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… of year, in part driven by outages on grid constraining transmission to upper North Island. • Geothermal at 22%. Te … 3 outage 2 22/02/2025 08/03/2025 Annual Pole 2 outage NZGB Reported NZGB N-1-G margins for 90% weather risk and Base … https://www.transpower.co.nz/system-operator/planning-future/system-security-forecast Security of Supply …

… of supply, which assesses how much fuel, generation and transmission capacity is available over different time … towards a lower carbon future. 1 See WiTMH monitoring report, New Zealand Steel new electric arc furnace and … MW. Japan – 3% to 8% (a practical metric for short- term planning and coordination as compared to the more “formal” …

… scenarios as the objective of the analysis is to test the transmission system’s limitations. These are during winter … the New Zealand grid is invaluable, and guidance for this report was solicited from those most familiar with these … the forecast developed for Transpower’s 2023 Transmission Planning Report (TPR) is used in these studies. However, it …

… energy margins assess the adequacy of generation and HVDC transmission capacity to meet expected electricity demand … Document https://www.transpower.co.nz/system-operator/planning-future/security-supply-annual-assessment … mazonaws.com/public/bulk-upload/documents/Market%20insight%20report%20-%20Winter%20Review%20-%2011%20Nov%202022.pdf …

… and work to improve clarity of the Electricity Risk Curves reporting in relation to contingent storage and Watch … https://www.transpower.co.nz/system-operator/planning-future/security-supply-annual-assessment TRANSPOWER … Transpower as the grid owner cancelled and delayed some transmission outages to release affected generation. The New …

… © 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 …

… 220 kV grid backbone 2. SYSTEM CONDITIONS Transpower’s 2022 Transmission Planning Report (TPR) identified five system conditions which …

… of the committed project test set out in Part B of this report. Contingency Plan A plan that identifies power system … Code. Contingent events include the loss of any single transmission circuit or generating unit, but do not include … AOPO Asset Owner Performance Obligations APR Annual Planning Report AUFLS Automatic Under-Frequency Load …

… and voltage stability issues. For these contingencies, the report notes both future grid projects that will resolve the … troughs In the previous SSF, assessments indicated several transmission circuits would need to be removed from service … of new reactors and STATCOMs, the need to switch off transmission circuits during light load has decreased. …

… additional capacity available. • Grid Owner to increase transmission offers where generation may be constrained. Low … to provide more generation. • Grid Owner to increase transmission offers where generation may be constrained. • … preparing our draft Security of Supply Assessment (SOSA) report for consultation which is anticipated to open later …