When the distribution system goes wrong

the affected loads get disconnected and service should be restored through a network reconfiguration procedure.The impact of distributed generation（DG） on the distribution system during service restoration and network reconfiguration is investigated

and the mathematical model of network reconfiguration with DG is built.The objective function and constraints are modified

and DG and power quality factors are discussed.A method based on modified binary particle swarm optimization（BPSO） is applied to solve network reconfiguration problems

tested in the IEEE69 system.The results showthat the model is effective and reasonable.