WEM 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
    Monitoring and Reporting Protocol The purpose of this Procedure is to set out: how AEMO will carry out its obligations to monitor Rule Participants' behaviour for compliance under clause 2.13.7; how AEMO will carry out its obligations to support the Economic Regulation Authority under clauses 2.13.4, 2.13.8 and 2.13.9; the notification and reporting processes that AEMO will use to notify the Economic Regulation Authority under clause 2.13.14 and 2.13.15; the situations where AEMO considers it does not need to notify the Economic Regulation Authority of an alleged breach under clause 2.13.14; and any other matters relevant to AEMO’s obligations in section 2.13.
    2.15.4(a), 2.15.4(c), 2.15.4(d), 2.15.4(e), 2.15.4(f),
    1 October 2023
    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. It also sets out the conditions under which AEMO may declare an Emergency Operating State and provides a description of events that AEMO would consider significant for the purposes of clause 7.11.5(j). 
    1.6.2, 3.5.1A, 7.11.8
    1 October 2023
    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
  • 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 2 October 2023
  • Market operations market procedures
    Name Description Related Rules Latest update
    Dispatch Settlement and Monitoring Data
    The purpose of this Procedure is to: document the procedure to be followed by Rule Participants in providing settlement and monitoring data to AEMO; and specify: the methods that AEMO will use to determine estimates under clause 7.13.6; the process of revising an estimate under clause 7.13.7; and the information that a Market Participant must provide to AEMO for each of the Market Participant’s Registered Facilities to support the preparation of estimates under clauses 7.13.6 and 7.13.7.
    7.13.3, 7.13.8(a), 7.13.8(b), 7.13.8(c)
    1 October 2023
    Capacity Credit Allocation Procedure
    The purpose of this Procedure is to document the Capacity Credit Allocation process and any other matters required by sections 4.30 and 4.31 of the WEM Rules.
    4.30.12 
    1 October 2023
    Determination of Market Schedules
    The purpose of this Procedure is to document the processes for determining Market Schedules.
    7.8.9
    1 October 2023
    Identification of Affected Dispatch Intervals
    The purpose of this Procedure is document procedures for the automatic identification of Affected Dispatch Intervals, and the conditions or circumstances that would identify a Dispatch Interval as an Affected Dispatch Interval.
    7.11C.1
    1 October 2023
    Meter Data Submissions
    This Procedure covers how Meter Data Agents submit Meter Data to AEMO, including the timing and format of submissions.
    8.6.2
    1 October 2023 
    Real Time Market Timetable
    This Procedure documents the Real-Time Market Timetable.
    7.1.2(a), 7.1.3
    1 October 2023
    Rule Participant Registration Processes
    The purpose of this Procedure is to document the criteria AEMO will use to determine whether or not to exempt persons from Rule Participant registration requirements in sections 2.28 and 2.30B, the processes to be followed by a person in applying for an exemption in respect of Rule Participant registration under sections 2.28 and 2.30B, the processes to be followed and criteria to be applied by AEMO in assessing, determining or revoking an exemption in respect of Rule Participant registration under sections 2.28 and 2.30B and the processes that AEMO and other Rule Participants, as applicable, must follow regarding Rule Participant registration.
    2.31.25(a), 2.28.21
    1 October 2023
    WEM Submissions
    This Procedures specifies the Real-Time Market Acceptance Horizon, and documents processes relating to Real-Time Market Submissions and DSP Withdrawal Profiles Submissions. 7.4.21, 7.4.38, 7.4.57A, 7.4.62, 7.4A.12, 7.4A.20, 7.4A.24
    1 October 2023
    Settlements
    The purpose of this Procedure is to describe the settlement processes for publishing the Settlement Timeline; calculating the Metered Schedule and settlement amounts, performing the Adjustment Process, providing Settlement Statements and Invoices, payment of Invoices, settlement in Payment Default situation, including Default Levies, settlement in Repaid Amount situation, including Repaid Amount Levies, the application of taxes and interest to settlement transactions, the collection and distribution of Financial Penalties and the processes to be followed in relation to Notices of Disagreement and Notices of Dispute.
    9.2.1, 9.2.2
    1 October 2023
    Individual Reserve Capacity Requirements
