Transpower as System Operator prepares assessments and reports on system events and situations that might pose risks to system operations.
|Feb/ Mar 2023
Southland Low Generation
Low hydro inflows in the Southland region had the potential, if the situation had worsened, to lead to security issues. This report outlines the potential issues and reconfiguration options.
|14 Feb 2023
Flooding during Cyclone Gabrielle caused extensive damage at our Redclyffe substation in Hawke’s Bay, resulting in the loss of electricity supply to Hawke’s Bay and Tairāwhiti.
SO full report - Hawkes Bay loss of supply.pdf (PDF 2.07 MB)
|9 Aug 2021
Grid Emergency: Shortfall event
On 9 Aug 2021 the country faced the largest demand peak in response to one of the coldest nights of the year. As system operator, we called a Grid Emergency when insufficient generation was available to meet demand, leading to some customers being disconnected. A number of reviews of this event are underway including an independent review commissioned by Transpower to help us understand the event and industry’s response on the night, to identify where we need to make changes. As system operator, we have a programme of work underway to address recommendations from each of the reports, which includes industry engagement.
Reports and information relating to this event are located here.