Alaska Interconnection

The Alaska Interconnection (ASCC) is an AC power transmission grid in North America that serves Central and Southeast Alaska. While the Alaska Interconnection is often referred to as one interconnected grid, its two parts are not connected to each other through interties, nor are the two grids connected to any other interconnection, making the grids in Alaska isolated circuits. However, both grids are managed by the Alaska Systems Coordinating Council. Because the transmission networks in Alaska are isolated from other interconnections in North America, average rates for electricity are $0.18 per kWh - the second highest price in the United States after Hawaii, whose average residential rate is $0.37 per kWh. In contrast, the average rate for electricity in the 48 contiguous states is $0.10 per kWh.

The Alaska Interconnection is the smallest individual power transmission grid in North America compared to the three other major interconnections - the Western Interconnection, the Eastern Interconnection, and the Texas Interconnection - both in physical area and electricity generated. In 2015, the Alaska interconnection generated 2,601 gigawatt hours of electricity, with natural gas accounting for 1,219 GWh, while the US State of Washington alone - part of the Western Interconnection - generated 47,385 GWh. In 2014, an intertie to the Western Interconnection of British Columbia was proposed to the Alaska Energy Authority in order to bring cleaner cheaper power to Alaska, but as of 2016, no further work on the project had been completed due to economic feasibility.

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