Renovation and Optimization of Operation Mode of Dual-circuit Power Supply System in Coal Mine

For the problem that most dual-circuit power supply systems in coal mine underground could not accord with requirements of version 2009 of Coal Mine Safety Regulations, the paper presented a way of renovation and optimization of operation mode of dual-circuit power supply system, and pointed out that dual-circuit power supply system which uses parallel operation mode still has a problem of uneasy switchover caused by electric resetting and the problem should be further researched.