Abstract: The software and hardware of unattended substation secondary equipment are prone to system crash or crash and other fault defects,and the dispatching center has a hard reset requirement. The traditional process requires the operation and maintenance personnel to formulate the maintenance work plan and make an invoice,and the personnel rush to the substation to restart the equipment power supply.The whole process wastes human,material and financial resources,and the recovery time is long,which is not conducive to the safe and stable operation of the power grid.A remote control and management device for power supply of substation equipment was developed.The optical fiber special network in the power station was used for communication,and the remote voltage control closing logic relationship program was constructed to realize the TCP connection between the power remote control device and the telecontrol communication device.According to TCP/IP protocol communication or RS485 serial port connection mode,the remote control of power supply on-off and restart equipment was realized by using advanced instruction microprocessor（Acorn RISC Machine,ARM）processing and relay control units.The developed device reduces manual operation cost,saves equipment recovery time,ensures the stability of communication connection of power station equipment,ensures the reliability of substation equipment operation,and effectively improve the real-time monitoring capability of power grid.