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… assessments highlight some upcoming tighter periods due to transmission outages reducing the post- contingent voltage … stem-operator/notices-and-reporting/market-operations-weekly-report/energy-security-outlook … stem-operator/notices-and-reporting/market-operations-weekly-report/energy-security-outlook TRANSPOWER.CO.NZ Any …

… 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 …

… 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 …

… but uncleared generation, ▪ request Transpower as the transmission grid owner to increase transmission offers or require them to reconfigure the grid … https://www.transpower.co.nz/system-operator/notices-and-reporting TRANSPOWER NZ | SYSTEM OPERATOR CONSULATION PAPER …

… 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. …

… from a helicopter used to clean insulators on the HVDC transmission line Recent Successes • Successfully completed … stem-operator/notices-and-reporting/market-operations-weekly-report/energy-security-outlook …

… All complete New SI capacity margin published with daily reporting Next steps ERC and SST update anticipated by the … these charts will be published alongside our daily reporting on the website. SI margins: N-1-HVDC (N-1-G) • … by end of the week • Review your outages (Generation or transmission) that negatively impact hydro, cancel or defer …