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Market Procedures and Power System Operation ProceduresCurrent versions of the WEM Market Procedures and Power System Operation Procedures can be found on this page.
Name Description Head of Power Latest Update Procedure Administration This Procedure outlines the process to develop and amend Market Procedures. Clause 2.9.5 30 November 2015 This Procedure outlines setting the confidentiality status for market related information and documents produced or exchanged under the Market Rules or Procedures. Clause 10.2.1 30 November 2015
This Procedure provides details of the various IT interfaces for participating in the Wholesale Electricity Market. Clause 2.36.5 30 November 2015 Notices and Communications This Procedure outlines how notices and communications are to be provided to or by AEMO. Clause 1.6.1 30 November 2015 This Procedure describes how changes are implemented for the AEMO Public Website. Clause 10.3.5 30 November 2015 This Procedure outlines the parameters that AEMO and System Management must use when providing each other information under the Market Rules. Clause 2.36.9 30 November 2015 Name Description Head of Power Latest Update This Procedure covers the process and information required for a Market Participant to make a Capacity Credit Allocation Submission. Clause 9.4.3 30 November 2015 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. Clause 2.31.23 30 November 2015 This procedure outlines the process by which Intermittent Loads will be subject to Reserve Capacity Refunds. Clause 4.28A.3 30 November 2015
This Procedure covers the process for determining Loss Factors. Clause 2.27.6 30 November 2015 This Procedure covers how Meter Data Agents submit Meter Data to AEMO, including the timing and format of submissions. Clause 8.6.2 30 November 2015 This Procedure outlines the process for new participant registration and existing Market Participant de-registration. Clause 2.31.23. 30 November 2015 This Procedure outlines how AEMO will manage liabilities that arise in the Settlement process. Clause 2.43.1 30 November 2015 Settlement Procedure
This Procedure outlines the financial settlement of trading through the Wholesale Electricity Market. Clause 9.2.1 30 November 2015 Balancing Facility Requirements Procedure
This Procedure outlines the technical communication criteria that a Balancing Facility, or a type of Balancing Facility must meet.
Clause 7A.1.6 30 November 2015 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.
Clause 7A.3.20 30 November 2015 Name Description Head of Power Latest Update
This Procedure outlines the process for the certification of Reserve Capacity. Clause 4.9.10 30 November 2015
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. Clause 4.14.11 30 November 2015
This Procedure outlines the process by which Market Customers and AEMO interact to facilitate the determination of the Initial Individual Reserve Capacity Requirement (IRCR).
Clause 4.28.12 30 November 2015 Reserve Capacity Performance Monitoring This Procedure details the requirements and processes for determining the performance of the market with regard to Reserve Capacity. Clause 4.27.12 30 November 2015 Reserve Capacity Security
This Procedure outlines how Market Participants holding Certified Reserve Capacity must submit Reserve Capacity Security. Clause 4.13.8 30 November 2015
Reserve Capacity Testing This Procedure details the Reserve Capacity Testing steps. Clause 4.25.14 30 November 2015 Treatment of Small Generators This Procedure describes the process for assigning Capacity Credits to New Small Generators. Clause 4.28B.9 30 November 2015 Undertaking the LT PASA and conducting a review of the Planning Criterion This Procedure outlines the preparation of the LT PASA, development of the SOO and the review of the Planning Criterion. Clause 4.5.9 30 November 2015 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. Clause 4.24.18 30 November 2015
System Management Power System Operation Procedures
Name Description Head of Power Latest UpdateAncillary Services [144kB]
This sets out the processes followed each year for the assessment and identification of Ancillary Services requirements as part of the Ancillary Services procurement process. Clauses 3.11.14, 3.11.15, 7B.1.2 1 July 2012
Commissioning and Testing [285kB]
This 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. Clause 3.21A.15 1 March 2014
This sets out the communication and control system requirements needed to support the dispatch process. Clause 2.35.4 1 July 2012
This sets out the process that System Management will follow in preparing and verifying the Generating Facility Output derived from System Management’s SCADA system and used to assess EGC facility MWh output data, Non-EGC MWh output data, and the operational System Load Estimate. Clauses 7.6A.7 and 7.7.9 1 November 2009Dispatch [422kB]
This sets out the processes that System Management and Market Participants must follow in order to meet the dispatch rules. Clauses 7.2.5, 7.6.13, 7.6A.2, 7.7.4A, 7.7.5A, 7.7.5C, 7.7.5B, 7.7.9, 7.9.19, 7.13.1(eD), 7.13.3, 7A.3.7, 7A.3.15, 7B.1.4 5 March 2014
Facility Outages [214kB]
This sets out the processes that System Management and Rule Participants must follow in planning for Facility outages. Clauses 3.18.21, 3.19.14, 3.21.12, 4.11.1(h) 7 April 2014Glossary [30kB] This provides a definition of the terms used in the Power System Operating Procedures. 29 September 2006Monitoring and Reporting [88kB]
The sets out the procedures System Management will implement to meet its obligation to monitor Rule Participants' compliance with Market Rules and the Power System Operating Procedures. Clause 2.15.4 1 July 2012
Medium Term PASA [71kB]
This sets out the procedures that System Management and Rule Participants must follow in the preparation and publishing of the Medium Term PASA. Clause 3.16.10 1 April 2009 This details System Management’s minimum requirements for the operational data points to be submitted by Market Generators for their generating units. Clause 2.35.4 6 February 2012 This details System Management’s minimum requirements for the operational data points to be provided by Market Participants for their networks, substations, and loads. Clause 2.35.4 1 August 2009Power System Security [105kB]
This sets out the security standards that must be maintained on the SWIS and the processes for maintaining these standards while electricity is traded through the market. Clause 3.2.7 1 July 2012
Short Term PASA [97kB]
This sets out the procedures that System Management and Market Participants must follow in the preparation of the Short Term PASA. Clause 3.17 1 April 2009System Restart Overview [68kB] This document outlines the actions and response to a black system condition or a major supply disruption. 1 April 2008
IMO Market ProceduresIMO Market Procedures can be found here.
WEM Procedure Changes
AEMO develops and changes procedures that relate to market operation and other market matters, while System Management develops operational procedures pertaining to short and medium system planning, security and reliability, and dispatch.
The IMO is responsible for developing and changing procedures related to rule making and compliance matters.
All WEM Procedure Change Proposals can be found here.