Study On Optimal Allocation Of Distributed Generation And Reconfiguration Of Distribution Network

At present,the combination of DG(Distributed Generation)and traditional generation has become the future trend of electric power field which is attracted the attention of domestic and foreign sectors.Also,the development of DG technology provides a good solution to the security issues of global energy.Therefore the optimal allocation of DG and reconfiguration of distribution system with DG are studied in this paper.First of all,the power flow calculation models for different types of DG are established,and then the power flow calculation of IEEE 33-node power system is carried out by using the improved power flow calculation method of weak ring distribution network with DG.The influences of different types of DG on the voltage stability of distribution network are discussed by examples.On the basis of establishing the optimal allocation model of DG with two goals including active power loss and static voltage stability,a regional optimal allocation method is adopted,and the algorithm is designed by quantum particle swarm optimization.The simulation tests on different schemes in the IEEE 33-node and PG&E 69-node system show the influences of different types of DG on the distribution network.The reconfiguration model of distribution network with DG is established with the goal of active power loss.The integer ring coding method is used to realize the integer coding quantum particle swarm optimization,the switch-loop matrix and node-stratified method are used to distinguish the infeasible solution,that can improve the optimization efficiency.The simulation calculations of different schemes in the IEEE 33-node and PG&E 69-node distribution system prove the feasibility,accuracy and validity of methods in this paper.