Projects | Transpower

Upper South Island upgrade project

Last updated: 15 Apr 2025

Transpower is investigating possible electricity infrastructure investments for the upper South Island, to ensure a reliable power supply for the future as the region grows and more homes and businesses switch their energy use to electricity.

HVDC Submarine Cable Replacement and Enhancement Investigation

Last updated: 15 Apr 2025

Transpower plans to replace the ageing electricity cables that cross Cook Strait at the end of the decade and is considering whether to also increase the capacity of the cables at the same time.

Cable joint repair project - Auckland

Last updated: 14 Apr 2025

Transpower is replacing joints on an underground electricity cable in Auckland between our Brownhill and Pakūranga substations.

Resilience, reliability and an Energy Bridge for Te Tai Tokerau Northland

Last updated: 11 Apr 2025

Transpower, Northpower and Top Energy are working together with the people of Northland to plan electricity infrastructure that ensures a resilient, reliable network and helps Northland take advantage of new renewable generation possibilities.

Automated Under Frequency Load Shedding (AUFLS) Project

Last updated: 01 Apr 2025

This Transpower project provides information on the transition from a two block load shedding scheme to a four block load shedding scheme. The four block scheme is planned to be operational by 2025.

Newlands and Woodridge Towers to Poles

Last updated: 21 Mar 2025

Transpower plans to replace the transmission towers in and around Newlands and Woodridge in Wellington with modern steel poles, with work happening during 2024 and 2025.

Helicopter Works 2025

Last updated: 17 Mar 2025

Transpower regularly flies its transmission lines to survey for slips and/or assess conductor (wire) condition.

Bunnythorpe-Wilton (Judgeford to Wilton) Reconductoring Project

Last updated: 17 Mar 2025

We are replacing the conductor (wire) on the Bunnythorpe-Wilton transmission line in Wellington.

Penrose Control Room Replacement Project

Last updated: 17 Mar 2025

We are undertaking a project to build a new control relay room at our Penrose substation site and decommission the existing building.