The High-Voltage D-C Test Program of the onneville Power Administration

On December 15, 1961, a Task Force of the United States Department of the Interior completed an extensive study, which resulted in a recommendation for at least one, and ultimately perhaps two or three EHV (extra-high-voltage) circuits to intertie the systems of the Pacific Northwest and the Pacific Southwest. The assumptions will operate successfully. Task Force report found 750-kv direct current (±4375 kv) to be the most economical for these lines. See Fig. 1.1,2