    The purpose of this Procedure is to describe the processes to be followed in calculating Indicative Individual Reserve Capacity Requirements and Individual Reserve Capacity Requirements.
    4.28.12
    1 October 2023
    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
    4.26.2CE, 4.28.9E
    1 October 2023
    Adjustment of Real-Time Inputs
    The purpose of this Procedure is to document the information and processes, including the application of any formulae, AEMO will use in making a determination under clause 7.4.52 and the circumstances in which AEMO will adjust the inputs specified in clause 7.4.52.
    7.4.53
    1 October 2023
    Prudential Requirements 
    The purpose of this Procedure is to describe the processes for: determining Credit Limits; assessing persons against the Acceptable Credit Criteria; Credit Support arrangements, including: the form of acceptable guarantees and bank letters of credit; where and how AEMO will hold Security Deposits and how the costs and fees of holding Security Deposits will be met; the circumstances that may require Credit Support to be replaced for the purposes of clause 2.38.3; and the application of monies drawn upon from Credit Support in respect of amounts owed by the relevant Rule Participant to AEMO; calculation of Trading Margins; the list of factors to be taken into account for assessing the expected value of transactions; issuing of Margin Calls; and other matters relating to clauses 2.37 to 2.42.
    2.43.1
    1 October 2023
    Transitional Registration Processes
    The purpose of this Procedure is to document the information to be provided to AEMO, and the processes and timeframes a Market Participant must adhere to, when applying to AEMO for an assessment under clauses 1.47.4, 1.47.7 or 1.47.8, the process and timeframes AEMO must adhere to when conducting an assessment and assigning a Facility Class to a facility in respect of an application made under clauses 1.47.4, 1.47.7 or 1.47.8, which must take into account the Facility Technology Types comprising a facility, the process and timeframes AEMO and Market Participants must adhere to with respect to consultations and requests under clause 1.47.10, any other matters AEMO considers relevant to clause 1.47 and the manner in which the Standing Data referred to in clause 1.54A.2(a) is to be provided to AEMO. 
    1.47.12, 1.54A.2(b) 
    1 June 2023 
    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 
    Settlement Procedure
    This Procedure outlines the financial settlement of trading through the WEM.
    9.2.1 
    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
    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
    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
    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
  • Dispatch and Planning Procedures
    Name Description Related Rules Latest Update
    Outages
    The purpose of this WEM Procedure is to outline the processes for the submission, evaluation and approval of Outage Plans, including applicable timelines, which must include a requirement for AEMO to notify a Market Participant or Network Operator where AEMO determines that an Outage Plan or Planned Outage is at risk of rejection, or the Outage Facility is recalled to service from a Planned Outage; the circumstances where a Facility has failed to comply with a Dispatch Instruction for the purpose of clause 3.18.3(f), which should also include where the Facility has a delayed response to a Dispatch Instruction; any requirements for Rule Participants to notify or seek consent to commence or complete an Outage, including any relevant processes to be followed where the Facility or item of equipment is being taken out of service, or returned to service; Outage coordination, which must include: for the purposes of clause 3.18C.3, specifying the matters to be considered when determining whether an Impacted Participant has been unduly impacted by the Outage Plan of an Impacting Participant and the processes and any other matters referred to in clause 3.18C.12; information requirements for processes relating to Outages, including, but not limited to: minimum information requirements for an Outage Plan and any other supporting information that may be used by AEMO to evaluate or assess an Outage Plan; forecast assumptions and the methodology to be used for Outage Evaluations, which may differ across evaluation timeframes; the methodology for assessing whether there would be a shortfall of available accredited capacity to provide Essential System Services if an Outage Plan is approved; publication of Outage-related information, which must include the information in clauses 3.22.1, 3.22.1A and 3.22.2; any other matters relating to clauses 3.18 and 3.18A to 3.21; and reporting Forced Outages, including the determination of Forced Outage quantities pursuant to clause 4.26.1J.
