矿用组合开关用选择性漏电保护的研究

Study of Selective Leakage Protection for Mine Combined Switch

为缩小故障范围,缩短故障排查时间,并且提高供电的可靠性,针对组合开关无选择性漏电保护功能或有局限性的问题,研究了一种基于零序电压和零序电流相位的选择性漏电保护方法。重点介绍了该方法的原理和硬件电路设计。测试结果表明,该方法能满足现场运行的要求。

In order to cut down the fault scope, shorten the fault checking time and improve the reliability of power supply, firstly finds out the combined switch lacking of selective leakage protection function or has the limitation problems. Then the selective leakage protection method has been researched based on zero sequence voltage and zero sequence current phase. Introduces the principles and hardware circuit design of this method. The test result shows that the design can meet the requirements of field operation.