Multiobjective Decisions on Microgrid Interconnection Location Based on Fuzzy Clustering

The interconnected location of the microgrid is related to the stable operation of both the distribution network and microgrid. This paper used the sitting of microgrid as a foothold to reduce the impact of voltage deviation and network loss after microgrid connection to the distribution; a method on the interconnected location of the microgrid based on multiobjective decision is proposed. This method synthetically considers the voltage deviation, network loss, voltage improvement level, network loss improvement level and static voltage stability index after the microgrid is connected to the distribution network. First, the microgrid is respectively connected to each candidate node in the distribution network system, and the five selected indexes of each node are calculated according to the power flow. Then, by constructing the ideal optimal object and the ideal worst object, the candidate nodes are divided into three categories by means of fuzzy clustering. The Euclidean distance method is then used to further refine the clustering results to realize the sorting of the candidate nodes. Finally, the accuracy and rationality of the sorting results are verified by the simulation results of a typical microgrid connected to an IEEE14 distribution network.