procedures.
  • A web application in the Markets Portal used to subscribe to Data Interchange files and to obtain the latest MMS Data Model. These files are typically csv files containing public data and participant’s private data. AEMO recommends participant use of the Data Interchange suite of products, supplied by AEMO, to automate receiving and storage of the files to their systems. AEMO provides working sample software for FTP access (Participant Batcher) to MarketNet and working sample software for Data Interchange.
  • Distribution Business. In the energy sector, these refer to businesses that convert high-voltage electricity back to a low voltage for distribution via the infrastructure of poles and wires.
  • Database Management System
  • A connection point that is not electrically connected to the network. See B2B Procedures: Service Order Process.
  • The market participant debited with the reallocation amount for a reallocation, as part of settlement for the relevant billing period.
  • The participant who receives a debit settlement transaction in their settlement statement for any Cap, Dollar, Energy and Floor Reallocations that have a positive value and when the Spot Price is greater than the Strike Price for a Swap Reallocation
  • The participant who receives a debit Reallocation
  • Freeform text supplied by the Debit Participant
  • Procedure for Metering Providers, Metering Data Providers, Embedded Network Managers and Metering Coordinators.
  • Provides the participant user the access right to delete records represented by an entity.
  • Either the API or FTP protocol
  • A transaction record representing a participant’s obligation to deliver or receipt gas. Delivery transactions are generated on import from the ETS where the transaction is in a product that is not netted for delivery or by the Delivery Netting Module if the transaction is associated with a delivery netting product.
  • The amount of power consumed at any time
  • Distributed Energy Resources
  • Distributed Energy Resources
  • DER Register
  • Data Interchange: The set of cooperating applications to replicate data between AEMO’s Wholesale Market Systems and a participant’s RDBMS conforming to the Electricity and/or Gas Data Models.
  • Data Interchange: The set of cooperating applications to replicate data between AEMO’s Wholesale Market Systems and a participant’s RDBMS conforming to the Electricity and/or Gas Data Models.
  • The service provider's personnel performing a de-energisation service order. Refer B2B Procedures: Service Order Process.
  • When a Legacy version of a file replaces an existing Legacy file, some versions of the included reports may change. The replaced report versions are referred to as discontinued. Participants on Discontinued versions may be impacted if a report is discontinued in a Legacy file they are receiving.
  • Refers to the tables, files, and reports deployed two versions ago. AEMO only supports the current and previous Data Model versions.
  • Five minutes ahead
  • The JSON schema used to provide Dispatch Bids and Offers into the NEM.
  • The term DNSP is used in favour of Distributor in the B2B Procedures.
  • Distribution Loss Factor
  • Distribution Loss Factor
  • A code used in MSATS to identify a distribution loss factor.
  • Dispute Management System. A system designed to manage the resolution of disputes, and a requirement for AEMO and all registered participants.
  • Distribution Network Service Provider
  • Distribution Network Service Provider
  • Delivery point identifier; an Australia Post assigned identifier that is a numeric descriptor for a postal delivery point equal to a physical address.
  • Dispatch
  • Demand Side Participation
  • Demand Side Participation Information Portal
  • Declared Transmission System (Victoria). Victoria’s gas transmission system, operated by AEMO.
  • Distribution Unaccounted For Gas. Business rules and data formats which enables the exchange of required information between distributors and market participants.
  • A semi-scheduled generating unit or a non-scheduled generating unit
  • Distribution Use of System Charge. Charge levied by distribution network businesses to recover operations and maintenance costs and investment returns on distribution assets.
  • Declared Wholesale Gas Market
  • Declared Wholesale Gas Market
  • AEMO’s reference number to the agreement between a Shipper and Facility Operator for capacity trading on the DWGM.
  • E
  • Consists of the API Web Portal and the API Gateway for both electricity and gas.
  • AEMO provides the following pre-production and production environment e-Hub interfaces: 1. The MSATS Browser functionality accessible over MarketNet. 2. The FTP Gateway accessible over MarketNet (to support the B2B hokey-pokey protocol). 3. The e-Hub Portal functionality accessible over MarketNet or the internet. 4. The e-Hub API functionality accessible over internet or MarketNet. Either to push the messages or pull the message from the e-Hub queue using RESTful APIs.
  • Energy Adequacy Assessment Projection
  • Energy Adequacy Assessment Projection
  • Software used to conduct Monte Carlo simulations.
  • The EAAP engine and the GELF Declarations application in the Markets Portal.
  • Electronic Business XML. An internationally developed set of protocols for using XML. ebXML is a wide ranging standard that covers all layers of messaging. The VicGas FRC project has adopted only the transport, routing and packaging (TRP) recommendations of ebXML, and is using aseXML to define standards for message content.
  • Energy Conversion Model for Wind and Solar
  • Electricity Data Model
  • Enterprise Data Platform
  • Exempt Embedded Network Service Provider
  • The latest Bid/Offer File acknowledged by AEMO's systems.
  • The latest acknowledged Bid/Offer file date
  • Intermittent Generation term
  • Eastern Gas Pipeline. A pipeline that runs to/from Sydney to Melbourne to supply southern domestic demand.
  • Residential and business battery powered vehicles, such as motor bikes, cars, and large commercial trucks
  • The Electricity Data Model is the definition of the interface to participants of data published by AEMO from National Electricity Market (NEM) systems.
  • Required on a per cluster basis to indicate the number of elements (turbines or inverters) within each cluster unavailable for generation (due, for example, to maintenance, turbines not being built, or the inability to generate because transmission or distribution networks are unavailable).
  • Code to identify an embedded network.
  • Electricity Market Management System (formerly MMS); software, hardware, network and related processes.
  • Energy Management System
  • Energy Management System
  • Embedded network. Private electricity networks that serve multiple premises and are located within, or connected to, a distribution or transmission system through a parent connection in the National Electricity Market.
  • A connection point that is electrically connected to the network, see B2B Procedures: Service Order Process.
  • The unit must be a generator for the service type: ‘energy’. Loads cannot bid for mandatory restrictions capacity.
  • The unit must be a generator for the service type, Energy. Loads cannot Offer for mandatory restrictions capacity.
  • A small distributed battery storage for residential and commercial consumers
  • Embedded Network Local Retailer. The designated retailer for small customers seeking connection to an embedded network.
  • Embedded Network Manager
  • Entities are the individual components or building blocks that represent individual pieces of functionality. The main menu options are examples of individual Entities. Entities can be of type “batch” (submitting change requests using the Batch Handlers) or “interactive” (using AEMO’s web portal).
  • The individual components or building blocks of the MSATS system, representing individual pieces of functionality. Some examples of entities are the menu options available on the MSATS main menu (ombudsman, role assignment, create participant, CATS reports and so on).
  • End of Day (gas). Benchmark price of gas for the previous day as per the National Gas Rules.
  • End of Day Linepack. Gas in pipelines, measured at the end of a gas day at 6am. EOD LP is equal to the beginning-of-day linepack (BOD LP) for the next gas day.
  • Economic Regulation Authority Western Australia. WA’s independent economic regulator.
  • Energy Security Board. Responsible for the implementation of the recommendations from the Independent Review into the Future Security of the National Energy Market (the Finkel Review). It also provides whole-of-system oversight for energy security and reliability.
  • Electricity Statement of Opportunities
  • Electricity Statement of Opportunities
  • Energy Storage Systems
  • An estimate of a Meter Reading where an Actual Meter Reading for a period in the past is not available.
  • The forward estimation of metering data.
  • Exchange trading system
  • Exchange trading system
  • A unique code that is the same as the trading participant identifier used in the Exchange Trading System.
  • Estimated ultimate recovery. An approximation of the quantity of gas that is potentially recoverable or has already been recovered from a reserve.
  • Electric Vehicle
  • A specific code used to refer to a business event defined in a B2B Procedure, see B2B Procedures: Technical Delivery Specification.
  • Lodged before the target trading intervals occur, when the volume and price are unknown.
  • Lodged after the target trading intervals occurred, where the volume and price are known.
  • Represents a transaction entered into through the exchange. The record is relevant for financial settlement and prudential purposes.
  • Exemption Guideline forSmall Customer Metering Installation.
