For reducing the loss of 10 kV line and improve the economic operation of power grid as well as reactive power compensation for power users

the reactive power compensation capacitor bank which is installed at 0.4 kV side in accordance with the principle of local and near balancenot only bears the reactive power required by the power load

but also the excitation and leakage reactive power required by the transformer.Therefore

the reactive power compensation controller is installed on the 10 kV side to switch the compensation capacitor bank in accordance with the reactive power flowing forward and backward

so that the reactive power flowing at the T-node of the line tends to zero.