The Australian Energy Market Operator (AEMO) advises that at 10:51pm (Australian Eastern Daylight Time) on Sunday, 1 November 2015, an incident at transmission network service provider ElectraNet’s South East substation in South Australia, impacted electricity supply from Victoria to South Australia via the Heywood Interconnector.
Approximately 160-170 megawatts (MW) of load was lost as a result of this incident, causing electricity supply disruptions across regions of South Australia.
Service was restored at 11:26pm (Australian Eastern Daylight Time) with load restoration commencing shortly thereafter.
This was not a planned outage and the cause of the substation fault is under investigation.
AEMO is closely monitoring the situation and is working with ElectraNet, SA Power Networks, and the South Australian Government on this matter.