  • Exemption Procedure for Metering Installation Malfunctions.
  • A reallocation request expires if it is not authorised prior to the submission cut-off date applicable to the start date of the reallocation request.
  • In the NEM, apart from Victoria, as defined in the NERL. In Victoria, as defined in the Energy Retail Code published by the Essential Services Commission of Victoria.
  • F
  • The facility to assist in the selection of the Receipt and/or Delivery Point.
  • A retailer that is the subject of a RoLR Event.
  • Frequency Controlled Ancillary Services
  • Frequency Controlled Ancillary Services
  • FCAS Verification Tool (FCASVT), is an MS Excel based tool used and designed by SPC to assess and verify the performance of MASP in delivery of contingency services
  • As described in the CATS Procedures, they specify, for each Change Reason Code, the fields in MSATS populated at the creation of a transaction or at other times in the life cycle of a transaction.
  • Logically groups one or more reports delivered as a physical file, for example BILLING. Participants subscribe to files in the Markets Portal > Data Interchange > Data Subscription interface.
  • Refers to the number of files in an inbox or outbox at which point the B2B Handler generates a flow control file, see B2B Procedures: Technical Delivery Specification.
  • See MSATS File Exchange Protocol in the B2B Procedures: Technical Delivery Specification.
  • The last Actual Meter Reading taken where an End User vacates an address, changes retailer, all or any part of a metering installation is removed, or modified and the modification affects the energy data in the metering installation.
  • A Controlled Load that is a first-tier load. For the purposes of the Metrology Procedure, a first-tier load also includes the electricity purchased at a connection point directly and in its entirety from the Local Retailer even if it is not classified.
  • An end use customer whose energy retailer is the local retailer.
  • The electricity associated with a first tier NMI (classified as a first tier load) is purchased at a connection point directly and in its entirety from the local retailer.
  • An agreement type where the values entered for the reallocation transaction are direct dollar amounts for each gas day in the period to which the reallocation request relates.
  • Optional MW, not greater than the max. availability
  • An agreement type where the values entered for the reallocation amount are the product of the applicable reference price and the energy reallocation quantity specified.
  • Facility operator
  • An organisation’s exposure dollar amount attributable to all forward dated submitted or executed orders or both, where the delivery dates are calculated based on submitted orders, executed trades, and reallocations where the delivery date is today and in the future (exclusive of GST). This is calculated at the time of each prudential run and makes up part of the prudential exposure.
  • Full Retail Contestability. The gas and electricity markets in which customers are free to select their energy retailer.
  • The range of Local Frequency through which a Variable Controller will not operate
  • Settings allocated to the Ancillary Service Facility by AEMO within the range.
  • An occasion when the frequency of the power system moves outside the normal operating frequency band
  • The time at which Local Frequency falls or rises outside the normal operating frequency band during a Frequency Disturbance, referenced to Australian Eastern Standard Time
  • Means 0.125 hertz (Hz) per second for regions other than Tasmania or 0.4 Hz per second for the Tasmanian region
  • Tthe first change in Local Frequency from above 50.15 Hz to below 50.1 Hz, or below 49.85 Hz to above 49.9 Hz, to occur after a Frequency Disturbance
  • Financially Responsible Market Participant, usually a retailer, Generator, Market Customer or a Market Small Generator Aggregator, identified in respect of a connection point.
  • Financially Responsible Market Participant, usually a retailer, Generator, Market Customer or a Market Small Generator Aggregator, identified in respect of a connection point.
  • Fast start minimum load (MW). Only relevant to Service type, Energy.
  • Fast start minimum load
  • File transfer protocol
  • AEMO systems to participant systems interaction using batch processing, suitable for Participant systems using database technology and submission or receipt of high volumes of data. o Management of security and data distribution. AEMO recommends this method to replicate large amounts of data
  • A B2B e-Hub delivery method.
  • An aseXML transaction not containing a CSV payload, see B2B Procedures: Technical Delivery Specification.
  • Forecast Uncertainty Measure
  • G
  • A specific and designated day of gas trading.
  • Gas Bulletin Board
  • Gas Bulletin Board
  • Generator Energy Limitation Framework
  • Generator Energy Limitation Framework
  • GELF parameters submitted via the EMMS Web Portal by scheduled generators.
  • Parameters of the Generator Energy Limitation Framework (GELF).
  • Water storages used in the EAAP models to represent hydro power schemes. A component of static GELF parameters, see “Static GELF parameters”.
  • A collection of physical generating units of the same related capacity. A component of static GELF parameters, see “Static GELF parameters”.
  • Greenhouse Gas Abatement Scheme. The first mandatory trading scheme aiming to lower greenhouse gas emissions in New South Wales.
  • Gigajoule
  • Gladstone LNG. A liquefied natural gas plant in Queensland.
  • In relation to any undertaking and any circumstances, the exercise of that degree of skill, diligence, prudence, and foresight that would reasonably and ordinarily be expected from a skilled and experienced operator engaged in the same type of undertaking under the same or similar circumstances.
  • Gas Powered Generation. Electricity generation or generator powered by gas.
  • Gas Retail Consultative Forum. A monthly forum for consultation between AEMO and stakeholders on the development of the retail gas markets operating in New South Wales, the Australian Capital Territory, Queensland, South Australia, Victoria and Western Australia.
  • Gas Supply Hub
  • Gas Supply Hub
  • The trading participant submitting bids using the Exchange Trading System.
  • The party paired with the participant for gas delivery and receipt. The counterparty receives a notification requesting confirmation when a delivered quantity record is submitted.
  • Refers to both trading participants and reallocators.
  • A bid or offer.
  • A member of exchange holding bank guarantees against which prudential exposure is determined. An organisation has associated trading participants in the GSH, or associated reallocation participants, and incurs settlement liabilities or credits or both.
  • An executed agreement between a market participant and AEMO, allowing use of the GSH Reallocations web application to facilitate reallocation transactions. Persons registering as reallocators complete the Letter of Agreement during registration. Trading participants wanting to use reallocations can find the GSH Reallocation Letter of Agreement on AEMO's website.
  • Trading participant submitting offers using the Exchange Trading System.
  • Gas Services Information. A suite of regulatory instruments to improve security and transparency of information in Western Australia. They establish the Western Australia Gas Bulletin Board (WA GBB) and Western Australia Gas Statement of Opportunities WA GSOO).
  • Gas Statement of Opportunities. AEMO’s 20-year forecast of gas demand and supply adequacy in eastern and south-eastern Australia; and AEMO’s 10-year forecast of gas demand and supply adequacy in Western Australia’s domestic market.
  • Gas Wholesale Consultative Forum. Enables collaboration between AEMO, the Australian Energy Market Commission, the Australian Energy Regulator, relevant jurisdictional bodies, industry participants, and other interested parties on the development and implementation of changes to AEMO’s east coast wholesale gas markets and related market systems.
  • Gigawatt hours
  • H
  • A health and/or safety risk at a site, see B2B Procedures: Customer and Site Details Notification Process and B2B Procedures: Service Orders Process.
  • Metering data provided for a previous reading period.
  • The FTP Protocol
  • See local retailer
  • Hypertext Transfer Protocol Secure, adds the security capabilities of SSL to standard HTTP communications.
  • High voltage
  • High voltage current transformer
  • I
  • Integrated Gasification Combined Cycle. A technology that uses a high-pressure gasifier to turn coal and other carbon-based fuels into pressurised gas, known as synthesis gas or syngas. It can then remove impurities from the syngas prior to the power generation cycle.
  • International Laboratory Accreditation Cooperation
  • Bids or Offers superseded by a subsequent bid
  • The Generation Amount or Load Amount just prior to the Frequency Disturbance Time of a Frequency Disturbance
  • The first of the status points of a Change Request.
  • The first message in a series of related messages, see B2B Procedures: Technical Delivery Specification.
  • As described in the CATS Procedures, the rules that specify who can initiate a Change Request in MSATS.
  • The participant initiating a B2B Interaction.
  • An official appointed in respect of a retailer or any property of the retailer, including a receiver, receiver and manager, administrator, provisional liquidator, liquidator, trustee in bankruptcy, or person having a similar or analogous function.
