Projects | Transpower

HVDC Submarine Cable Replacement and Enhancement Investigation

Last updated: 17 Jan 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.

Enabling Huapai

Last updated: 16 Jan 2025

Huapai has an existing switching station which will need to develop into a substation to provide Northland more resilience and be available for demand growth in North Auckland.

Western Bay of Plenty Development Plan

Last updated: 23 Dec 2024

Information about planning for increased electricity capacity in the western Bay of Plenty

Upper South Island upgrade project

Last updated: 23 Dec 2024

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.

Automated Under Frequency Load Shedding (AUFLS) Project

Last updated: 19 Dec 2024

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.

Redclyffe substation rebuild

Last updated: 19 Dec 2024

Transpower is working to improve the resilience of the Hawke’s Bay’s electricity supply by strengthening our Redclyffe substation. The substation was severely damaged during Cyclone Gabrielle in 2023.

Cable joint repair project - Auckland

Last updated: 11 Dec 2024

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

Waikato and Upper North Island (WUNI) Upgrade

Last updated: 11 Dec 2024

We're making investments to manage voltage stability in the Waikato and Upper North Island regions.

Upcoming Planned Outages

Last updated: 28 Nov 2024

Sometimes Transpower needs to turn the power off to work on its equipment. Upcoming outages are listed here.