The loss reduction of distribution network is coordinated with the user’s energy saving for optimal control of voltage. The feasibility of optimizing the user’s energy saving and the loss reduction of grid is achieved by the voltage optimization in accordance with the voltage feature of load and gird loss. On this basis

the adjustment ability and cost of such voltage regulation equipment as on load tap changing transformer

distributed power supply and capacitor bank etc is considered comprehensively and the voltage control model based on energy saving and loss reduction coordination optimization of the distribution network is established. The improved particle swarm optimization algorithm is adopted for calculation so to obtain the optimal regulation capacity of each voltage regulating equipment in the current optimization period. For improving the calculation efficiency

the simplified topological method of the distribution network is studied so to improve the practicability of the method. Finally

the simulation calculation is performed by the calculation of the real distribution network and the feasibility and effectiveness of the method proposed is verified.