Procedures

Current versions of the Wholesale Electricity Market (WEM) market procedures can be found on this page.

  • Administrative market procedures
    Name Description Related Rules Latest update
    Information Confidentiality This Procedure outlines setting the confidentiality status for market-related information and documents produced or exchanged under the Market Rules or Procedures. 2.37.4, 3.2.4, 7.13.1, 10.2.1, 10.2.7 30 November 2015
    Data and IT Interface Requirements WEM Procedure The purpose of this Procedure is to document the data and IT interface requirements, including security standards in respect of systems required for Market Participants to operate in the Wholesale Electricity Market (WEM). 2.36.5 29 July 2021
    Monitoring and Reporting Protocol This Procedure sets out how AEMO will implement its obligations under the WEM Rules to support the Economic Regulation Authority (ERA) in monitoring Rule Participants’ behaviour for compliance with the WEM Rules and the Market Procedures developed by AEMO. 2.15.6A, 2.15.6B, 2.15.6C 22 May 2019
    Notices and Communications This Procedure documents the method by which notices and communications required under, contemplated by or relating to, the WEM Rules are to be given to or by AEMO. 1.6.2 01 October 2017
  • DER market procedures
    Name Description Related Rules Latest update
    DER Register Information Procedure This Procedure specifies the obligations of AEMO and Network Operators in relation to the submission, storage and reporting of data for the DER Register. 3.24.8 1 July 2020
  • Market operations market procedures
    Name Description Related Rules Latest update

