随着采掘机械化程度的提高，工作面走向长度不断加长，千米巷道比比皆是。巷道的延长促使掘进机大量使用，除尘风机等其它辅助设备也逐步得到了应用，这样，原有供电系统的合理性和可靠性就被打破了，致使综掘队供电系统出现了电气安全隐患。图１是典型的综掘队供电系统图，图 With the improvement of mechanization of excavation, the length of the working face is continuously increasing, and thousands of roadways abound. The extension of the roadway has led to the extensive use of roadheaders and other auxiliary equipment such as dust blowers have also been gradually applied. As a result, the rationality and reliability of the original power supply system have been broken, resulting in electrical safety problems for the power supply system of the fully mechanized digging teams. Figure 1 is a typical digging team power supply system diagram, map