Regional Voltage Stability Studies

The regional voltage stability studies are conducted for the Upper North Island (UNI) and Upper South Island (USI) regions.

These studies are carried out as part of the Security Forecast update process for the summer and winter peak loads, to assess any voltage stability issues that may arise due to a low generation scenario.   The analysis of these studies are now included in the North Island Backbone and South Island Backbone sections of Part D of the System Security Forecast.

The following reports are the latest reports:

SSF Part D North Island Backbone [ pdf 1.17 MB ]
SSF Part D South Island Backbone [ pdf 1.06 MB ]