    Consumption Deviation Applications    

    This Procedure covers the process and information required for a Market Participant to submit a Consumption Deviation Application, and the process AEMO must follow when assessing an application. 4.26.2CB, 4.26.2CC, 4.26.2CD, 4.26.2CF, 4.26.2CG  1 October 2019
    Capacity Credit Allocation Procedure  This Procedure covers the process and information required for a Market Participant to make a Capacity Credit Allocation Submission. 9.4.3, 9.4.17, 9.4.18 16 September 2021
    Facility Registration, De-Registration and Transfer Procedure  This Procedure covers the process for a Rule Participant to register, de-register or transfer its Facilities and the process to be applied by AEMO in processing applications. 2.31.23, 2.30.11, 2.30A.6 19 March 2021 
    Intermittent Load Refund Procedure This procedure outlines the process by which Intermittent Loads will be subject to Reserve Capacity Refunds. 4.28A.3 18 April 2017
    Determining Loss Factors This Procedure covers the process for determining Loss Factors. 2.27.15, 2.27.17, 3.2.6, 3.2.7 1 July 2019
    Meter Data Submission Procedure This Procedure covers how Meter Data Agents submit Meter Data to AEMO, including the timing and format of submissions. 8.6.2 30 November 2015
    Rule Participant Registration and De-Registration Procedure   This Procedure outlines the process for new participant registration and existing Market Participant de-registration. 2.31.23 18 April 2017
    Prudential Requirements Procedure This Procedure outlines how AEMO will manage liabilities that arise in the Settlement process. 2.37.4, 2.37.7, 2.37.8, 2.38.3, 2.40.1, 2.41.5, 2.42.4, 2.43.1 24 August 2020
    Settlement Procedure  This Procedure outlines the financial settlement of trading through the WEM. 9.2.1 16 September 2021             
    Balancing Facility Requirements Procedure This Procedure outlines the technical communication criteria that a Balancing Facility, or a type of Balancing Facility must meet. 3.2.2, 7A.1.6 1 July 2019
    Balancing Market Forecasts Procedure This Procedure outlines the information requirements from System Management to enable the Forecast Balancing Merit Order and Balancing Forecast to be prepared. 7A.3.3, 7A.3.4, 7A.3.15, 7A.3.19, 7A.3.20, 7B.3.3 1 July 2019
    Individual Reserve Capacity Requirements This Procedure documents the processes to be followed by:
    a) Market Customers in providing information relating to their loads and demand side management arrangements for the determination of their IRCR on an annual basis and/or on a monthly basis.
    b) AEMO in requesting information from Market Customers in respect of determination of the yearly IRCR and in calculating and publishing the Monthly IRCR.
    4.28.12 01 October 2019
  • Dispatch and Planning Procedures
    Name Description Related Rules Latest Update
    Ancillary Services
    (pdf, 443 KB)  
    This Procedure sets out the procedure to be followed: by AEMO when determining Ancillary Service Requirements and entering into Ancillary Service Contracts; any technical and communication criteria that an LFAS Facility, or a type of LFAS Facility, must meet, and the procedure to be followed by AEMO, Market Participants, Ancillary Service Providers and Network Operators where the WEM Rules require Ancillary Services to be provided 3.2.2, 3.3.3, 3.11.14, 3.11.15, 7B.1.2  1 July 2019
    Commissioning Tests
    (pdf, 78 KB)  
    This Procedure sets out the requirements that System Management and Market Participants must follow when planning and conducting tests of a generating system to verify its output. 3.21A.15  1 June 2019
    Communications and Control Systems 
    (pdf, 387 KB)  