  • A right type assigned to a participant user to access the B2B Web Browser or Web Services.
  • The table allowing Create, Read, Update, or Delete privileges for an interactive entity to be assigned to a right. This determines what a participant user can access in MSATS.
  • Interaction with the MSATS web portal.
  • Generating units that are not included in the baseload generation or peaking generation are generally included in this category.
  • A person who owns, operates or controls a generating unit
  • Period over which interval energy data is recorded by the metering installation that corresponds to a TI or submultiples of a TI.
  • A meter that measures consumption of electricity for each specified interval (usually half-hourly to align with wholesale market trading intervals). It is manually read, or remotely read using a communications network.
  • A table of devices for unmetered loads associated with each NMI as described in the Metrology Procedure: Part B.
  • Internet protocol wide area network
  • Inter-Regional Settlements Residue
  • Inter-Regional Settlements Residue
  • Integrated System Plan. AEMO’s whole-of-system plan that provides an integrated roadmap for the development of the National Electricity Market (NEM).
  • Invitation to Tender
  • J
  • Jurisdictional Planning Body
  • Jurisdictional Planning Body
  • JavaScript Object Notification
  • The schema comprising the entire JSON Bid and Offer File
  • A JSON document that is an object containing keywords or schema keywords. A JSON Schema can contain properties that are not schema keywords.
  • participating jurisdiction (defined in the NER)
  • Codes used in MSATS to identify the Jurisdiction a NMI belongs to, as specified in the CATS Procedures.
  • L
  • Local area network
  • The participant is set up to receive both current and next projected future version of aseXML-compliant files.
  • Refers to the tables, files, and reports deployed in the latest Data Model release.
  • Largest Credible Risk
  • Currently supported but no longer updated. If a report is changed in a release, the previous version of the report and the latest version of other reports in the file are delivered from the Legacy file. AEMO automatically moves participants’ subscriptions to the Legacy file. This ensures participants on previous Data Model versions subscribed to files that change, continue to receive the same data. Once upgraded, and the new data is received, you can unsubscribe from the Legacy files. Participants still on discontinued file versions may receive different content if the Legacy file content has changed.
  • Loss Factor. Annual calculations reflecting the amount of electricity lost on electrical transmission and distribution networks.
  • Load Following Ancillary Service. A power system security ancillary service in WA’s South West Interconnected System (SWIS), where assigned generators automatically and constantly change their output to compensate for load and wind fluctuations, to regulate system frequency.
  • Load Forecasting Reference Group. A group dedicated to sharing expertise and facilitating the continued development and accuracy of AEMO’s gas and electricity forecasts.
  • A situation where an End User relies on electricity for the operation of life support equipment. A term defined in: • The NEM, apart from Victoria, in the NERR. • Victoria, in the Electricity Distribution Code and Energy Retail Code.
  • Large industrial loads
  • Multiple point-to-point combinations on the same or different facilities.
  • SRA procedures term
  • Identifies the MNSP interconnector link in AEMO's systems. A property in the MNSPBidLink object in the JSON bidding schema
  • Longford to Melbourne Pipeline. The pipeline that transports gas from Longford in South Gippsland, Victoria, to Melbourne.
  • Liquefied Natural Gas. Natural gas cooled to liquid form so it can easily be transported.
  • In the context of a Network Service Provider’s distribution network: Local Network Service Provider In relation to a child connection point: ENM. For the purposes of the Metrology Procedure: If there is more than one Local Network Service Provider for a local area, a reference to the LNSP in respect of a metering installation or connection point is a reference to the LNSP that holds a licence in respect of the network to which that metering installation or connection point is connected. legislation in the relevant participating jurisdiction. Includes both transmission and distribution businesses.
  • In the context of a Network Service Provider’s distribution network: Local Network Service Provider In relation to a child connection point: ENM. For the purposes of the Metrology Procedure: If there is more than one Local Network Service Provider for a local area, a reference to the LNSP in respect of a metering installation or connection point is a reference to the LNSP that holds a licence in respect of the network to which that metering installation or connection point is connected. legislation in the relevant participating jurisdiction. Includes both transmission and distribution businesses.
  • A profile of metering data aggregated across a specified set of connection points.
  • A table of Unmetered Device market loads published by AEMO at http://www.aemo.com.au/Electricity/National-Electricity-Market-NEM/Retail-and-metering.
  • The geographical area allocated to a network service provider by a Jurisdictional Regulator.
  • A Java logging facility, enabling logging at run time without modifying the application binary.
  • Lack of Reserve
  • Lack of Reserve
  • The lot reference number allocated to a street address prior to street numbering (except in the ACT).
  • Linear Program. A mathematical method that is used to determine the best possible outcome or solution from a given set of parameters or list of requirements.
  • Linepack Account. A market-balancing mechanism in the Declared Transmission System (DTS) that accounts for imbalance and deviation payments, and the costs associated with unaccounted-for gas (UAFG).
  • Local Retailer
  • Local Retailer
  • Low Reserve Condition. When AEMO forecasts that a region's reserves will fall short of what is required to meet the reliability standard.
  • Large-scale Renewable Energy Target. A target scheme that incentivises the development of renewable energy power stations in Australia.
  • Long-Run Marginal Cost. Describes the revenue required to exactly cover financing costs, and the fixed and variable operating and maintenance costs, of the investment over the generating system’s lifetime.
  • A Voltage equal to or less than 1kV.
  • Low voltage current transformer
  • M
  • Metering Asset Management Plan. A test plan developed and maintained by an MP in accordance with the Service Level Procedure.
  • Metering Asset Management Plan. A test plan developed and maintained by an MP in accordance with the Service Level Procedure.
  • Moomba to Adelaide Pipeline. A natural gas pipeline in South Australia delivering gas from the Cooper Basin gas wells near Moomba to Adelaide.
  • National Electricity Market participant network. A network of more than 300 registered participants in the National Electricity Market, including market generators, transmission network service providers, distribution network service providers, and market customers.
  • Software, hardware, network and related processes to implement the wholesale energy market.
  • Metering Administration System. Predecessor to MSATS
  • The maximum planned availability in MW for the matching period.
  • Meter Coordinator; The Role Code used in MSATS for an MC is RP.
  • Market Clearing Engine. A software system that determines daily operational and pricing schedules for the Victorian natural gas market.
  • Maximum Credit Limit
  • Maximum Credit Limits
  • Maximum Demand. Forecasts to indicate peak demand for electricity, in this case at its half-hourly interval usage.
  • Metering Data Agent. An agency that submits meter data to AEMO, including the timing and format of submissions.
  • Meter Data File Format. The standard format for delivery of metering data to market participants, service providers and registered participants.
  • The data contained in an electronic file formatted according to the Meter Data File Format Specification.
  • The Meter Data File Format Specification for NEM12 & NEM 13.
  • Meter Data Management system includes the Profile Preparation Service, Basic Meter Profiling, and Data Aggregation.
  • A suffix defined in sections 6 and 7 of the NMI Procedure used to identify a stream of metering data. It is consistent with the NMISuffix contained in the 200 record of the MDFF interval metering datafile.
  • Meter Data Management Data File: The standard file for delivery of metering data to AEMO.
  • The MSATS Procedure: MDM Procedures.
  • Metering data provider; The party responsible for the delivery of metering data to AEMO for metering installations defined in the Rules.
  • Metering data provider; The party responsible for the delivery of metering data to AEMO for metering installations defined in the Rules.
  • Maximum Daily Quantity
  • Maximum Daily Quantity
  • An aseXML realisation of a Business Receipt.
  • Any alarm within a metering installation designed to detect any unexpected occurrence, such as a loss of supply, VT or phase failure, tamper detection, reverse energy flow, pulse overflow, cycle redundancy check error and temperature or time tolerance.
  • Any alteration or replacement of a metering installation.
  • Metering data delivered to participants is to conform to the Meter Data File Format Specification, see Meter Data File Format on AEMO's website.
  • The provision of metering data to participants as part of the MDP's normal production process obligations, see B2B Procedures: Meter Data Process.
