 The South Australian power grid is operated by ElectraNet and connected to the National Electricity Market via two interconnectors to Victoria.These are the Heywood interconnector (recently upgraded to 650 MW at 275 kV) in the southeast of the state and the Murraylink (220 MW at 150 kV) HVDC further north, connecting Berri to Red Cliffs in Victoria.The Heywood interconnector had been down for upgrade earlier in the year, and was initially blamed for the widespread outage.