Sylmar HVDC Converter Station East Seismic Design

by Robert P. McBean, Black & Veatch, United States,
W. Tod Sutton, Black & Veatch, United States,

Document Type: Proceeding Paper

Part of: Seismic Design and Construction of Complex Civil Engineering Systems


The Sylmar Converter Station East in Los Angeles receives power from the Northwest via the Pacific HVDC Intertie, a ±500 kV dc transmission line. At Sylmar, the energy is converted to 230 kV ac for distribution to southern California. In 1971, the original station was severely damaged by a major earthquake. Some equipment anchorages, ceramic components, the floor-mounted converter valves, and other components failed. The station was subsequently repaired, and in a current expansion (1986-1989), special efforts were made to construct facilities and manufacture equipment which should resist significant seismic disturbances. This paper describes the seismic design approach for building and equipment for the 1100 MW expansion currently under construction at Sylmar East, near the original facility.

Subject Headings: Seismic design | Seismic tests | Power transmission lines | Facility expansion | Building design | Construction equipment | Power transmission | Load and resistance factor design | California | Los Angeles | District of Columbia | United States

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