Impact of Switching Three-Phase Breaker at Different Period on Inter-turn Protection for High-Voltage Shunt Reactor

摘要

In this paper, the simulation of inter-turn protection for high-voltage (HV) shunt reactors is studied by using Simulink. Expound that when the closing angles of the three-phase circuit breaker are different, the zero-sequence current and zero-sequence voltage will occur in the system. Demonstrated that during such time, the protection criterion of inter-turn protection will be satisfied in some cases, and thus, the false tripping will occur possibly. Finally, some suggestions are given to avoid the false tripping in the inter-turn protection.