Draft Security of Supply Assessment 2023 (Closed)

Submissions closed 26 May 2023 

Transpower, as the system operator, is responsible for publishing the medium-term security of supply assessment (SOSA) annually. This assessment provides a 10-year assessment (2022 to 2031) of the balance between supply and demand in the New Zealand electricity system.

Its purpose is to inform risk management and investment decisions by generators, other market participants, and investors.

It forms part of New Zealand’s electricity security of supply framework. The system operator performs other security of supply-related functions described in the Security of Supply Forecasting and Information Policy (SOSFIP) and the Emergency Management Policy (EMP).

We sought feedback on the draft 2023 SOSA to consider prior to the final publication. We will release the final SOSA and publish feedback before the end of June.

The following documents were made available for information and comment: