现代化企业中，有数量众多、容量大小不等的感应设备 (如异步电动机 )联接于电力系统中，以致于电网传输的功率除供给有功功率外，还需供给大量的无功功率。工矿企业对电网无功需求容量的增加，导致了电网电流增大，供变电设备容量增加，输电线路功率损耗变大，供电网络电压 In modern enterprises, there are a large number of sensing devices with different sizes (such as asynchronous motors) connected to the power system, so that the power transmitted by the power grid needs to supply a large amount of reactive power in addition to the active power. Industrial and mining enterprises on the grid reactive power capacity increases, resulting in the grid current increases for the capacity of substation equipment, transmission line power loss becomes larger, the supply network voltage