    3.18.4, 3.18C.12, 3.18E.10, 3.21.10
    1 October 2023
    Commissioning Tests
    The purpose of this Procedure is to document a description of the activities that AEMO consider would constitute a Commissioning Test, and therefore require submission of a Commissioning Test Plan under this section 3.21A, including a categorisation of the type of Commissioning Test or Commissioning Test Plan that AEMO reasonably considers would allow a Market Participant to determine the timeframes and processes applicable to a Commissioning Test Plan or Commissioning Test, any additional information required to be contained in a Commissioning Test Plan, the timelines for submitting and revising different categories of Commissioning Test Plans to AEMO, where the timelines must be no longer than 65 days, the criteria AEMO will use to assess whether to approve or reject a Commissioning Test Plan and to stop, reschedule or cancel a Commissioning Test in a Commissioning Test Plan; the process for notifying whether the Commissioning Test Plan has been rejected, approved, stopped, rescheduled or cancelled, the process for rescheduling a Commissioning Test within the Commissioning Test Period, including the process for Market Participants and AEMO to agree to a new date and time for the Commissioning Test, the process and timeframes for adjustments to an approved Commissioning Test Plan, including to the Commissioning Test Period, the summary details of a Commissioning Test Plan that AEMO will publish on the WEM Website and the requirements for undertaking a Commissioning Test, including, without limitation, any actions to be taken by a Market Participant before, during and on completion of the Commissioning Test.
    3.21A.27
    1 October 2023
    Constraint Formulation  The purpose of this Procedure is to document (with respect to Constraint Equations that are not Preliminary RCM Constraint Equations or RCM Constraint Equations): the processes to be followed by AEMO and the matters it must consider in formulating and, where applicable, updating Constraint Equations, (including RCM Constraint Equations), including: the approach to be taken by AEMO in applying: an Operating Margin; and the principles described in clause 2.27A.9; and the conventions for assigning a unique identifier to Constraint Equations and Constraint Sets; the processes to be followed and the methodology to be used by AEMO in determining Constraint Equation terms and coefficients for Network Constraints, including the methodology for determining whether the exclusion of a variable from a Fully Co-optimised Network Constraint Equation would have a material effect on Power System Security due to the size of its coefficient; the processes to be followed and the methodology to be used by AEMO in selecting one or more Constraint Equations to represent a Network Constraint, including in respect of the location of terms on each side of the Constraint Equation; the processes and timeframes to be followed by AEMO for creating new Constraint Equations and Constraint Sets in response to a Non-Credible Contingency Event; and any other processes or procedures relating to Constraints or Network congestion that AEMO considers are reasonably required to enable it to carry out its functions under the WEM Rules.  2.27A.10(b)(i)(1), 2.27A.10(b)(i)(2), 2.27A.10(b)(ii), 2.27A.10(cA), 2.27A.10(cB), 2.27A.10(cC), 2.27A.10(d),
    1 October 2023
    Limit Advice Requirements
    The purpose of this Procedure is to document: in respect of the information to be provided by a Network Operator to AEMO under clause 2.27A.2: the information and data to be provided by each Network Operator to AEMO; and the processes to be followed for the provision of and, where applicable, updates to such information and any other information referred to in clause 2.27A.4, from each Network Operator to AEMO, including: the format, form and manner in which such information must be provided; and where these WEM Rules do not provide a timeframe for the provision of such information to AEMO, the reasonable times by which such information must be provided having regard to the scope and nature of the information to be provided; any other processes or procedures relating to Constraints or Network congestion that AEMO considers are reasonably required to enable it to carry out its functions under the WEM Rules.
    2.27A.10(a)(i), 2.27A.10(a)(ii)(1), 2.27A.10(a)(ii)(2), 2.27A.10(d)
    1 October 2023
    Facility Dispatch Process