  • The overall process for the provision of metering data to a participant by an MDP. Requests by the appropriate participant for provision of missing metering data from an MDP, or the querying of the validity of any metering data supplied by an MDP. Has 3 component processes: Meter Data Notification Process, Provide Meter Data Process, and Meter Data Verification Process, see B2B Procedures: Meter Data Process.
  • The process by which a participant queries the metering data received in a Meter Data Notification from an MDP. The process also allows a participant to provide an alternative substitution that may be considered by the MDP, see B2B Procedures: Meter Data Process.
  • The provision, installation, and maintenance of the components of a metering installation.
  • Electricity consumption data taken from a meter, regardless of how it is obtained.
  • The meter register data stored in MSATS, which includes both the metering register and other data.
  • A code used in MSATS to delineate the status of a meter. For more detail, see the CATS Procedures.
  • A serial number that uniquely identifies each metering installation record associated with a NMI.
  • The Metering Data Delivery Calendar provides the cut-off dates for MDP data delivery.
  • The type of meter attached to a NMI as described in the CATS Procedures.
  • Either a Metering Provider or a Metering Data Provider.
  • Part A National Electricity Market
  • Part B Metering Data Validation, Substitution, and Estimation Procedure.
  • Market Floor Price
  • Market Floor Price
  • Market Information Bulletin Board. The IT interface through which AEMO communicates with gas market participants.
  • Mixed Integer Linear Programming. An approach that determines the operation of the integrated power voltage and storage systems for the typical household demand profile.
  • Metering Identification Reference Number. A unique number that identifies each gas meter.
  • Megalitre
  • Megalitres per hour
  • Intra-regional marginal loss factor
  • Intra-regional marginal loss factor
  • Market Minutes Lost. The number of interruptions in time experienced by customers.
  • Market Network Service Provider
  • Market Network Service Provider
  • Market Operator Service. A standing arrangement between AEMO (the market operator) and pipeline operators for supplying or withdrawing gas beyond the quantities provided by the pipeline schedules.
  • Metering Provider; In MSATS, it is referred to as an MPB.
  • Metering Provider; In MSATS, it is referred to as an MPB.
  • A Category C Metering Data Provider. An MDP accredited only to collect metering data, not process or transfer it.
  • A Category C Metering Data Provider. An MDP accredited only to collect metering data, not process or transfer it.
  • Metering Provider Data Collection
  • Metering Provider Data Collection
  • Mandated Renewable Energy Target. A government scheme that creates demand for electricity generated from renewable sources.
  • Manually Read Interval Meter. Digital meters which record usage in 30-minute intervals.
  • Minimum Reserve Level. A calculation that works out the electricity generation capacity required to meet the Reliability Standard.
  • Market Settlement and Transfer Solution for retail electricity
  • Market Settlement and Transfer Solution for retail electricity
  • The file exchange protocol used by MSATS, see MSATS File Exchange Protocol in the B2B Procedures: Technical Delivery Specification.
  • An MSATS transaction, see MSATS Procedures: CATS Procedures and B2B Procedures: Service Orders Process.
  • An application providing an interface for batch transactions (files).
  • All of the following procedures: CATS Procedures, WIGS Procedures, MDM Procedures, NMI Standing Data Schedule, NMI Procedure, and Part A of the NEM RoLR Processes.
  • Market Small Generator Aggregator
  • Market and System Operations Rules. The policies and procedures governing Victoria’s Gas Retail Markets.
  • Moomba to Sydney Pipeline. A transmission pipeline that operates from Moomba in South Australia across New South Wales to Sydney.
  • Market Systems User Group
  • Medium Term Projected Assessment of System Adequacy. A 24-month supply demand forecast, published weekly, with daily resolution.
  • Megawatt
  • Megawatts per minute
  • Megawatt hour
  • Megawatt hours per day
  • Megawatt hours
  • Threshold for optimisation of energy-limited plant
  • N
  • Infrastructure (software and hardware) that physically enables B2B communication between participants. This includes, but is not necessarily limited to: MSATS B2B Handler (software and hardware), MSATS B2B gateways, communications between participants and MSATS, B2B gateways, and participant gateways.
  • Network Control Ancillary Services
  • National Electricity Forecasting Report
  • National Electricity Law
  • National Electricity Market
  • NEM RoLR Processes – Part A: MSATS Procedure: RoLR Procedures – Part B: B2B Procedure: RoLR Process.
  • National Electricity Market Real Time Operations
  • National Electricity Market Dispatch Engine
  • National Electricity Market Dispatch Engine
  • National Electricity Market Wholesale Consultative Forum. A forum providing stakeholders and interested parties with the opportunity to contribute ideas into developing and improving the National Electricity Market (NEM).
  • Public market data in csv file format: http://www.nemweb.com.au/
  • National Electricity Objective. The objective to promote efficient investment in, and efficient operation and use of, electricity services for the long-term interests of consumers of electricity with respect to the reliability, safety and security of the national electricity system.
  • National Electricity Rules
  • National Electricity Rules
  • National Energy Retail Law: https://www.legislation.sa.gov.au/index.aspx
  • National Energy Retail Rules
  • The rate the network business charges the retailer for the use of their network.
  • A nominated code for the Network Tariff charged by the NSP.
  • The FRMP identified on a change request prior to the change request being completed.
  • The MDP identified on a change request prior to the change request being completed.
  • Entities associated with the meter installation and retail arrangements to which a consumer transfers to.
  • Following the completion of a transfer of a NMI, the retailer that is the current FRMP.
  • The responsible person (RP) identified on a change request prior to the change request being completed, see MSATS Procedures: CATS Procedures.
  • The date of the next scheduled meter read to be undertaken by the current MDP or MPC, see MSATS Procedures: CATS Procedures.
  • NSW Gas Abatement Scheme. A mandatory scheme that aimed to lower greenhouse gas emissions in New South Wales. It ran from 2003 to 2012.
  • National Gas Emergency Response Advisory Committee. A working group of the COAG Energy Council that advises governments on responses to, and management of major gas supply interruptions affecting two or more jurisdictions.
  • National Generators Forum. A forum for representatives of electricity producers in the National Electricity Market (NEM).
  • National Gas Rules
  • National Gas Rules
  • Non-market Ancillary Service
  • Non-market Ancillary Service
  • National Metering Identifier for electricity meters
  • The address where the connection point the NMI refers to is located (the site address). During a consumer transfer, this information is supplied to the new retailer by the LNSP and acts as a check for the correct NMI identification.
  • A number, one digit in length, used to validate that a NMI supplied to CATS is a valid.
  • A code identifying the type of consumer to which a NMI belongs, e.g. large or small wholesale generators.
  • The term used to represent a NMI suffix required by MDM to enable the metering data associated with a NMI to be correctly identified.
  • The process of finding a NMI and the NMI Checksum by searching MSATS using the Site, the DPID or a meter’s serial number. For more details, see the CATS Procedures.
  • The process of entering a NMI and NMI Checksum in MSATS to obtain NMI Standing Data. For more detail, see the NMI Standing Data Access Rules in the CATS Procedures.
  • The search process that can only be used for one of the purposes detailed in the CATS Procedures.
  • The NMI master record with an end date set to the year 9999.
  • MSATS Procedures: National Metering Identifier.
  • The search available in MSATS enabling a participant to identify a NMI when the only information available is the DPID, the meter serial number, or the Site address. For more details, see the CATS Procedures.
  • The search available in MSATS enabling a participant to identify nominated CATS Standing Data.
  • The AEMO document called NMI Standing Data Schedule.
  • A code identifying the status of a NMI, for example active or inactive.
  • A code used in MSATS to determine if a NMI can be the subject of a retail transfer. For more detail, see the CATS Procedures.
  • Non-Market Non-Scheduled generating unit. A generating unit that sells its entire output directly to a local retailer or customer at the same connection point under a power purchase agreement. It is not scheduled by AEMO as part of central dispatch.
  • Non-Market Scheduled generating unit. A generating unit that sells its entire output directly to a local retailer or customer at the same connection point under a power purchase agreement. It is scheduled by AEMO as part of central dispatch.
  • A weekend or public holiday Profile Type
  • A load that is not a Controlled Load.
  • The B2B Procedures other than the B2B Procedures: Technical Guidelines for B2B Procedures and the B2B Procedures: Technical Delivery Specification.
