Abstract:Due to the power and voltage constraints of the distribution system,the resource of wind power and hydropower is abandoned in microgrid planning to reduce equipment capacity.Thus,in order to make full use of renewable energy,an optimal configuration of effective and friendly grid-connected microgrid with wind-hydropower and storage is proposed.Firstly,the resource of wind power and hydropower is quantized,and the operation and control strategy of microgrid is determined.Then considering operational constraints of microgrid in distribution system,a multi-objective optimization model is established,with considering the costs of investment and operation,abandoned amount of wind power and hydropower,and annual power generation as objective functions.The model is solved by the non-dominated sorting genetic algorithm (NSGA-II).Finally,the technique for order preference by similarity to an ideal solution(TOPSIS)is adopted to choose the best optimal solution from Pareto solution set based on some indices proposed in this paper.The proposed algorithm is applied to a distribution network in Shaoguan county with multi-scenes,and the result shows the proposed model could improve the utilization of renewable energy and ensure the power quality of the distribution system,and verifies the effectiveness of the model and solution strategy.