    The purpose of this Procedure is to describe the communication and control system requirements necessary to support the dispatch process and enable AEMO to remotely monitor the performance of the SWIS, the high-resolution time synchronised data requirements necessary to enable AEMO to Accredit a Facility’s Frequency Co-optimised Essential System Services capability, monitor a Facility’s Frequency Co-optimised Essential System Services response, monitor a Facility’s compliance with its Registered Generator Performance Standards, investigate incidents on the SWIS that impact Power System Security or Power System Reliability or market operation and any other matter for which high-resolution time stamped data, where available, may assist with monitoring the performance of the SWIS, the minimum standards and specifications of the communication and measuring information; the manner in which communications data and measuring information is to be provided to AEMO; and any other relevant matters required for AEMO to perform its obligations in respect of section 2.36A of the WEM Rules.  2.34A.13(a)(iv), 2.34A.13(a)(v), 2.35.4, 2.36A.1, 2.36A.2, 2.36A.3, 2.36A.4, 2.36A.4A, 2.36A.5.(a), 2.36A.5.(b), 2.36A.5.(c), 2.36A.5.(d), 2.36A.5.(e), 2.36A.6  1 October 2021
    Credible Contingency Events WEM Procedure
    (pdf, 799 KB)    
    The purpose of this Procedure is to set out the process for determination and classification of Credible Contingency Events, the Contingency Reclassification Conditions, the factors that AEMO may take into account in reclassifying a Contingency Event in accordance with clause 3.8A, the process for reclassifying a Non-credible Contingency Event as a Credible Contingency Event, the procedures for notifying affected Rule Participants under clause 3.8A.7, including the time by which a notification must be given and a description of the Contingency Events that are generally considered as Credible Contingency Events, taking into consideration relevant requirements in the Technical Rules of the relevant Network Operator. 3.8A.4(a), 3.8A.4(b), 3.8A.4(c), 3.8A.4(d), 3.8A.4(e), 3.8A.4(f), 3.8A.6(b), 3.8A.7 29 July 2021
    Dispatch
    (pdf, 570 KB)  
    This Procedure sets out the processes that Rule Participants must follow to meet dispatch requirements specified in the WEM Rules. 3.21B.5, 3.21B.8, 4.11.1, 7.2.5, 7.6.10, 7.6.10A, 7.6.13, 7.6A.2, 7.6A.7, 7.6A.8, 7.7.4A, 7.7.5A, 7.7.5B, 7.7.5C, 7.7.6, 7.7.9, 7.9.19, 7.13.1, 7.13.1C, 7.13.3, 7.13.5, 7A.3.7, 7A.3.7A, 7A.3.15, 7B.1.4 1 July 2019
    Generator Monitoring Plans
    (pdf, 1.4 MB)  
    The purpose of this Procedure is to document the requirements in a Template Generator Monitoring Plan; the process by which a Market Participant must submit a proposed Generator Monitoring Plan for a Transmission Connected Generating System, the process by which a Market Participant must submit proposed updates and amendments to a Generator Monitoring Plan previously approved by AEMO, the process by which AEMO must assess and approve a Generator Monitoring Plan proposed by a Market Participant; and updates and amendments to a proposed Generator Monitoring Plan approved by AEMO, the tests that a Facility must conduct in order to demonstrate compliance with its Registered Generator Performance Standards and Generator Monitoring Plan, and the process by which a Market Participant must report any alleged non-compliance or suspected non-compliance with: applicable Registered Generator Performance Standards, an applicable approved Generator Monitoring Plan or an approved Rectification Plan.  1.41.6(a), 1.41.6(b), 3A.6.2(a)(i), 3A.6.2(a)(ii), 3A.6.2(a)(iii), 3A.6.2(b), 3A.6.2(c), 3A.6.2(d), 3A.6.2(e), 3A.9.1(a), 3A.9.1(b), 3A.9.4. 1 February 2021
    Facility Outages
    (pdf, 372 KB)  
    This Procedure sets out the processes that Rule Participants must follow when conducting outage planning for a Facility, when conducting final approval of outages, when determining and reporting Forced Outages and Consequential Outages, and that AEMO must follow when calculating Planned Outage and Forced Outage rates for the purposes of assigning Certified Reserve Capacity. 3.18.15, 3.18.21, 3.19.10, 3.19.14, 3.21.12, 4.11.1  1 February 2020

