PC-WGZK-II type of substation reactive power compensation controller applied to 110kV~35kV transformer substation (), according to the main transformer low voltage side reactive power, low-voltage side of bus voltage, integrated control installed in a low voltage bus capacitor switching. With real-time control of low voltage bus capacitor switching to achieve a balance of supply and demand. Can significantly improve the substation low voltage Busbar voltage, reduced into the line of reactive power in substations to reduce line loss, to improve power transmission capacity.