Report on 2 March 2017 South Island AUFLS Event

On 2 March 2017, New Zealand experienced a major and complex power system event. The event resulted in the South Island power system splitting into two separate systems. Approximately 120 MW (16%) of electricity used by consumers in the upper part of the South Island was disconnected for up to 90 minutes.  

This report provides the findings from the System Operator's investigation into the event.