The Celilo Converter Station of the Pacific HV-DC Intertie

The design and layout for one of the first HV-dc converter stations (1440 MW) in the United States to be located near "The Dalles," Ore., is described. The coverage ranges from the incoming 230-kV ac buses with the harmonic filters, grid timing supply, etc., through the converter transformers, valve groups, and control, to the ±400-kV outgoing dc buses with the smoothing reactors. The dc system, of which this terminal is a part, will have an 827-mile overhead transmission to the southern terminal at Los Angeles, Calif.