System security and resilience
Industry Exercise
An annual simulation exercise for electricity market participants to rehearse and reinforce processes and communications for managing and responding to a major power system event.
Overview
The Industry Exercise 2025 was a desktop exercise that had four phases to simulate the timeline of an extended electricity supply shortage that resulted in rolling outages.
We’ve pulled together key insights from the exercise, and we ask all participants to action the recommendations which will help strengthen our collective readiness for a major power system event and minimise the impact on New Zealanders.
Timeline
-
-
-
9 April 2025
Exercise —Industry Exercise 2025 - rolling outages
-
4 & 18 March 2025
Event —Rolling outages process and preparing for the Industry Exercise
-
-
-
-
Project background
The Electriciy Authority and Transpower committed to annual industry exercises after the grid emergency on 9 August 2021 that caused a significant power outage affecting more than 34,000 households in New Zealand.
Exercises aim to confirm, and build trust and confidence in, the industry’s ability to appropriately manage an unexpected major power system event and minimise the impact on New Zealanders.
The first exercise was run in 2022 and has continued annually. It's an important opportunity for electricity market participants to test and rehearse processes for managing and responding to an unexpected event and to identify and action improvements to incident response.
Other projects in System security and resilience
View all projectsFuture security and resilience
Ensuring our electricity system remains secure and resilient for New Zealand's low-emissions energy transition.
Unlocking the benefits of battery energy storage systems
We’re working to ensure we have the right regulatory settings in place to unlock the benefits of battery energy storage systems.
Energy margin information
Collecting financial information from large generators to calculate energy margins for insights into profitability in various market conditions.