Expression of Interest (EOI) NCESS – Reliability and System Strength Services for the North Country

### ⚡ Tender Overview: North Country Reliability and System Strength Services Western Power is seeking Expressions of Interest (EOI) for **Non-Co-optimised Essential System Services (NCESS)** to enhance grid reliability and system strength in the North Country region of Western Australia. This procurement is triggered under the Electricity System Market (ESM) Rules to mitigate risks associated with planned or unplanned outages on 132 kV transmission lines. ### 🎯 Scope and Requirements - **Objective:** Provide Reliability Services and/or System Strength Services to support the network supplied by the Rangeway, Geraldton, and Chapman substations. - **Solutions:** Western Power is actively encouraging **innovative non-network solutions** that can improve grid stability and secure operations. - **Flexibility:** Proponents may propose solutions that fully or partially meet the requirements for either or both service types. - **Documentation:** Bidders must review the provided *Draft NCESS Service Specification*, *EOI Submission Form*, and *NCESS NC Contract Template*. ### 📅 Key Dates - **Open Date:** 22 May 2026 - **Supplier Query Cut-off:** 26 June 2026 - **Closing Date:** 03 July 2026, 05:00 PM (WST) - **Expected Decision:** 31 July 2026 ### 💡 Why Bid? This is a critical infrastructure opportunity for energy providers to contribute to the resilience of Western Australia's electricity network. Proponents are strongly encouraged to include pricing in their EOI for funding evaluation. **Keywords:** NCESS, Western Power, Electricity Network, Grid Reliability, System Strength, North Country, Energy Infrastructure, Non-Network Solutions, Western Australia Procurement.