Research On Fault Location Method Of Distribution Network With Distributed Generation

As an important bridge connecting users,the safe and stable operation of distribution network is inseparable from the reliable power supply of power grid.Nowadays,due to the advantages of safety and environmental protection,distributed generation(DG)gradually begins to be incorporated into the distribution network,which changes the original distribution network topology,making the distribution network from the traditional single power radial network to multi power complex network,which increases the difficulty of fault location of distribution network.By analyzing the current research status of distribution network fault section,this paper proposes a fault section location method based on FA-PIO algorithm in distribution network with DG.Firstly,this paper introduces the concept and access criteria of distributed generation,expounds the fault location principle of traditional distribution network,analyzes the impact on distribution network fault location from the location of distributed generation connected to distribution network,and summarizes the impact of distributed generation located upstream and downstream of fault section and fault section not at the same feeder on FTU uploading fault current.Secondly,for the pigeon swarm algorithm is easy to fall into local optimization in the process of iterative optimization,this paper proposes a combination with fireworks algorithm.The initial population of the pigeon population is enriched by using tent chaotic mapping.At the same time,the formula of the number of pigeons in the pigeon population algorithm is improved in an adaptive way to preserve the diversity of the population.The fireworks algorithm is used to make Gauss mutation disturbance to the pigeon group algorithm,which increases the active ability of the pigeon group and makes it jump out of the local optimum.Six classical functions are used to test the FA-PIO algorithm.The simulation results show that the method improves the convergence ability and optimization ability of the algorithm.Finally,the FA-PIO algorithm is applied to the fault section location of distribution network with DG.The coding method is redefined,and the connection function and evaluation function suitable for distribution network with DG are constructed.Through the simulation experiment of ieee33 node distribution network model,the convergence ability and fault tolerance of the algorithm are analyzed under the conditions of single point fault,multiple faults and information distortion.Simulation results show that the algorithm has strong convergence ability and good fault tolerance,and can be applied to the fault section location problem of distribution network with DG.There are 36 figures,12 tables and 60 references in this paper.