Abstract: A multi-objective distribution network reconfiguration algorithm based on loop group search strategy is proposed to reconstruct the distribution network with distributed generation (DG). The network is divided into several basic loops by loop coding to reduce the search space. At the same time, taking the minimum active power loss, the minimum voltage amplitude offset and the minimum switch operation times as the objective functions, the above objective functions are normalized and integrated into a single objective function by using the analytic hierarchy process (AHP), which reduces the search dimension and improves the search efficiency of the algorithm. Then the variable neighborhood search (VNS) is introduced to improve the binary particle swarm optimization (BPSO) algorithm, so that it has better global search ability. Finally, the analysis of the PG & E69 node calculation example with DG shows that the optimization efficiency of the improved algorithm is significantly improved, the objective function value is also better, and all the situations of the reconstructed distribution network are significantly optimized.

    Key words: optimization and reconfiguration; distribution network; loop group search; analytic hierarchy process; variable neighborhood search