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… © Transpower New Zealand Limited. All rights reserved. ii Report Purpose To provide information on ancillary service … 09:00 A grid emergency was declared to remove South Island transmission circuits from service to assist with managing … 10:45 A grid emergency was declared to remove North Island transmission circuits from service to assist with managing …

… charge (BBC) assumptions book (assumptions book) under the transmission pricing methodology (TPM).1 2. The assumptions … refreshed using the Beca and Concept 2025 Generation Stack Report (2025 Generation Stack Report). • Updated generation … complex, only primary fuels may be modelled in expansion planning. Six candidate thermal plants are considered with a …

… Terms of reference for Transmission Pricing Methodology working group Introduction … 1. Transpower has initiated an ‘operational review’ of the Transmission Pricing Methodology (TPM) to address concerns … of the PIR are set out in Concept Consulting’s summary report. 9. In November 2025, after completing the PIR, …

… of 2023 we published the 2024 Credible Event Review Scope report signalling what we would study during the 2024 … running under the Cook Strait, is a major part of the transmission system which enables the transport of … to identify and review the events deemed credible on the transmission system and to determine if the classification …

… of 2023 we published the 2024 Credible Event Review Scope report signalling what we would study during the 2024 … running under the Cook Strait, is a major part of the transmission system which enables the transport of … to identify and review the events deemed credible on the transmission system and to determine if the classification …

… the SOROP 4. The SOROP is one of our key security of supply planning and policy documents. 5. The SOROP is intended to … for shortages of electricity supply and shortages of transmission capacity. • Energy savings targets are aligned … the required weekly information and ensure that this reporting can be done online if possible. This will make the …

… TRANSPOWER NEW ZEALAND | System operator initial report: Northland loss of supply i Contents 1 Introduction … at 09:00 Saturday 11 May 2024 to remove South Island transmission circuits from service in accordance with its … in power systems with significant lengths of east-west transmission lines in the higher latitudes (greater than 45º …

… 2024 Interconnection Asset Capacity and Grid Configuration Report Data ..... 1 1.1 Background … and interested participant understanding of our Outage Planning processes and to improve transparency of Transpower … discussed the proposed outage plan with each designated transmission customer and interested participant on an …

… Power BI Desktop Market Operations Weekly Report - Week Ended 14 December 2025 TRANSPOWER // MARKET … GWh was transferred north. AC asset outages have reduced transmission capability, causing the northward limit to … disturbances that, if unmitigated, might interfere with transmission lines. Taking Earth’s magnetic field as B ≈ 50 …

… 2023 Review October 2023 About this document 2 Purpose This report reviews the performance of the electricity system and … is a significant asset failure in the generation fleet or transmission network) and sufficient fuel available to … in different ways. Peak demand The failure of generation or transmission assets impacts the ability to meet peak demand. …