We need to continually operate, maintain and develop New Zealand's transmission network - the National Grid - to ensure we meet the ongoing electricity needs of New Zealanders.
We have identified that the Central Park–Wilton 'B' transmission line in Wellington will require its conductor (ie wire) replaced by 2020.
We are replacing two transformers at our Ashley substation.
We are installing a new supply transformer at our Hamilton substation, and extending the switchyard there
We are installing a new interconnecting transformer at Halfway Bush in Dunedin to replace an existing transformer there.
Transpower is carrying out an investigation into the need for further capacity to meet peak demand at our Wiri and Bombay substations.
Where appropriate we use Special Protection Schemes to manage parts of the grid after an event.
We are carrying out a project to install two new supply transformers at Huirangi substation to replace the existing units there.
Our current programme focuses on enabling commercial buildings in demand response. Find out more and how you can get involved.
We are carrying out a project to install three new supply transformers at Timaru substation to replace the existing units there.
We need to continually operate, maintain and develop New Zealand's transmission network – the National Grid – to ensure we meet the ongoing electricity needs of New Zealanders.
We are working on a project to connect the existing 110 kV Paraparaumu substation off Valley Road to the nearby 220 kV Bunnythorpe–Haywards A&B lines
We are reconfiguring our equipment at Wilton to improve supply security to the Wellington region
We have replaced the conductor on the transmission line between Wanganui and Stratford
We have replaced the conductor on the transmission line between Opunake and Stratford.
We have installed more voltage support equipment at Penrose and Marsden substations.
We have constructed and installed new AC/DC converter equipment at Benmore (South Island) and Haywards (North Island) substations to increase capacity of the high voltage direct current inter-island link.
We are carrying out a project to get more capacity out of our transmission lines between Roxburgh and the Waitaki Valley.
This project provides more capacity to our networks in the lower South Island.
We are replacing the conductor on the Bunnythorpe to Haywards A and B lines.
We are improving the electricity supply to the South Island, north of the Waitaki Valley.
We are adding special equipment into selected substations in our network so that they can be brought back online faster after an outage.
We are removing an existing single circuit transmission line and replacing it with a double circuit line north of Taupo.