  • Network Outage Scheduler
  • Network Outage Scheduler
  • A ServiceOrderStatus indicating the Primary Work is not complete.
  • A transaction that does not have a corresponding reply transaction, see Notification Business Transaction Pattern.
  • A B2B interaction characterised by one participant sending a notification transaction (e.g. CustomerDetailsNotification) to another participant without a corresponding reply transaction.
  • Data Payload for the One Way Notification.
  • The receiver of a B2B Transaction or B2B Acknowledgement for notification purposes only and not required to perform any services for the Initiator.
  • North Queensland Gas Pipeline. A transmission pipeline located in north-east Queensland, supplying gas from Moranbah gas processing plant to large industrial customers in Townsville.
  • Non Registered Network Service Provider. A network service provider that has been granted an exemption from registration.
  • Network Support Agreement. The binding terms of agreement that form a contract.
  • Network Support and Control Ancillary Services. A non-market service that may be procured by AEMO or Transmission Network Service Providers to maintain power system security and reliability, and to maintain or increase the power transfer capability of the transmission network.
  • Net System Load. A method used by AEMO to approximate how much electricity is used by all consumers with accumulation meters in a region, for each half hour of the day.
  • Net System Load Profile. A profile applied to convert all second-tier basic meter readings into energy consumption for each 30-minute trading interval for settlement purposes.
  • Network Service Provider
  • Network Service Provider
  • Second Network Service Provider: The Role assigned to a DNSP for a transmission connection point (wholesale NMIs) having two NSP roles.
  • Next Scheduled Read Date; The next scheduled Actual Meter Reading of an Accumulation Meter.
  • Next Scheduled Read Date; The next scheduled Actual Meter Reading of an Accumulation Meter.
  • Network Tariff Code. An operational document for customers, electricity retailers and consultants, setting out the codes, application rules and rates for each network tariff.
  • National Transmission Network Development Plan. An annual report with a 20-year outlook that identifies transmission and generation development opportunities for a range of market development scenarios.
  • National Transmission Planner. Part of AEMO’s role under the National Electricity Law (NEL) and in accordance with clause 5.20.2 of the National Electricity Rules (NER). Includes publication of a yearly plan for the future of network.
  • O
  • A status point of a Change Request.
  • A type of transaction raised in relation to a Change Request.
  • The number of business days an Objection can remain in MSATS. If the Objection is not withdrawn by the end of the Objection Clearing Period, it is Cancelled by MSATS.
  • A code used in MSATS representing the only grounds on where an Objection can be lodged. For a list of Objection Codes, see the CATS Procedures.
  • The number of business days available to a participant for entering an Objection in MSATS.
  • The rules applicable in MSATS that determine how Objections are used for each Change Reason Code. For more details, see the CATS Procedures.
  • Over-Constrained Dispatch
  • Over-Constrained Dispatch
  • Open Cycle Gas Turbine. An internal combustion engine consisting of a compressor, combustor and power turbine that compresses and ignites an air/fuel mixture to create rotary motion.
  • An End Use Customer within an embedded network who purchases electricity from the EENSP who supplies the electricity.
  • Energy - Generation Dispatch Offer FCAS Offer MNSP - Network Dispatch Offer
  • Any previous FRMP for a NMI.
  • An End Use Customer at a child connection point who purchases electricity from a retailer.
  • A table recording the switching status (On = 1, Off = 0) for each trading interval for unmetered loads associated with a NMI as described in the Metrology Procedure: Part B.
  • A B2B Procedure defining the standard processes and transaction data requirements for one way messaging transactions between market participants. It provides a process where participants can send messages to other participants for multiple NMIs in a single transaction.
  • Other Non-scheduled Generators
  • Operations and Planning Data Management Systems
  • Operations and Planning Data Management Systems
  • Operational Forecasting team within AEMO Operations
  • Non-scheduled Generators smaller than 30 MW and are not PV
  • Operational Transportation Service Agreement
  • P
  • Participant Administrator. Super-users who manage and perform system administration tasks for their own organisation’s participant users.
  • The rights assigned to a PA by the AEMO System Administrator.
  • Project Assessment Conclusion Report. A document published at the end of a Regulatory Investment Test (RIT) process, that assesses project parameters and delivers recommendations.
  • Project Assessment Draft Report. A draft document that identifies a preferred option, outlines feedback received from stakeholders on the PSCR, and seeks feedback from stakeholders on the preferred option before a RIT project can be concluded.
  • The retailer who is the Current FRMP for a parent connection point.
  • The Embedded Network Code populated in the EmbNetParent field in MSATS for a Parent NMI to indicate the NMI is a parent for a specified embedded network.
  • A Service Order Status indicating the Recipient has completed the Primary Work but there are outstanding matters requiring attention.
  • A registered organisation participating in the NEM
  • Contains the data received from AEMO into tables matching the Data Model.
  • Your company's PA set up by AEMO during registration
  • Participant inbox and outbox used by the B2B e-Hub Handler, see B2B Procedures: Technical Delivery Specification.
  • Each Participant ID has secure read-write access to their own set of folders, plus read-only access to folders accessible by all participants (public data). The private folders are for secure transfer of data between the Participant ID systems and AEMO (such as, bidding and settlement invoices).
  • Hardware and software used by a participant to send and receive B2B files, see B2B Procedures: Technical Delivery Specification.
  • Registered participant identifier
  • Where a participant has a role recorded in MSATS with respect to a connection point.
  • An end-user, using AEMO's participant energy market systems to view and retrieve information on behalf of a participant ID. The participant users access rights are created and maintained by the participant ID's Participant Administrator.
  • The user ID you used to login to the system.
  • The initiator of the Reallocation
  • Projected Assessment of System Adequacy
  • Projected Assessment of System Adequacy
  • Participant Current Outstandings
  • Pipeline Capacity Trading. An exchange-based market that allows participants to trade space gas pipeline capacity. It operates as part of the Gas Supply Hub (GSH).
  • Pre-dispatch
  • Participant Data Replication
  • Software responsible for transferring files to and from AEMO's participant file server to the participant's local Data Interchange folders. It can be installed in any environment supporting Java.
  • Software responsible for loading files to and from participant's local Data Interchange folders to the participant's DBMS. It can be installed in any environment supporting Java.
  • Generating units that are relatively expensive to run and generally run only for a few hours per day when the demand is high.
  • A status point of a Change Request.
  • A status point of a Change Request.
  • The 288 periods from 4:30 am to 4:00 am.
  • The value for each trading interval (1-288)
  • Power Factor. Always a number between 0 and 1. Within an AC electric power system, it is defined as the ratio of the real power (P measured in the units MW) flowing to the load, to the apparent power (S measured in the units MVA).
  • Participant ID
  • Power of Choice. A government-led, industry-wide program to provide consumers with more opportunities to make informed choices about the way they consume electricity. PoC was implemented in 2017.
  • Probability of Exceedence
  • Probability of Exceedence
  • Point of presence (in network)
  • Profile Preparation Service: Calculates profile shapes by using algorithms and interval energy data. The calculation of the NSLP or the CLP.
  • Refers to the ability of a party, such as a prospective retailer, to obtain information about a NMI in which it currently does not have an interest. While typically, this may be to obtain information to facilitate quotation and transfer, the policies governing the use of this functionality are determined by jurisdictions and the access and data available is limited based on those policies.
  • 30-minute resolution, up to 40 hours ahead.
  • AEMO’s test system available to participants
  • Refer to old retailer.
  • Refers to the tables, files, and reports deployed in the previous Data Model release.
  • Price per megawatt hour
  • The activity described by the ServiceOrderType field of a Service Order Request.
  • Refers to the create, read, update, and delete actions available to an entity.  These privileges set the actual access rights to the entity, for example the ability to create or edit a participant record as opposed to just viewing rights to the participant record.
  • The create, read, update, delete, or execute privileges assigned to a Right.
  • The likelihood a maximum or minimum demand forecast is met or exceeded
  • Capacity Transfer and Auction Procedures
  • Forward Haul, Back Haul, or Compression transportation products.
