以小水电供电为主的县,不论是与大电网并网运行,还是以县为单位形成独立小电网,其无功不足的状况是同样存在的。但是,不少县级电网忽视了利用水电站的水轮发电机组调相运行,向电网输送无功来弥补电网无功的不足。1水电站调相运行的2种方式1.1水轮发电机组不分开 County-based power supply, whether it is grid-connected operation with large power grids, or the formation of an independent small power grids by county, its reactive power shortage situation is the same. However, many county-level power grids neglect the phase-shifting operation of hydroelectric generating units that use hydropower stations to transfer reactive power to the grid to make up for the lack of grid reactive power. 1 hydropower phase modulation operation of the two ways 1.1 hydroelectric generating units are not separated