煤矿供电继电保护系统整定的对策

Strategy of Setting the Power Supply Relay Protection System in Coal Mine

针对目前煤矿供电继电保护系统6 kV三段方式存在的问题,从电流互感器的饱和倍数、瞬时电流速断保护范围及上下级选择性配合进行了分析,提出了相应可靠的解决方案,并对电流速断保护范围存在盲区的问题,给出了瞬时电流闭锁电压速断保护的解决方法。

Aiming at the problems existing in the part of 6 kV three mode of power supply relay protection system in coal mine, the saturation of current transformer, the protection range of instantaneous current and the selective coordination of upper and lower levels were analyzed. The corresponding reliable solution was put forward, specific to the current speed off the protection of the blind area of the problem, the instantaneous current blocking voltage quick break protection calculation method was given