  • AEMO’s live system
  • A geographical area comprising a group of one or more TNIs where a single NSLP is calculated. If part of an LNSP local area is located within the local area of another LNSP, that part of the local area of the first LNSP is considered to be part of the profile area of the second LNSP.
  • A code identifying the name of the algorithmically derived shape that is used to allocate a Data stream’s metering data to TIs.
  • Flat: same quantity of energy or cost is applied to all days during the Reallocation period. Business: same quantity of energy or cost is applied to Business Days only during the Reallocation period. Non-business: same quantity of energy or cost is applied for non-business days during the Reallocation period.
  • Use of an algorithm to allocate basic meter readings to each 30 minute trading interval during the meter reading period.
  • The proposed date when a Role transfers from one participant to another.
  • A change to a NMI record that takes effect on a date after the date the Change Request is submitted.
  • A situation where the number of days under consideration occur after the current date.
  • The maximum period when a Prospective Change can be made.
  • Retailer who may initiate a defined B2B process on the basis that they are in the process of applying for responsibility of a given site (using the Customer Transfer process in MSATS).
  • The provision by an MDP of metering data specifically requested by a participant, see B2B Procedures: Meter Data Process.
  • Includes the organisation’s settlement component in the last prudential run (outstandings dollar amount) and the forward exposure. This includes all forward exposure amounts (inclusive of the forward exposure GST amount) attributable to its associated trading participants’ submitted or executed orders or both, and participants’ authorised reallocations, that are entered into since the last initial settlement run.
  • The total estimated prudential exposure across all relevant gas days of the reallocation request. Must not cause the debit participant’s prudential exposure (inclusive of reallocation requests) to exceed its trading limit.
  • Project Specification Consultation Report. The first report in a Regulatory Investment Test (RIT) process, that describes a need and potential options to meet this need.
  • The FTP Put command used to copy files between participant inboxes and outboxes, see B2B Procedures: Technical Delivery Specification.
  • PV systems larger than 100 kW but smaller than 30 MW
  • PV Non-scheduled Generators
  • Q
  • Queensland Curtis LNG. A LNG export facility at Gladstone in Central Queensland.
  • Queensland Gas Pipeline. Pipeline linking the Wallumbilla gas hub in south-central Queensland to large industrial gas users in Gladstone and Rockhampton.
  • Queensland – New South Wales Interconnector. Infrastructure that connects the energy transmission systems of Queensland and New South Wales. It runs between Dumaresq in New South Wales and Bulli Creek in Queensland.
  • The Procedure for Metering Providers, Metering Data Providers and Embedded Network Managers.
  • Referred to as energy offset in the Reallocation Procedures
  • R
  • Roma to Brisbane Pipeline. A transmission pipeline that transports natural gas between the Wallumbilla gas hub, near Roma, and Brisbane and regional centres in between.
  • Reserve Capacity Mechanism. A protocol ensuring that there is sufficient generation capacity in the South West Integrated System (SWIS) by setting a reserve capacity requirement two years ahead. It is unique to Western Australia.
  • The access right to view records represented by an entity.
  • Types of meter readings detailed in the CATS Procedures.
  • A reallocation transaction, as defined in the NER
  • Refers to Reallocation web applications for any Market
  • An authorised request in the Reallocations web application, of an agreement between two market participants to settle all or part of their mutual settlement obligations. The request generates matching debit and credit transactions of equal value that are included in the participants’ settlement statements.
  • Reallocation Request Service
  • Offer Type submitted after the Offer Cut-off Time (12:30 PM the day before the Trading Day
  • Registered Electrical Contractor: A person registered by the relevant safety regulator in each jurisdiction.
  • The receiver of a B2B Transaction or B2B Acknowledgement. This can be either a notification, request for data or request to perform work.
  • The provision of the customer details held by the FRMP for all of their current customers in the DNSP's area at the time of the data extract, see B2B Procedures: Customer and Site Details.
  • The average price for the trading location and gas day to which a reallocation relates.
  • A code in MSATS indicating if a Meter Register is active. For more detail, see the CATS Procedures.
  • Registered participant categories, such as customer, generator, network service provider, trader, reallocator, special participants, market participant, and intending participants.
  • The timing requirement imposed on a service provider by the relevant jurisdictional instrument for the conduct of the regulated service.
  • In the context of a RoLR Event, the AER for the NEM, apart from Victoria, and the Essential Services Commission of Victoria for Victoria.
  • When used in the context of a transaction, indicates that the recipient of the transaction has rejected the transaction using a business acceptance/rejection with an ase: Status of “Reject”, see all B2B Procedures.
  • A status point of a Change Request. Meaning the Change Request failed a validation test in MSATS.
  • The part of the power system security and reliability standards by that name published by the Reliability Panel.
  • A data report that loads into a data model table. Identified by its type, subtype, and version. For example: BILLING,BILLINGASPAYMENTS,2
  • See request/response business transaction pattern.
  • A B2B interaction characterised by one participant sending a request transaction (e.g. ServiceOrderRequest) to another participant and the other participant responding with a corresponding response transaction (e.g. ServiceOrderResponse). In some cases, a notification is sent in response to a request transaction (e.g. a MeterDataNotification providing the metering data requested in a ProvideMeterDataRequest).
  • A status point of a Change Request.
  • The time allowed for the completion of the requested work. This period represents the regulated time frame for the performance of the work requested (where a regulated time frame exists) or an agreed period specified in the relevant B2B Procedures. See B2B Procedures: Service Order Process.
  • The time allowed for the completion of work requested in a Service Order. Can be a Jurisdictional requirement or an agreed period of time.
  • Reliability and Emergency Reserve Trader
  • Reliability and Emergency Reserve Trader
  • A panel of entities recruited by AEMO in accordance with the RERT guidelines that might be called upon to tender for and enter into a reserve contract in Medium Notice Situations and Short Notice Situations.
  • As defined in the NERL.
  • Renewable Energy Target. An Australian government scheme designed to reduce emissions of greenhouse gases in the electricity sector and encourage the additional generation of electricity from sustainable and renewable sources.
  • The person consuming the electricity at the connection point, see B2B Procedures: Service Order Process.
  • The number of procedures that govern the operation of the retail market.
  • The person responsible in the wholesale market for the settlement of electricity supplied to a consumer’s NMI, see MSATS Procedures: CATS Procedures.
  • A change to a NMI record that becomes effective on or before the date the Change Request is submitted.
  • A situation where the days under consideration must either be the date of a Change Request or a date preceding the date of the Change Request.
  • The maximum period where a Retrospective Change can be made.
  • Rights are a collection of entities and their associated access privileges.
  • Batch, interactive, or both.
  • Regulatory Investment Test for Distribution. A regulatory mechanism that applies an economic cost-benefit test on new distribution network investments proposed for the National Electricity Market (NEM).
  • Regulatory Investment Test for Transmission. A regulatory mechanism that applies an economic cost-benefit test on new transmission electricity investments proposed for the National Electricity Market (NEM).
  • Registration Management Client
  • RoLR of Choice: The nomination of a RoLR by an End Use Customer (as classified in s.2 of the National Energy Retail Law) and agreed by the retailer to be its FRMP in a RoLR Event.
  • The role a company has with a connection point in CATS. A single company can have more than one role associated with a NMI.
  • A code used in MSATS to identify the association a participant has with a NMI. For a list of Role Codes, see the CATS Procedures.
  • Retailer of Last Resort. A scheme principally designed to ensure that in the event of retailer failure, arrangements are in place to ensure customers continue to receive electricity and/or gas supply.
  • The first day after the declaration of a RoLR Event. The date when the NMIs where the Failed Retailer was the FRMP are transferred to their RoLR, making the RoLR the FRMP for those NMIs.
  • An event triggering the transfer of End Use Customers to a RoLR.
  • The Jurisdiction affected by a RoLR Event.
  • MSATS participants potentially affected by a RoLR Event include: • Those with a current Role for any NMI where the Failed Retailer was assigned to one or more MSATS roles on the RoLR Effective Transfer Date, including: the Failed Retailer (the current FRMP, LR or both), the Current LNSP, the Current MDP, or the Current MPB. • The RoLR for each RoLR Event Affected NMI. • If the Failed Retailer is a LR, the replacement LR. • Those having a Role for a NMI where at the time of the RoLR Event, the Failed Retailer was nominated as the New FRMP on an incomplete Change Request or MSATS Participants nominated in a new Role on such a Change Request.
