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… in the north. This region is supplied by 220 kV and 66 kV transmission circuits with interconnecting transformers at … collapse limits associated with contingencies of the 220 kV transmission backbone in Grid Zone 10 and 11 are also discussed in Part D, South Island Backbone report. • The following scenarios were developed to analyse …

… transfer is 1134 MW received at Haywards. In evaluating the transmission constraints for a dry island, we have assumed … and a limit of 1134 MW received at Haywards. • Committed transmission and generation changes are incorporated as per … generation. Note that not all constraints have been reported in this section, only those which would require …

… | SYSTEM OPERATOR 2 About this document Purpose This report reviews the performance of the electricity system and … market resources (by type) and required load (including transmission losses) shown by the black dot. The 10th … to security of supply. In the longer term, we are also planning further changes to our website to improve access to …

… Margin (SI-WEM); adequacy of generation and north-to- south transmission capacity to meet expected South Island … a section in the Security of Supply Assessment (SOSA) report looking at the implications of increasing the … It could also inform government, and Transpower’s, planning and oversight of the market so that it is better …

… forecast used in this SSF uses the same method as the 2023 Transmission Planning Report (TPR) “expected” forecast2 prepared by Transpower, in …

… 6 2.7 Transmission Assumptions … in the Assumptions Spreadsheet. Forecast demand includes transmission losses and demand served by larger, modelled … below. 2.3.1 Monitoring of storage The System Operator reports on aggregate available hydro storage relative to the … Forecast. https://www.transpower.co.nz/system-operator/planning-future/system-security-forecast TRANSPOWER NEW …

… 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. …

… 10 3. Planning … flow of electricity across Transpower’s high-voltage transmission network. We are responsible for ensuring … you will provide modelling files and a connection studies report. ▪ Validated power system models: the System Operator … to prepare two important datasets as part of a data transmission contract. These are: ▪ a set of indications and …

… output from the Unit that supports the initial charging of transmission circuits and other Assets, and the progressive … Agent must: (a) Inform the System Operator: immediately report the unexpected outage to the System Operator, including reporting to the System Operator the expected time to …

… should the status escalate Current key activities Updating reporting as per routine Next steps No further action … for these in our decision • A wider review of the risk reporting framework is required • SOS processes and … you, and key updates • Review your outages (Generation or transmission) that negatively impact hydro, cancel or defer …