Expression of Interest for NCESS – Network Support Services for Byford Peak Demand Services WS5323348107 - NCESS NSS Byford Peak Demand Services
Expression of Interest for NCESS – Network Support Services for Byford Peak Demand Services
WS5323348107 - NCESS NSS Byford Peak 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 peak demand services for the Byford 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 Byford load 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 service is required for energy supply or reduction of energy withdrawal at the transmission substation level via the distribution network electrically connected to Byford substation. The proposed services are needed from the 1st December 2026 until the 1st April 2029.
Activation of the service will occur between 4:30 PM and 8:30 PM AWST or parts thereof, with NSS being prioritised over other contracted services. The service may be called upon up to 20 times per each Activation Period (each 1 December – 1 April period). 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 December 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 13th October 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 |
11 August 2025 |
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Call for EOI’s |
3 September 2025 |
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Cut-off date for questions for EOI |
6 October 2025 |
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Closing Date and time for lodgement of EOIs |
13 October 2025 |
EOI Documents
NCESS Draft Service Specification – NSS Byford Peak Demand Services
NCESS Expression of Interest Submission form – NSS Byford Peak 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/2025-08/ncess_nss_procurement_trigger_submission_to_coordinator_byford_substation_final_redacted_2.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/2025-08/coordinator_of_energy_determination_ncess_trigger_condition_byford_substation_2_sw.pdf ]