  • NMIs where the Failed Retailer was assigned to one or more Roles for the RoLR Effective Transfer Date NMIs where at the time of the RoLR Event, the Failed Retailer was nominated as the New FRMP on a Change Request that is at one of the following status points: Requested, Objected, or Pending Validation.
  • A contact specified in the NEM Retail Operations Contacts List.
  • A review managed by AEMO to assess how a RoLR Event was managed.
  • The period of time from when a RoLR Event occurs to the time a RoLR Post Implementation Review is complete.
  • A system comprising 1 or more photovoltaic (PV) panels installed on a residential or commercial rooftop, converting sunlight to electricity. The capacity of these systems is less than 100 kilowatts (kW)
  • For the purposes of the Metrology Procedure, includes the ongoing and regular maintenance testing, compliance testing and in-service testing of a metering installation initiated by the MC or MP to fulfil their obligations under clause S7.3 of the NER.
  • Responsible person
  • Responsible person
  • Reactive Plant Operator; Generators and Network Service Providers (NSPs) operating reactive plant in accordance with reactive plant dispatch instructions from the AEMO control centres.
  • Regional Reference Node
  • Regional Reference Node
  • Region Reference Price
  • Region Reference Price
  • Regional Scaling Factor
  • NEM Real Time Operations
  • The National Gas or Electricity rules.
  • The run period is the period of time between the declaration deadline and the beginning of the next quarter.
  • S
  • A statement of the sample size to be taken, the frequency of sample testing, and the required accuracy.
  • Supervisory Control and Data Acquisition
  • Supervisory Control and Data Acquisition
  • Same as upper MW limit.
  • An Actual Meter Reading on a Meter Reading date scheduled by the relevant MDP.
  • The date on which a Scheduled Meter Reading has occurred or might occur.
  • See aseXML Schema.
  • Supply and Demand Point Constraints. Contractual, physical and operating limits at system injection or withdrawal points external to Victoria’s Declared Transmission System (DTS). These are applied to both pricing schedules and operating schedules.
  • South East Australia Gas Pipeline. A number of transmission pipelines operating across South Australia.
  • A Controlled Load that is a second-tier load.
  • A Non-Controlled Load that is a second-tier load.
  • End use customers who have transferred to a retailer other than their local retailer.
  • The electricity associated with a second tier NMI is purchased from a retailer other than the local retailer.
  • Stage 1 and stage 2 self-accreditation testing
  • Participant’s 5-minute ahead dispatch self-forecast of unconstrained intermittent generation from a semi-scheduled generating unit
  • Electricity supplied to the grid by scheduled, semi-scheduled, and significant non-scheduled generators, excluding their auxiliary loads, or electricity used by a generator
  • South-East Queensland
  • The Service Level Procedure: Embedded Network Managers.
  • The Service Level Procedure: Metering Data Provider Services. Details the requirements for the systems and processes for the collection, processing, and delivery of metering data by Metering Data Providers.
  • The Service Level Procedure: Metering Provider Services Category B for Metering installation Types 1, 2, 3, 4, 5 and 6. Details the requirements for the provision, installation, and maintenance of metering installations by Metering Providers.
  • A request to perform specified work, see B2B Procedures: Service Order Process.
  • The process of requesting the performance of specified work and receiving notification of the outcome of the request, see B2B Procedures: Service Order Process.
  • A request made by a retailer to a service provider for a defined service to be performed at a connection point, see B2B Procedures: Service Order Process.
  • A B2B Communication in response to a Service Order Request that includes an explanation if the work is incomplete.
  • Paperwork required to carry out certain Service Order Requests. For example: electrical work request or certificate of electrical safety.
  • When used in a B2B Procedure, refers to the DNSP, MDP, or MPB.
  • The Facility Operator’s reference number for the agreement between themselves and Shippers for Capacity Trading.
  • The Facility Operator’s reference number for the agreement between themselves and Shippers for capacity trading.
  • Energy, FCAS, and MNSP
  • RAISE6SEC, RAISE60SEC, RAISE5MIN, RAISEREG, LOWER6SEC, LOWER60SEC, LOWER5MIN and LOWERREG)
  • Where a Participant User has user rights assigned by more than one participant ID, the Participant User can select the participant ID they want to represent using the Set Participant option in the web portals.
  • AEMO prepares a settlement calendar for each of the markets being settled, showing the dates for delivery of statements and settlement of trading amounts relating to each billing period
  • There are four settlement run types: Initial, Final, Revision and Adjustment.
  • An initiative to provide a standard for communications to support smart meters. AEMO has extended AEMO’s e-Hub functionality to support this initiative in line with the B2B Procedure: Technical Delivery Specifications.
  • The ability to switch between different participant IDs, without having to log out, change the ID and password, and log in again. See Setting up Single User IDs.
  • The physical location of the connection point, see B2B Procedures: Customer and Site Details and Service Orders Process.
  • System Outlook for the Market Management System
  • Service Provider (could be different to meter data providers). They provide the telemetry data i.e. behind the NMI data from Batteries.
  • System Performance and Commercial team within AEMO Operations
  • An Actual Meter Reading taken on a date other than a Scheduled Reading Date.
  • A date when a Special Meter Reading is to occur.
  • Settlement Residue Auction. Auctions run by AEMO to sell the rights to the settlements residue associated with inter-regional transfers. Only certain classifications of participants are able to participate in the auctions.
  • System Restart Ancillary Service. The set of contracted restart services procured by AEMO to facilitate the supply of sufficient energy to enable the orderly restart of other (large) generating units.
  • Secure Socket Layer, a protocol for encrypting information over the internet.
  • Short Term Projected Assessment of System Adequacy. A daily load forecast that shows expected demand two to seven days ahead of time.
  • The date the change occurs.
  • Information listed at the top of each Station or Reservoir Data Entry interface. For example:  power station name  category  classification  scheme Static GELF parameters are entered by AEMO and are read-only. If there are any errors or discrepancies in your static GELF parameters, please send an e-mail with the correct information to: gelf@aemo.com.au.
  • Short-term Projected Assessment of System Adequacy 30 minute resolution, seven days ahead.
  • The structured address format containing the following information: • Flat type and flat number • Floor type and floor number • Building name • Location descriptor • House number and suffix • Lot number • Street name and street type • Suburb • Postcode • State
  • Short Term Trading Platform
  • Short Term Trading Platform
  • The 24-month period after the GELF declaration submission deadline.
  • A Bid/Offer submission can have: 1. Multiple Trading Days 2. Multiple DUIDs/LinkIDs 3. All Service Types in the same Submission
  • The submission cut-off date in respect of a gas day is 9.00 am on the 14th business day after the end of the billing period in which that gas day falls. After that time, reallocation request submissions and authorisations for that gas day are no longer accepted.
  • The party submitting a delivered quantity transaction.
  • A process undertaken for the replacement of missing (null) or erroneous accumulated metering data or interval metering data where metering data has failed Validation.
  • System administrator right only assigned to AEMO system administrators.
  • The participant can receive files compliant to the The participant can receive files compliant to the superseded aseXML version, and needs to change over their receiving system before the next aseXML version release.
  • South West Interconnected System. The power system that supplies electricity to south-west Western Australia.
  • South West Pipeline. A pipeline facilitating gas flows from Victoria to South Australia.
  • South-West Queensland Pipe
  • South-West Queensland Pipe
  • The AEMO system administrator who maintains the PA right.
  • T
  • Fast Start Time at Zero in minutes. Only relevant to Service type, Energy.
  • Fast Start Time to Minimum Load in minutes. Only relevant to Service type, Energy.
  • Fast Start Time at Minimum Load in minutes. Only relevant to Service type, Energy.
  • Only relevant to Service type, Energy. Fast Start Time to Zero in minutes.
  • Typical Accural
  • Typical Accural
  • The B2B Procedures: Technical Delivery Specification. Defines the technical requirements for communicating B2B messages between participants using the MSATS B2B Handler or contingency systems.
