Information for Industry

Key information for electricity industry participants.
Transpower as the System Operator has commenced analysis to determine what the impacts of Tiwai’s exit in December 2024 will have on the operation of the power system and security of supply.
This page shows the HVDC overload limits used by the market system to model the under frequency instantaneous reserves (IR) required for a HVDC Contingent Event (the loss of a HVDC pole)