Transmisson tower from sky view

The Australian Energy Market Operator (AEMO) advised that the South Australian electricity transmission network separated from Victoria at 1:03 am this morning, after a fault on the Victorian transmission network triggered the South Australia – Victoria (Heywood) Interconnector to disconnect in Victoria.

There were no faults on the South Australian transmission network, however, around 200,000 SA Power Networks customers were affected by blackouts.

AEMO advised that approximately 220 MW of load was shed to balance the system, and some large users were temporarily constrained.

AEMO advised that South Australian customers had power restored a little over an hour later, at 2:15 am, and the South Australian network was then reconnected to Victoria and the National Electricity Market shortly after 5:00 am.

AEMO advised that the separation and resulting blackouts were caused by an issue on the Victorian transmission network.

AEMO is working with the Victorian transmission network operator AusNet Services, to identify the cause of the fault, and AEMO will make further information available following their investigations.


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About ElectraNet

ElectraNet provides energy and infrastructure solutions across Australia. We own and operate over $2.5 billion of electricity transmission assets that transport electricity over long distances and to remote areas. A critical part of the electricity supply chain, ElectraNet’s transmission network delivers safe and reliable electricity supply. Our transmission costs make-up less than 10% of end-user electricity prices.

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