Research of Grounding Protection in Smart Power Supply System of Coal Mine Based on Three Layers of Two Networks
Liu Jian-hu · Coal Technology · 2015
Puts forward the ground fault protection scheme based on three layers of the two networks,combined with the sensor technology,computer communication technology and advanced control technology to realize grounding protection in power supply system of coal mine. Analyzing the characteristics and the methods of data sharing in power supply system of coal mine,Synchronized sampling in Merge unit and network structure configuration for grounding protection. Using criterion more comprehensive protection logic,this paper puts forward the sampling value is realized by using the SV message transmission;the protective tripping functions is realized by using the GOOSE message.