Publications and resources

In the rare event of a lightning strike or fault on the transmission line, towers or poles may transfer high voltage and dangerous currents into the ground for a very short instant. This is...

Transpower regularly publishes a Transmission Planning Report (TPR) which details the grid asset capability over the next 15 years. ...

Transmission Tomorrow - Our Strategy 2018 sets out our vision of New Zealand's electricity industry over the next 5 - 40 years.

We have undertaken an investigation of the Value of Lost Load (VoLL) to inform our expenditure decisions and regulatory applications. ...

A supporting document to our 2018 Integrated Transmission Plan, the Asset Management Plan explains how we undertake asset management.

This report builds on the 2017 Services Report, describing the grid output measures for our regulated transmission business for the third regulatory control period (RCP3) of...

Auckland is changing. Rapidly. Roads, housing, technology, industry and electricity. ...

Shaping our draft proposal to the Commerce Commission for our third Regulatory Control Period (RCP3) depends on input from our stakeholders. We appreciate that many of you have shaped...

Addressing climate change, and meeting New Zealand's Paris Agreement commitments, will require our electricity system to begin planning and adapting for the future needs of our...

Our interim findings and emerging strategy to support the future growth of our largest city.