WEM Supplementary Capacity 2024-25

Summary and scope

The Australian Energy Market Operator (AEMO) administers and operates the Wholesale Electricity Market (WEM) in the South West Interconnected System (SWIS). AEMO has identified a potential requirement to secure up to 285 MW of Supplementary Capacity over the 1 December 2024 to 1 April 2025 period. As such, AEMO is commencing the Supplementary Capacity process for the 2024-25 Capacity Year in accordance with Section 4.24 of the WEM Rules. • Supplementary Capacity for the 2024-25 Capacity Year will be activated between the hours of 3:30PM and 8:30PM AWST, in blocks of no less than 2 hours and must provide at least 1 MW of supplementary capacity. • The maximum term of SC Contracts will be 121 days commencing 8am on 1 December 2024 and ending 8am on 1 April 2025, with shorter Supplementary Capacity Contracts entered into as required. • In 2023-24, AEMO activated Supplementary Capacity for 70 hours during the Service Period. AEMO does not expect to activate Supplementary Capacity in excess of that. Submissions are invited for two different types of Supplementary Capacity Service: Availability and Activation (A&A) Service provided by Registered Facilities and Unregistered Equipment. This service is similar to the service provided in previous Supplementary Capacity tenders for 2022-23 and 2023-24. Activation-only (AO) Service provided by Unregistered Equipment only. This is a new service applicable to this tender. Tender submissions to this call for tenders must be made via VendorPanel by 5:00PM (AWST) Thursday 5 September 2024. All AEMO enquiries must be directed via AEMO’s eSourcing tool, VendorPanel. For assistance, please contact the WA Capacity Market Investment team at wa.capacity@aemo.com.au. Western Power enquiries should be directed to network.access@westernpower.com.au. The WEM Procedure: Supplementary Capacity can be located here: https://aemo.com.au/energy-systems/electricity/wholesale-electricity-market-wem/procedures-policies-and-guides/procedures Amending WEM Rules relevant to the Supplementary Capacity process can be found at: https://www.wa.gov.au/government/document-collections/wholesale-electricity-market-amendment-supplementary-capacity-no-3-rules-2024