Novel method for protecting subway 10 kV/35 kV ring network power supply circuit

The invention discloses a novel method for protecting a subway 10kV/35kV ring network power supply circuit. The method well solves the problems of overlong actuation time of current protection in a centralized power supply mode, and the selectivity of the current protection in a decentralized power supply mode by reconstructing the circuit breaker protection function of the 10kV/35kV ring network power supply circuit and reconfiguring fixed value setting, and is a simple and convenient subway 10kV/35kV ring network power supply circuit protection scheme with high applicability.