Resources

… the PPOs prior to investment in upgrades and investment in transmission alternatives. 2 Principles for System Security … currently available; 1 As defined in the Transmission Planning Report 4.1.5 A range of power system conditions for the …

… ▪ land has been acquired for construction of the project ▪ planning consents, construction approvals and licences have … of the local system load, the status of all the 220 kV transmission circuits from north of Bunnythorpe to Haywards, … SSF uses the same method as the 2022 Transmission Planning Report (TPR) “expected” forecast8 prepared by Transpower, in …

… 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 …

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

… the risk of the loss of a large generating unit or transmission circuit triggering operation of Automatic Under … Part D: North Island and South Island 220 kV Grid Backbone reports. 4 Security of Supply Annual Assessment | Transpower https://www.transpower.co.nz/system-operator/planning-future/security-supply-annual-assessment SYSTEM …

… 4.1 to 4.5 below, these form the base assumptions for this report: ▪ Studholme is supplied from Waitaki in Winter, with … before the voltage and thermal issues identified in this report, particularly for planned outages of 220 kV circuits … ceases operation in 2025, this will be the only remaining transmission constraint binding in this scenario for both …

… or cascading failure. Besides our study findings, this report recommends further assessment, discussions with asset … type of faults can occur between the three conductors of a transmission line or buses at a substation. This is a low … power system. https://www.transpower.co.nz/system-operator/planning-future/system-security-forecast TRANSPOWER NEW …