Feeder reconfiguration for unbalanced distribution systems with distributed generation: a hierarchical decentralized approach

摘要

Most existing approaches for distribution network reconfiguration assume that the distribution system is (three-phase) balanced and a single-phase equivalent is used. However, distribution feeders are usually unbalanced due to a large number of single-phase loads, nonsymmetrical conductor spacing, and three-phase line topology. This paper builds on our previous work and studies feeder reconfiguration for unbalanced distribution systems with distributed generation (DG). The location and capacity of three-phase DG units are determined using sensitivity analysis and nonlinear programming, and the distribution feeder is reconfigured based on the status of time-varying loads, output power from DG units and faults on the network while minimizing the DG operating costs. Simulation results show the effectiveness and computational efficiency of the proposed approach.