    Frequency Co-optimised Essential System Services Accreditation (pdf, 1.1 MB)

    The purpose of this Procedure is to describe the processes for accreditation for a Frequency Co-optimised Essential System Service (FCESS), the FCESS Performance Requirements and Accreditation Parameters, RoCoF Ride-Through Capability accreditation, setting the RoCoF Ride-Through Cost Recovery Limit and transitional processes for the accreditation of FCESS.  1.49.5, 1.49.4, 1.49.1, 1.49.2, 2.34A.13.  1 October 2021
    IMS Interface
    (pdf, 480 KB)  
    This Procedure sets out the reasonable arrangement by which Network Operators and AEMO must provide each other with information under WEM Rules. The proposed amendments relocate content to the Power System Operation Procedure: Communications and Control Systems. 2.13.6A, 2.15.6A, 2.28.3A, 2.36A.1, 2.36A.5, 3.2.2, 3.2.4, 7.13.1, 7A.3.7, 7A.3.7A 1 July 2019
    Medium Term PASA
    (pdf, 90 KB)
    This Procedure sets out the procedures System Management and Rule Participants must follow in the preparation and publishing of the Medium Term PASA. 3.16.4, 3.16.7, 3.16.8A, 3.16.10 1 June 2019
    Network Modelling Data
    (pdf, 300 KB)  
    This Procedure specifies the information that a Network Operator must provide to System Management for each of its Networks, the processes to be followed by Network Operators and AEMO, and the technical and communication criteria that must be met. 3.2.2, 3.2.4, 3.2.6, 3.2.7, 3.3.3, 3.4.9, 3.5.11 13 October 2017
    Power System Security
    (pdf, 413 KB)  
    This Procedure sets out the processes AEMO must follow to maintain Equipment Limit information, AEMO and Network Operators must follow when determining Security Limits and maintaining Security Limit information, AEMO must follow when establishing and modifying the Technical Envelope and AEMO must follow to ensure the SWIS operates according to the Technical Envelope applicable to each SWIS Operating State, and guidelines describing matters AEMO will consider when determining the SWIS Operating State.   3.2.2, 3.2.4, 3.2.6, 3.2.7, 3.3.3, 3.4.9, 3.5.11  1 July 2019
    Short Term PASA
    (pdf, 92 KB)
    This Procedure sets out the procedures that System Management and Market Participants must follow in the preparation of the Short Term PASA. 3.17.10  1 June 2019 
    Tolerance Ranges
    (pdf, 183 KB)  
    This Procedure documents the process for determining and reviewing the annual Tolerance Range and any Facility Tolerance Ranges.   2.13.6K, 3.2.2, 3.3.3  21 April 2018 
  • Reserve capacity market procedures
    Name Description Related Rules Latest update
    Electric Storage Resource Obligation Intervals WEM Procedure The purpose of this Procedure is to document the processes to be followed by AEMO for determining the Trading Intervals that will be classified as Electric Storage Resource Obligation Intervals in a Trading Day, the processes to be followed by AEMO for publishing the Trading Intervals classified as Electric Storage Resource Obligation Intervals on the WEM Website, the circumstances, if any, that allow AEMO to amend the Trading Intervals classified as Electric Storage Resource Obligation Intervals and the obligations on AEMO to consult with Market Participants.  4.11.3A(c)(i), 4.11.3A(c)(ii), 4.11.3A(c)(iii), Chapter 11 definition: Electric Storage Resource Obligation Duration  1 July 2021
    Facility Sub-Metering WEM Procedure The purpose of this Procedure is to outline the characteristics and requirements of Facility Sub-Metering, including accuracy requirements; the procedures to be followed by Market Participants for auditing of Facility Sub-Metering, the communication requirements and protocols between a relevant Market Participant and AEMO, the processes to be followed by a Market Participant for providing Facility Sub-Metering information to AEMO and any other matters which AEMO considers relevant.  2.29.12, 2.29.13, 2.29.14, 2.29.15.(a), 2.29.15.(b), 2.29.15.(c), 2.29.15.(d), 4.9.3, 4.13.10B, 4.25, Appendix 9  1 July 2021
    Certification of Reserve Capacity This Procedure documents the process Market Participants must follow in applying for Certified Reserve Capacity or Early Certified Reserve Capacity, and AEMO must follow in processing those applications, including to assign Certified Reserve Capacity, set Reserve Capacity Obligation Quantities, and approve Early Certified Reserve Capacity. 4.9.3, 4.9.10, 4.11.1, 4.28C.15 15 June 2020
    Declaration of Bilateral Trades and the Reserve Capacity Auction This Procedure covers how Rule Participants propose the level of Certified Reserve Capacity intended to be traded bilaterally and how AEMO processes the declaration and assigns Certified Reserve Capacity. 3.2.6, 4.14.11, 4.17.9 16 Oct 2020
    Reserve Capacity Performance Monitoring This Procedure details the requirements and processes for determining the performance of the market with regard to Reserve Capacity. 4.27.5, 4.27.12 01 Oct 2017
    Reserve Capacity Security This Procedure outlines how Market Participants holding Certified Reserve Capacity must submit Reserve Capacity Security. 2.1A.2,
    4.13.8,
    4.13A.23
    1 July 2020
    Reserve Capacity Testing  This Procedure details the steps to be followed by AEMO and Market Participants in performing Reserve Capacity Tests. 2.1A.2(h), 2.9.7, 2.9.7A, 2.9.8, 4.25.14 1 October 2021
    Treatment of Small Generators This Procedure describes the process for assigning Capacity Credits to New Small Generators. 4.28B.9 30 Nov 2015
    Undertaking the LT PASA and conducting a review of the Planning Criterion This Procedure documents the process by which AEMO conducts the Long Term PASA and the review required under clause 4.5.15 of the WEM Rules. 4.5.14, 4.5.16 01 Oct 2017
    Supplementary Reserve Capacity This Procedure describes the process that AEMO and System Management must follow in acquiring Eligible Services, entering into the Supplementary Capacity Contract, and determining the Maximum Contract Value per hour of availability for any Supplementary Capacity Contract. 4.24.18 18 Apr 2017
    Indicative Facility Class and RCM Facility Class Assessment WEM Procedure The purpose of this Procedure is to document the processes to be followed by AEMO in determining and assigning an indicative Facility Class and an indicative Facility Technology Type to a new facility or facility upgrade under clause 4.8A or an unregistered facility under clause 1.45.9, the processes to be followed by AEMO in determining and assigning an RCM Facility Class and Facility Technology Type to a Registered Facility under clause 1.45, the information required to be provided in support of an application under clause 4.8A.3, the processes to be followed by an applicant in relation to making an application under clause 1.45.4, 1.45.8 or 4.8A.3 and any other matters AEMO considers relevant. 4.8A.1(a), 4.8A.1(b), 4.8A.2, 4.8A.3, 4.8A.5(a), 4.8A.5(b), 4.8A.5(c), 4.8A.6, 4.8A.7(a), 4.8A.7(b), 4.8A.7(c), 4.8A.7(d), 1.45.4, 1.45.5, 1.45.6, 1.45.8, 1.45.9 29 July 2021

Other Market Procedures

Economic Regulation Authority Market Procedures can be found here.

Rule Change Panel Market Procedures can be found here, with details of changes to those procedures available here.

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