According to the current energy trends, the paper designs a power supply device to keep the Power Supply Platform that the solar power as the main energy, meanwhile the Storage Battery and alternating current as the minor energy working normally. The device has the function of switching the power supply to achieve the uninterrupted power supply to loading in any environment so that will output DC stably and carry three charging to the Storage battery. Through the Ps-pice software simulation results show that the modules can meet the design requirements. It can achieve the results of switching power and select function of the Storage battery power charging module through controlling circuit by Proteus simulation software. The power supply device has the advantages of high reliability.

According to the national policy of energy conservation and emissions reduction, using renewable resources and new energy to reduce environmental pollution. Reforming power distribution network system for housing estate in taiyuan. Access to distributed power supply, researching the exact location and capacity. By analyzing the distributed generation of the impact of distribution network,the objective function including investment and operating maintenance cost, environmental factors, network loss costs; putting power flow , current, voltage, system capacity constraints as constraint conditions, Using particle swarm optimization (PSO) algorithm with inertia weight, determine the location and capacity of distributed power supply. The proposed method is testified on the IEEE-33 bus system,and get the reasonable installation position and capacity, the simulation results will be used in transformation housing estate in taiyuan.