Aiming at the three-phase unbalance problems commonly exist in China’s low-voltage distribution network

which seriously affects on operation safety of the distribution network and the user ’s electricity experience

propose that the three-phase electric spring should be used to govern the three-phase unbalance problem. The main circuit topology structure of three-phase electric spring is analyzed

the control strategy of threephase electric spring is introduced

and the controller of three-phase electric spring is designed. Effectiveness of three-phase electric spring in the treatment of three-phase imbalance problem in low-voltage distribution network is simulated and verified. The experimental results show that the three-phase electric spring can effectively govern the three-phase voltage imbalance and stabilize the critical load voltage in low-voltage distribution network.