Western Power is seeking Expressions of Interest (EOI) for Non-Co-Optimised Essential System Services (Ncess) for reliability and system strength in the North Country. The services aim to address reliability and system strength concerns during planned or unplanned outage events affecting transmission lines. Prospective providers can offer reliability services, system strength services, or both. Innovative non-network solutions are encouraged. The EOI process includes a draft Ncess Service Specification and submission of pricing. Key dates include EOI closing on July 3, 2026. The services are required in the North Country region, defined by the Rangeway, Geraldton, and Chapman substations.
The closing date for the lodgement of Expressions of Interest (EOIs) is July 3, 2026.
Western Power will apply selection criteria including valid submission, compliance with specification, evidenced delivery, environmental approvals, project methodology, technical capabilities, Western Australian industry participation plan, and value for money.
Ncess service providers may be currently registered market participants or intending to register. For new facilities, progress reports are required every 3 months after contract execution until commercial operation.
In the event of service unavailability, there will be a reduction in payments by Western Power depending on the duration of the unavailability.
Failure to provide required information for selection criteria such as evidenced delivery, environmental approvals, project methodology, and technical capabilities will result in exclusion from the evaluation process.