    The purpose of this Procedure is to describe the following: the processes AEMO and Market Participants must follow in issuing, recording, receiving, confirming, and responding to Dispatch Instructions; the methodology and data requirements for converting sent-out Dispatch Instructions to as-generated Dispatch Instructions where agreed by AEMO for a Registered Facility; the process and basis for issuing Dispatch Instructions where AEMO is unable to successfully run the Dispatch Algorithm for a Dispatch Interval; the process to be used by AEMO for selecting, applying, invoking and revoking Constraint Equations or Constraint Sets in response to Network Constraints for use in the Dispatch Algorithm; and the circumstances in which AEMO will use Fully Co-optimised Network Constraint Equations and Alternative Network Constraint Equations in the Dispatch Algorithm.
    7.5.4(a), 7.5.4(b), 7.6.3, 7.6.18(a), 7.6.18(b)
    1 October 2023
    Essential System Service Quantities
    The purpose of this Procedure is to document the methodologies and processes to be followed by AEMO in determining, for each Pre-Dispatch Interval and Dispatch Interval: the quantity of Regulation to schedule and dispatch, including: the identification and measurement of sources of variability; and the method by which the quantity of Regulation required is calculated; the combination of Contingency Reserve and RoCoF Control Service required to maintain the frequency of the SWIS within the Credible Contingency Event Frequency Band, including the use of Facility Speed Factors for a Facility; and the expected quantities of any other Frequency Co-optimised Essential System Services required in each Dispatch Interval or Pre-Dispatch Interval to meet the Essential System Service Standards’, the Dispatch Algorithm used by AEMO for the purpose of the Central Dispatch Process and setting Market Clearing Prices and the mathematical formulation of the Dispatch Algorithm, including: the conversion of Facility Speed Factors into Facility Performance Factors; and the calculation of Minimum RoCoF Control Requirement and Additional RoCoF Control Requirement, the methodology AEMO uses to determine: Contingency Raise Offsets; Contingency Lower Offsets; Facility Performance Factors; the Minimum RoCoF Control Requirement; the Additional RoCoF Control Requirement; and the RoCoF Upper Limit.
    3.11.7, 7.2.5(a)I, 7.2.5(b)iii, 7.2.5(a)ii, 7.2.5(b)iv, 7.2.5(b)v, 7.2.5(b)I, 7.2.5(b)ii, 7.2.5(b)vii,
    1 October 2023
    Verification of Dispatch Inflexibility
    The purpose of this Procedure is to document the forms of independent verification to be used to support a reason given under clause 7.6.31(b).
    7.6.33
    1 October 2023
    Congestion Information Resource
    The purpose of this Procedure is to specify the information to be published in the Congestion Information Resource the processes to be followed by AEMO in maintaining, publishing and updating the information in the Congestion Information Resource, the processes to be followed by AEMO in preparing the annual congestion report described in clause 2.27B.6 and the information that AEMO may reasonably require a Network Operator or other Rule Participant to provide to AEMO to assist it with carrying out its obligations under clause 2.27B.
    2.27B.8, 2.27B.4, 2.27B.6(d)
    1 October 2023
    Dispatch Algorithm Formulation
    This Procedure documents the Dispatch Algorithm used by AEMO for the purpose of the Central Dispatch Process and setting Market Clearing Prices and the mathematical formulation of the Dispatch Algorithm
    7.2.5(a)(iii), 7.2.5(a)(iv), 7.2.5(a)(v), 7.2.5(a)(vi), 7.2.5(a)(vii), 7.2.5(c), 7.2.8, 7.6.24, 7.6.27, 7.11C.11
    1 October 2023
    RCM Constraint Formulation
    This Procedure documents the processes for AEMO to use to determine RCM Constraint Equation terms and coefficients for Network Constraints.
    2.27A.10(b), 2.27A.10(c), 2.27A.10(cA), 2.27A.10(cB), 2.27A.10(d)
    29 September 2023
    Power System Security
    The purpose of this Procedure is to document the process to be followed by Rule Participants in providing Equipment Limit information to AEMO, the process to be followed by AEMO in establishing and modifying the Technical Envelope, including how AEMO will utilise Equipment Limit information, the processes to be followed by AEMO to enable it to ensure the SWIS operates according to the Technical Envelope applicable to each SWIS Operating State, the process to be followed by AEMO to determine Inertia Requirements and the process to be followed by AEMO to assess and maintain Power System Stability, including System Strength.
    3.2.7
    1 October 2023
    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
    GPS Compliance Tests and Generator Monitoring Plans 
    (pdf, 1.4 MB)  
    The purpose of this Procedure is to document the requirements under clauses 1.41.6, 3A.6.2 and 3A.9.1 of the WEM Rules.  1.41.6, 3A.6.2, 3A.9.1  21 July 2023

