矿用低压馈电开关选择性漏电保护的研究

Research on Selective Leakage Protection of Low Voltage Feed Switch for Min e

对井下低压电网单相漏电故障及相关参数进行了分析,介绍了选择性漏电保护原理的特点。根据漏电故障选线方法的适用范围和局限性,研究和分析了附加直流电源检测法和零序功率方向法的漏电保护原理,并指出了2种方法配合使用的重要性,有效地解决了井下低压馈电开关选择性漏电保护的问题。

Made a analysis of the single phase leakage fault of underground low voltage power network and related parameters, and introduced the characteristic of selective leakage protection principle. According to the scope of application and limitations of line selection method of electric leakage fault, this article researched and analyzed the leakage protection principle of additional DC power supply detection and zero sequence power direction, and pointed out the importance of the two ways of which to cooperate with the use, it effectively solved the problem that selective leakage protection ofunderground low voltage feed switch.