Study On The Arc Fault Circuit Breaker Of Mine Power Supply System

In recent years,the rapid development of national economy in our country,people's living standards improve,electrical equipment and power supply and distribution system is becoming more and more complex,resulting in increasing the risk of accidents.In real life,arc fault circuit breaker has a significant role to protect circuit and to prevent fire by arc fault.However,The AFCI which can be used in coal mine power supply system has not been developed.This paper designed a new type of arc fault circuit breaker which is applicable to coal mine environment.For the arc fault in fixed point,particle swarm optimization(PSO)to optimize the BP neural network recognition method of arc fault diagnosis test is proposed in this paper,extract energy spectrum as the characteristics of arc fault current signal,the accuracy and feasibility of arc fault recognition method is verified by the experimental;For the fault arc in internal protection switch cabinet,using double criterion of arc and current detection method.The electric leakage protection function is also joined in hardware circuit,which can better protect and effectively reduce the arc fault of electrical equipment damage from coalmine power supply system.