Expression of Interest for NCESS – Network Support Services for Geraldton Minimum Demand Services WS5313524424 - NCESS NSS Geraldton Minimum Demand Services
Expression of Interest for NCESS – Network Support Services for Geraldton Minimum Demand Services
WS5313524424 - NCESS NSS Geraldton Minimum Demand Services
The Coordinator of Energy has determined, under clause 3.11A.4 of the Electricity System Market (ESM) Rules, to initiate a Non-Co-optimised Essential System Services (NCESS) procurement process for minimum demand services for the Geraldton demand area.
Western Power is proactively managing capacity constraints as Distributed Energy Resources (DER) energy exports continue to grow across the South West Interconnected System (SWIS). Guided by the WA State Government’s DER Roadmap and recent amendments to the Access Code, Western Power has identified a need for solutions through Network Support Services (NSS).
Expression of Interest
Western Power is inviting Expressions of Interest (EOI) from potential NCESS providers to deliver NSS in the Geraldton area within its distribution network. This area has been selected based on Western Power’s assessment of the underlying need, technical requirements, and the potential for viable non-network solutions.
The required services will involve the capability to decrease DER exports or increase demand. The proposed services are needed from the 1st January 2026 until the 31st December 2028 during the minimum demand periods (Spring, Summer and Autumn months).
Activation of the service will occur between 8:30 AM and 4:30 PM AWST or parts thereof, with NSS being prioritised over other contracted services. The service may be called upon up to 10 times each calendar year, with a maximum duration of seven hours. Multiple providers may be considered for a single service.
The NCESS Service Specification provides detailed requirements for these services.
While the preferred commencement date for the proposed services is 1 January 2026, with a three-year duration, Western Power is open to feedback regarding potential benefits of alternative contract durations or commencement dates.
Queries may be submitted by email to emerging.technology.portfolio@westernpower.com.au or via Q&A function in VendorPanel portal.
Please submit an NCESS Expression of Interest via VendorPanel no later than 5:00pm (AWST) on 29th September 2025.
Interested NCESS provider should register with VendorPanel to be informed of whether any supporting documentation such as clarifications to questions may be published.
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Key activities |
Date |
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Coordinator of Energy to trigger NCESS |
30 July 2025 |
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Call for EOI’s |
26 August 2025 |
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Cut-off date for questions for EOI |
22 September 2025 |
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Closing Date and time for lodgement of EOIs |
29 September 2025 |
EOI Documents
- NCESS Draft Service Specification – NSS Geraldton Minimum Demand Services
- NCESS Expression of Interest Submission form – NSS Geraldton Minimum Demand Services
Western Power’s NCESS Trigger Submission (July 2025)
- NCESS Trigger Submission Network Support Services in metropolitan Perth [Link: https://www.wa.gov.au/system/files/2025-07/western_powers_ncess_trigger_submission_network_support_services_july_2025.pdf ]
- To find a copy of the Coordinator of Energy’s determination please visit Energy Policy WA’s web page: [Link: https://www.wa.gov.au/system/files/2025-07/coordinator_of_energy_determination_network_support_services_july_2025_0.pdf