Electricity transmission
Transpower is the owner and operator of New Zealand's National Grid.
Transpower's role is to ensure electricity can be transported from where it is generated to some large electricity users and the distribution businesses that deliver it to homes and businesses all over the country. It's network is made up of nearly 12,000 km of high-voltage transmission lines (and the pylons that hold them) and more than 170 substations and switchyards. Transpower is responsible for building, maintaining and operating this network. Our role is to set the maximum revenue it can recover from consumers to run the National Grid efficiently.
Since 1 April 2011, Transpower has been regulated by way of individual price-quality regulation. The individual price-quality path governs Transpower's revenues for each pricing year, with the paths being reset either every 4 or 5 years. The individual price-quality path was reset for the 2020-2025 regulatory period on 14 November 2019. Read more information on Transpower's price-quality path.
Transpower is also subject to information disclosure regulation.
In this section
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Amendments to Transpower information disclosure requirements 2024
We have made changes to the information disclosure (ID) requirements for Transpower as required under Part 4 of the Commerce Act 1986.Read more -
Information disclosure requirements for Transpower
We require Transpower to publish information each year detailing its performance.Read more -
Exemptions to information disclosure requirements
Under the information disclosure and individual price-quality path determinations, Transpower can apply for exemptions from disclosure requirements. We provide some guidance about applying for an exemption.Read more -
Transpower's price-quality path
Since April 2011, Transpower has been regulated by way of individual price-quality regulation. The individual price-quality path governs Transpower's revenues for each pricing year, with the paths being reset every 4 or 5 years.Read more -
Transpower capital investment proposals
Transpower may submit separate proposals to seek approval for certain capital investment projects for the national grid or the high-voltage electricity transmission network.Read more -
Information disclosed by Transpower
Here you will find information disclosed by Transpower from 2015 to 2024. This information helps people to better understand how Transpower is performing.Read more -
Transpower’s performance
Here you will find information on Transpower's performance. It is our summary and analysis of Transpower’s public disclosures under Information Disclosure regulation.Read more