Field test of HVDC circuit breaker: Load break and fault clearing on the Pacific intertie

Abstract
A fast-acting HVDC Circuit Breaker was tested on the Pacific HVDC Intertie System. The Intertie was operated as a three-terminal system with the breaker located on one branch. Intentional faults were applied close to the breaker and 250 miles away and successfully cleared. In load-break tests the breaker disconnected one branch of the system without problems.

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