    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
    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
    System Restart
    (pdf, 272 KB)
    The purpose of this Procedure is to document the methodology and processes AEMO uses to determine the System Restart Standard and System Restart Plan; any matters, in addition to the requirements specified in clause 3.7.30, that the standard form contract for System Restart Service submissions may address; the factors AEMO may consider when determining whether changes from the standard form contract are reasonably required for the purposes of clause 3.7.36B; the processes to be followed by AEMO and Rule Participants in relation to the procurement of System Restart Services by AEMO; the methodologies and processes to be followed by AEMO in determining whether a System Restart Service submission is valid, analysing and selecting System Restart Service submissions to meet the System Restart Standard and accepting a System Restart Service submission to become an effective System Restart Service Contract; the processes to be followed by AEMO in conducting a review under clauses 3.7.10 and 3.7.11 and consulting with Network Operators; and any other matters AEMO considers as reasonably required in relation to System Restart Service provision or operation.  3.7.40(a), 3.7.40(b), 3.7.40(c), 3.7.40(d), 3.7.40(e), 3.7.40(f)  1 June 2022              
    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
    Reserve Capacity Security
    This Procedure outlines how Market Participants holding Certified Reserve Capacity must submit Reserve Capacity Security. 4.13.8,
    4.13A.23
    1 October 2023
    Reserve Capacity Testing
    The purpose of this Procedure is to describe the processes: to be followed in performing Reserve Capacity Tests, including the situations in which AEMO may deem a Reserve Capacity Test to be invalid and to be followed in performing Verification Tests, including the situations in which AEMO may deem a Verification Test to be invalid.
    4.25.14
    1 October 2023
    Reserve Capacity Performance Monitoring
    The purpose of this Procedure is to describe the procedure to be followed by Market Participants and AEMO when conducting Reserve Capacity performance monitoring and list the documents and other items that may be required by AEMO as supporting evidence in accordance with clause 4.27.11D.
    4.27.12
    1 October 2023
    Supplementary Capacity
    This purpose of this Procedure is to document the process AEMO follows in acquiring Eligible Services, entering into Supplementary Capacity Contracts, determining the Maximum Contract Value per hour of availability for any Supplementary Capacity Contract, determining how a payment in relation to a Supplementary Capacity Contract is to be made to a party that is not a Market Participant, determining that a provider of an Eligible Service has access to the network, requirements regarding the information and assistance AEMO may require from Western Power to support an expression of interest process or a procurement process, requirements, developed in consultation with Western Power, regarding the information that must be provided by those applying to provide Eligible Services in accordance with clause 4.24.18B, timelines, developed in consultation with Western Power where applicable, for the provision of requested information and assistance or an assessment and contact details for Western Power, which must be used by AEMO or those applying to provide Eligible Services in accordance with clause 4.24.18B.
    4.24.18
    1 October 2023
    Certification of Reserve Capacity for the 2022 Reserve Capacity Cycle
