South West Interconnected System
The South West Interconnected System is an electricity grid in the southwestern part of Western Australia. It extends to the coast in the south and west, to Kalbarri in the north and Kalgoorlie in the east.
The SWIS consists of both the South West Interconnected Network and its electricity generators. The South West Interconnected Network is operated by Western Power, owned by the Western Australian government, and includes over 7800 km of transmission lines, and over 93,000 km of distribution lines.
Some of the generators are owned by the government through Synergy and others are privately-owned. Wholesale trade in electricity across the SWIS is managed by the Australian Energy Market Operator through the Wholesale Electricity Market which began operation on 21 September 2006.
