Research conclusions: The equipments in control center are configured more perfectly, the power supply scheme of the switch station is more reasonable, the problem of channels is solved rationally, the video supervisory control system is applied for the Cast time, and the shortage in measuring distance for failure is pointed out. Moreover, the electric power equipments are indoor ones and all the incoming and outgoing lines are cables. The practical operation has been proved that all performances indexes of system can satisfy the design requirements with stable and reliable operation.