针对目前煤矿110 kV变电所设备自动保护水平不高的问题,提出了一种基于PLC的变电所保护系统,介绍了系统实现原理与与实现方法,该系统以PLC完成了对井下变电所内运行设备工作状态及重要参数的实时监控,对变电所设备进行了自动保护,为实现井下变电所无人值守奠定基础。 Aiming at the problem that the level of automatic protection of equipment in 110 kV substation is not high at present, a substation protection system based on PLC is presented. The principle and implementation of the system are introduced. The running status of the equipment and real-time monitoring of important parameters, the automatic protection of the substation equipment, laid the foundation for the realization of underground substation unattended.