Black Start

Black start is the first step in the process of system restoration in the unlikely event of an island-wide black-out.

Black start can only be carried out by a generating station that can self-start without requiring power from the grid. We need to have this service available in both islands so we could re-energise the power system, and allow other generation to connect, following such an event. 

We may enter into black start contracts with parties who can offer the black start service compliant with our technical requirements and the Code.

Upper North Island Loads

Power system loads in the North Island north of Huntly (Zone 1) are displayed on this page to give power companies loading information across the zone.

This information is updated every five minutes. Due to the location of recording equipment at some sites, the load split between retailers for these zones is indicative only.

The historical Zone Load Peaks are winter and summer seasonal values and are reset at the change of seasons on 20 October and 10 May.


Information contained in the submission for Regulatory Control Period 2 may be found here