Parts of an Adelaide power station damaged by an explosion and fire are set return to service as work on more extensive repairs continues.
Three units at Adelaide's Torrens Island Power Station were cut from the network on Friday when a transformer operated by transmission company Electranet failed.
The nearby Pelican Point Power Station tripped and disconnected from the network at the same time, robbing the state of about 600 megawatts of electricity.
The loss of local capacity was compensated by extra electricity moving from Victoria through the Heywood interconnector while solar and wind generation in SA were at high levels.
South Australian consumers also responded to calls to reduce power use.
Electranet said the explosion and fire damaged the connection points on two generating units but work was proceeding to have at least one of those back up and running by Sunday night.
"Our crews in the field are working hard on repair and restoration works and the safety of the public, staff and contractors remains our priority," chief executive Steve Masters said.
"While we do not anticipate any significant issues while repairs are being completed, we want to make sure they are done as safely and quickly as possible."
Work to repair the second unit is expected to take up to two weeks.
South Australian Energy Minister Tom Koutsantonis said an independent investigation would be conducted to determine if the cause of the explosion at Torrens Island was a maintenance issue, the result of faulty equipment or simply an unexplainable event.
But he said power supplies were expected to be sufficient for the rest of the weekend.
That situation should be helped by the usual lower demand on Sunday and milder temperatures forecast across much of SA.
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