  • Refers to the B2B Procedures: Technical Guidelines for B2B Procedures.
  • Tasmanian Gas Pipeline. A pipeline supplying national gas from Longford in Victoria, under the Bass Strait, to Bell Bay in Tasmania.
  • Total Harmonic Distortion. A measurement used in power systems of how much of the distortion of a voltage or current is due to harmonics in the signal.
  • Trading Interval
  • Trading Interval
  • A site where the FRMP is the LR. This could be the case where: • The End Use Customer has transferred back to the LR as their retailer (FRMP) after a period with another retailer. • The site is not contestable. • The site is contestable but the End Use Customer has not transferred to another retailer. See also first-tier controlled load.
  • A site where the FRMP is not the same as the LR. This could be the case if: • A contestable End Use Customer has elected to transfer from the LR. • An End Use Customer signed a contract with a retailer other than the LR prior to the connection point being established in the MSATS System and it was created as a Tier 2 Site. See also second-tier controlled load.
  • As described in the CATS Procedures, the rules allocating the number of business days to the following categories: • Objection Logging Period. • Objection Clearing Period. • Retrospective Period. • Prospective Period.
  • Period between two timing points.
  • Point in time when an activity occurs.
  • The timing points when an activity must be initiated or an activity completed.
  • Transmission Loss Factor
  • Transmission Loss Factor
  • Transmission Node Identifier. The code the relevant transmission node that identifies the transmission loss factor and/or transmission use of system charge for the connection point.
  • Transmission Node Identity: A four character alpha-numeric code used to identify a virtual transmission node or transmission network connection point.
  • Transmission Network Service Provider
  • Transmission Network Service Provider
  • The resulting positive or negative dollar amount of a Reallocation
  • Equivalent to a trading day under the Rules.
  • A GSH registered trading participant associated with an organisation having a participant ETS code.
  • SRA procedures term
  • An aseXML realisation of a business acceptance/rejection.
  • The transaction group field in an aseXML Message, see B2B Procedures: Technical Delivery Specification.
  • An aseXML realisation of a business document.
  • The physical exchange of B2B messages to complete a B2B interaction.
  • An element in an aseXML message allowing the sender to indicate their preference in terms of timeliness of processing for the message contents. The three allowable values are “High”, “Medium” and “Low”. As used in terms such as Medium Priority or Low Priority.
  • As described in the CATS Procedures, a code used in MSATS to identify a need to change CATS Standing Data.
  • Exchange or Delivery
  • Transmission Use of System Charge. Charge levied by transmission asset owners to recover costs for the provision of shared network services.
  • U
  • Unaccounted For Gas. The difference between the measured quantity of gas entering the gas distribution system from various supply points and the gas delivered to customers.
  • Unaccounted For Energy. The difference between metered injected gas supply, and metered and allocated gas at delivery points, it comprises gas losses, metering errors, timing, heating value error, allocation error, and other factors.
  • Underground Gas Storage. A storage plant that pumps excess supply underground, so that the gas can then be extracted for later use.
  • Unconstrained Intermittent Generation Forecast
  • Unconstrained Intermittent Generation Forecast
  • Unmetered Connection Point. Connection points, such as street lights and traffic lights, that don’t need an electricity meter because the usage is predictable and can be calculated without a meter.
  • An Unmetered Device operating 24 hours per day and has a variable load over a repeated operating cycle (e.g. traffic signal, where applicable).
  • A semi-scheduled generating unit or a non-scheduled generating unit
  • A semi-scheduled generating unit or a non-scheduled generating unit
  • Any electricity-consuming device installed at or near a connection point that is unmetered, and the load consumed at that connection point is a market load. There are two types of Unmetered Devices: Controlled Unmetered Devices and Uncontrolled Unmetered Devices.
  • Guidelines for unmetered loads.
  • The consumption volume calculated for loads that have no meter (e.g. street lighting etc). Unmetered metering data for unmetered supply is submitted to MSATS as interval data (i.e. as if it was an interval type of metering installation).
  • An address with the following format: • A string of text characters with a maximum length of 80 per line. • A maximum of 3 lines.
  • The access right to update records represented by an entity.
  • MW Limit restriction, indicating when a facility is down regulated. An MW limit is applied in the Unit’s control system to limit its MW output to below maximum capacity.
  • User Rights Management; see the Guide to URM on AEMO's website
  • The method of identifying a given data stream’s consumption in terms of its contribution to the overall sum of profile loads for a given date range.
  • Unserved Energy. The amount of energy that cannot be supplied because there is insufficient generation capacity, demand-side participation, or network capability to meet demand.
  • Rights are a collection of entities and their associated access privileges. A right consists of information about various actions that an owner of a right can perform on each entity in the system. PAs can create and edit rights and allocate them to participant users in their company.
  • The Right a PA assigns to Participant Users to allow access to different areas of MSATS.
  • V
  • Metering data that has passed Validation.
  • A process to test the veracity and integrity of metering data.
  • The value of the Reallocation for each Agreement Type (1-48)
  • Victorian Annual Planning Report. A plan that considers the adequacy of the Victorian transmission network to meet its reliability and security requirements, and identifies development opportunities to address emerging network limitations.
  • Volt-Ampere reactive power, relating to voltage control in the power system
  • GELF declarations entered into the Station or Reservoir Data Entry interface grids. Variable GELF parameters are the GELF declarations entered by participants. For example: Station declarations:  Inflexible Outages  Energy or capacity capability subject to GELF Reservoir declarations:  Initial and monthly reservoir limits  Inflows by rainfall scenarios.
  • Value of Customer Reliability. Represents a customer's willingness to pay for the reliable supply of electricity.
  • VAr Dispatch Scheduling; the system that produces instructions for reactive plant
  • Victorian Gas Planning Report. A plan providing an assessment of supply and demand, and pipeline capacity adequacy for the Victorian Declared Transmission System (DTS) over the next five years.
  • A meter installed in Victoria as part of the Advanced Metering Infrastructure mandate.
  • Value of Lost Load. A monetary indicator expressing the costs associated with an interruption of electricity supply.
  • Virtual Private Network
  • Virtual Power Plant
  • Virtual Power Plant
  • Variable Renewable Energy. Renewable energy that fluctuates, such as solar or wind.
  • Voltage transformer
  • W
  • Western Australia Gas Bulletin Board (WA). A public website that publishes forecast and historical data on the domestic production, transmission, storage and usage of natural gas in WA.
  • Western Australia Gas Statement of Opportunities (WA). An annual report that provides forecasts of WA domestic gas demand and potential supply over a 10-year period, including an overview of gas infrastructure and emerging issues.
  • Wallumbilla spread product
  • The single trading location in the Gas Supply Hub (GSH).
  • The transfer of aseXML transactions between participant gateways and the AEMO's market systems.
  • Wholesale Electricity Market (WA). A wholesale electricity market supplying energy to south-west Western Australia. It operates on the South West Interconnected System (SWIS).
  • Wholesale Electricity Market (WA). A wholesale electricity market supplying energy to south-west Western Australia. It operates on the South West Interconnected System (SWIS).
  • Connection points located at the transmission node representing bulk supply feeders to a distribution network, interconnectors, and generation points.
  • A period of time constituting a day for the purposes of wholesale settlement. It is a 24 hour period beginning and ending at midnight Eastern Standard Time (EST).
  • Wholesale, Interconnector, Generator and Sample procedures contain the principles that govern the transfer of consumer settlements, the registration of metering installation, and management of standing data for NMIs that are classified as wholesale, interconnector, generator or sample.
  • Wholesale, Interconnector, Generator and Sample procedures contain the principles that govern the transfer of consumer settlements, the registration of metering installation, and management of standing data for NMIs that are classified as wholesale, interconnector, generator or sample.
  • MSATS Procedures: Procedure for the Management of Wholesale, Interconnector, Generator and Sample (WIGS) NMIs.
  • Western Transmission System. Transports gas to Portland, Hamilton and Cobden.
  • X
  • eXtensible Mark-up Language.
  • Z
  • A file containing business data with filename extensions of .zip, are compressed, and contain one file with a filename extension of .XML. The XML file contains the XML coded message data.
  • The file compression format used for exchanging data with AEMO.