Media statement - South Australia
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December 01, 2016 - 12:54 PM
The Australian Energy Market Operator (AEMO) can confirm that at 01:16 AEDT on 1 December 2016, the South Australian power system separated from Victoria, resulting in localised outages in the state for up to an hour, together with the disconnection of the Portland smelter in Victoria.
The separation of South Australia was due to an issue on the Victorian transmission network, impacting the flow via the Heywood Interconnector to South Australia, with the root cause still under investigation.
Approximately 220 megawatts (MW) was lost in South Australia (equating to approximately 200,000 customers) due to the need to balance the frequency of the network. South Australian customers had power restored at 02:45 AEDT. A Victorian smelter was also disconnected from electricity supply as a result of this fault, with power being restored to the smelter from 04:30 AEDT.
At 05:41 AEDT, the South Australian power network had been reconnected to the national grid.
AEMO is working closely with Victorian transmission network service provider AusNet Services to identify the cause of the fault.
Further details will be supplied following further investigation, however it is important to note that this event was not related to the Black System event in South Australia on 28 September 2016.
PDF version available here.
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