Development and experiment of fast breaker-type fault current limiter

摘要

Fault current limiter (FCL) is one of the efficient technological measures to solve the increasingly serious problem of excessive short-circuit current in power grid. A fast breaker-type fault current limiter with modularized design is developed on the basis of 12kV fast-speed vacuum breakers and short-circuit current perfect forecast and zero-cross point precise phase controlled breaking technologies. Zero-loss of the FCL is obtained under normal condition and up to 80 kA short-circuit current could be limited within 20ms to the safe breaking level of the system circuit breaker. The security, efficiency and reliability of the device are verified by field operation and two single-phase transient short-circuit experiment in a 330 kV network.