    This Procedure documents the procedures that Market Participants must follow when applying for Certified Reserve Capacity, the methodology AEMO uses for determining Planned Outage rates and Forced Outage rates, the procedures AEMO must follow when processing applications for Certified Reserve Capacity, including, how Certified Reserve Capacity is assigned and how AEMO will account for any degradation of an Electric Storage Resource, based on the performance standards and specifications for the Electric Storage Resource provided by the relevant manufacturer; and the performance of the Electric Storage Resource in the Capacity Year at the time the application for certification of Reserve Capacity is required to be processed, where available, the process for the application of clause 4.28C and the matters AEMO will have regard to in forming its opinion under clause 4.28C.1(d) and the information required to be provided by a Market Participant under clause 4.10A.6 in support of its nomination that a Facility be classified as a Network Augmentation Funding Facility.
    4.9.10(a), 4.9.10(b), 4.9.10(c)(i), 4.9.10(c)(iii)(1), 4.9.10(c)(iii)(2), 4.10A.6, 4.10A.11, 4.28C.15
    11 July 2023
    Certification of Reserve Capacity for the 2023 Reserve Capacity Cycle
    This Procedure documents the procedures that Market Participants must follow when applying for Certified Reserve Capacity, the methodology AEMO uses for determining Planned Outage rates and Forced Outage rates, the procedures AEMO must follow when processing applications for Certified Reserve Capacity, including, how Certified Reserve Capacity is assigned and how AEMO will account for any degradation of an Electric Storage Resource, based on the performance standards and specifications for the Electric Storage Resource provided by the relevant manufacturer; and the performance of the Electric Storage Resource in the Capacity Year at the time the application for certification of Reserve Capacity is required to be processed, where available, the process for the application of clause 4.28C and the matters AEMO will have regard to in forming its opinion under clause 4.28C.1(d) and the information required to be provided by a Market Participant under clause 4.10A.6 in support of its nomination that a Facility be classified as a Network Augmentation Funding Facility.
    4.9.10(a), 4.9.10(b), 4.9.10(c)(i), 4.9.10(c)(iii)(1), 4.9.10(c)(iii)(2), 4.10A.6, 4.10A.11, 4.28C.15
    11 July 2023
    Electric Storage Resource Obligation Intervals
    This Procedure documents the processes to be followed by AEMO for determining changes to the Trading Intervals that will be classified as Electric Storage Resource Obligation Intervals under clause 4.11.3A(a), including the processes to be followed by AEMO to comply with its obligation to consult with Market Participants, the processes to be followed by AEMO for publishing the Trading Intervals classified as Electric Storage Resource Obligation Intervals in accordance with clause 4.11.3A(a) on the WEM Website and the circumstances, if any, that allow AEMO determine, in accordance with clause 6.3.1 and without consultation with Market Participants, that the Trading Intervals classified as Electric Storage Resource Obligation Intervals for a specific Trading Day are not the Electric Storage Resource Obligation Intervals published by AEMO under clause 4.11.3A(a).
    4.11.3A(c)
    11 July 2023
    Network Access Quantity Model
    The purpose of this Procedure is to document the processes, methodologies, inputs, parameters and assumptions to be applied in the Network Access Quantity Model for modelling the prioritisation and determination of Network Access Quantities to Facilities under Appendix 3 of the WEM Rules; the processes to be followed by AEMO in determining the facility dispatch scenarios under clause 4.15.5; the processes AEMO must follow when determining Network Access Quantities for a Reserve Capacity Cycle, including how Network Access Quantities are determined for Facilities; the processes to be followed by AEMO for publishing the information under clause 4.15.16; without limiting any other provision of these WEM Rules, information that a Market Participant or Network Operator must provide to AEMO and the format it must be provided in, for the purposes of operating the Network Access Quantity Model and determining Network Access Quantities to Facilities under Appendix 3 of the WEM Rules; any other matters that AEMO reasonably deems relevant to performing its functions under section 4.15; and the process for the application of section 4.28C and the matters AEMO will have regard to in forming its opinion under clause 4.28C.1(d).
