Closing date for submissions 5pm Wednesday 11 June 2025
Increasingly, generation units are being connected in groups such as a string of wind turbines, photovoltaic panels or battery cells. If a fault along this string causes the protection scheme to open the circuit breaker, then all connected generating units will be simultaneously disconnected from the station bus.
We as System Operator have examined this risk and proposed a new credible event with for industry consultation. This will introduce a new category of risks considered in our reserve management tool and may result in instantaneous reserve procurement costs being allocated to stations with a group of generating units exceeding 60 MW capacity.
Following the consultation if we decide to progress, all participants with existing or commissioning generating units (including BESS) will be required to self-identify any groups of generating units within their stations by 29th August 2025.
We invite industry participants to comment on this proposal.
Consultation Documents
Providing feedback
Consultation submissions on the Review of generating unit risk when connected in groups should be emailed to [email protected] by 5 pm on 11 June 2025. Submissions received after this date are unlikely to be considered. Please include the phrase “2025 Credible event review of groups of generating units” in the email subject line.