Key Documents

This section contains key System Operator documentation.
This page lists agreements we have in place with other parties to assist with managing the power system.
This page lists useful maps and diagrams of the New Zealand power system.
Regional voltage stability studies are conducted on the New Zealand power system for the Upper North Island (UNI) and Upper South Island (USI) regions.
This page lists publicly released reports prepared by the System Operator over the last five years.
The Electricity Industry Participation Code requires the System Operator to complete a self review of it's performance. This page lists Self Reviews since 2008.
The System Security Forecast (SSF) is a forecast of the System Operator’s ability to meet the Principal Performance Obligations over the next three years.
From time to time the Electricity Authority asks Transpower to provide technical advisory services, referred to as TAS (Technical Advisory Services).