A Microgrid Topology Design and Evaluation Method based on Power Router

In order to solve the problem of large-scale and multi type distributed generation, energy storage and electric vehicle flexible load access, a multi energy complementary microgrid solution based on power router is proposed. This paper puts forward three energy supply schemes based on power router to realize the flexible access and efficient management and control of distributed generation, energy storage, flexible load and other units of different voltage levels. Secondly, a comprehensive evaluation index system based on reliability, economy, high quality and environmental protection is constructed. The weights of each element are determined by the subjective and objective weighting method of AHP-EWM method, and the accuracy of weight is improved by using combination weighting method. Finally, the comprehensive evaluation is carried out through the gray correlation analysis method. Taking data center station, electric vehicle charging station and AC load power supply in substation as examples, three alternative power supply schemes are systematically evaluated, and the results show that the evaluation method is effective.