井下中央变电所是煤矿生产的枢纽部位,担负着为全矿的采面生产、通风及照明等提供可靠电力的重大责任,中央变电所的可靠运行关系着煤矿的稳定安全生产。在中央变电所中.高压系统因其电压较高,结构较复杂.对其各方面的要求更加严格。山东里彦煤矿35 kV 中央变电所从1996年建矿至今.已经稳定运行了12a,为矿上的生产提供稳定的电力供应。但从建矿至今十几年的运行,变电所原供 Underground underground substation is the hub of coal production, responsible for the whole mine face production, ventilation and lighting to provide a reliable power of the major responsibility for the reliable operation of the central substation is related to the stable and safe production of coal mines. In the central substation, the high-voltage system is more complex due to its higher voltage, and its requirements are more stringent in all aspects. The 35 kV Central Substation of Shandong Liyan Coal Mine has been established since 1996 and has been operating steadily for the purpose of providing a stable power supply for mine production. However, since the construction of mine more than 10 years of operation, the original substation