Research On The Reconfiguration Of Distribution With Distributed Generation Based On IGSO-PSO

With the development of modern power grid,the construction and application of power distribution automation system has been put forward higher requirements.Distribution network reconfiguration is one of the most important functions of distribution automation.As a means of optimizing the distribution network,it can improve the power quality and economy of the distribution network,and ensure the safety and stability of the power system,which has certain research value.Distributed generation is used as a small independent power supply combined with traditional power supply to save power supply in remote areas and improve power supply reliability.“Open loop distribution network topology design,closed loop operation” was changed because of the addition of DG,therefore,the traditional distribution network reconfiguration method can not be effectively applied to the actual system.The static reconfiguration and distribution network dynamic reconfiguration with distributed generation are studied in this thesis,the main contents are as follows:(1)Different types of distributed generation are introduced.According to the working principle and the influence analysis of power distribution and power quality,it is divided into PQ,PV,PI and PQ(V)types according to the interface type,and the mathematical model is established to make a good foundation for distribution network reconfiguration.(2)In terms of static reconfiguration of distribution network,the advantages and disadvantages of the particle swarm optimization algorithm and the growworm swarm algorithm are analyzed,the minimum spanning tree(MST)method and improvement of the glowworm swarm algorithm are combined in this thesis,an objective optimization mode which regards network loss and load balancing as the objective functions was established.In IEEE33 node distribution network with DG as an example,the validity of the proposed method is verified by simulation results of example.(3)In terms of distribution network dynamic reconfiguration,load-variation in practical network is considered,a clustering techniqued based on load pattern index is applied to the load clustering of distribution network,and the dynamic reconfiguration of distribution network was converted to the multiple static reconfigurations,in which the load of distribution network is represented using the corresponding cluster center.