    4.15.17, 4.28C.15
    1 March 2023
    Declaration of Bilateral Trades The purpose of this Procedure is to outline the process Market Participants must follow to submit a Bilateral Trade Declaration and the process AEMO must follow to assess and approve or reject a Bilateral Trade Declaration.
     4.14.11 1 September 2022
    RCM Limit Advice Requirements The purpose of this Procedure is to outline in respect of the information to be provided by a Network Operator to AEMO under clause 2.27A.2 (to the extent that the information relates to RCM Limit Advice) the information and data to be provided by each Network Operator to AEMO, the processes to be followed for the provision of and, where applicable, updates to such information and any other information referred to in clause 2.27A.4, from each Network Operator to AEMO, including: the format, form and manner in which such information must be provided and where the WEM Rules do not provide a timeframe for the provision of such information to AEMO, the reasonable times by which such information must be provided having regard to the scope and nature of the information to be provided. The Procedure also outlines the processes AEMO must follow in providing the information to Network Operators under clause 4.4B.2 and any other processes or procedures relating to Constraints or Network congestion that AEMO considers are reasonably required to enable it to carry out its functions under the WEM Rules. 2.27A.4, 2.27A.6(a)iii, 2.27A.10(a)(i), 2.27A.10(a)(ii)1, 2.27A.10(a)(ii)(2), 2.27A.10(bA) 15 March 2022
    Indicative Facility Class and RCM Facility Class Assessment 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 1 March 2022
    Facility Sub-Metering 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 December 2021
    Certification of Reserve Capacity for the 2021 Reserve Capacity Cycle This Procedure documents the procedures that Market Participants must follow when applying for Certified Reserve Capacity, the methodology AEMO uses for determining Planned Outage rates and Forced Outage rates, the procedures AEMO must follow when processing applications for Certified Reserve Capacity, including, how Certified Reserve Capacity is assigned and how AEMO will account for any degradation of an Electric Storage Resource, based on the performance standards and specifications for the Electric Storage Resource provided by the relevant manufacturer; and the performance of the Electric Storage Resource in the Capacity Year at the time the application for certification of Reserve Capacity is required to be processed, where available and the process for the application of clause 4.28C and the matters AEMO will have regard to in forming its opinion under clause 4.28C.1(d). 4.9.10(a), 4.9.10(b), 4.9.10(c)(i), 4.9.10(c)(iii)(1), 4.9.10(c)(iii)(2), 4.28C.15 29 October 2021
    Undertaking the LT PASA  The purpose of this Procedure is to describe the procedure AEMO follows in conducting the Long Term PASA  4.5.14.  20  September 2022

WEM Procedures that AEMO will publish after 1 October 2023

WEM Procedure Related Rules

Reliability Standard Implementation

3.3.2

ST PASA

3.16.10

Low Reserve Conditions

3.17.11

MT PASA

3.16.10

Real-Time Market Suspension

7.11D.4

Tolerance Ranges and Dispatch Compliance

2.13.19; 7.10.5; 7.10.21.

Forecast Unscheduled Operational Demand

7.3.4

Direction of Registered Facilities in Scarcity Conditions

7.7.14

SESSM Procurement

3.11.4; 3.15A.46

Network Modelling Data

2.28.20

IMS Interface for Network Operators

2.36.7

Facility registration, de-registration and transfer

2.29.4N; 2.29.5N; 2.29.9; 2.31.25(b); 2.31.25(c); 2.31.25(d)

At the 14 September 2023 WEM Reform Implementation Group (WRIG) meeting, AEMO advised that the above 12 WEM Procedures will not be published prior to the New WEM Commencement Day. The presentation explains the delay and expected timeframes for publishing, along with advice for Market Participants in the interim period. Any questions regarding the status of these WEM Procedures or how they may impact you should be emailed to WA.ETS@AEMO.com.au.

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