The SWIS has transmission out to Kalgoorlie and the South Australian network reaches Woomera - those are 1500km apart as the crow flies, but the transmission li

The SWIS has transmission out to Kalgoorlie and the South Australian network reaches Woomera - those are 1500km apart as the crow flies, but the transmission lines out to those places wouldn't have enough capacity for a worthwhile interconnection so you'd have to go further.