Fault Location Analysis Of Distribution Network Based On Transient Traveling Wave

At present,with the increasing severity of the global fossil energy crisis and the increasing environmental pollution,electricity as a clean energy,has been more and more widely used in the world’s energy use,and in the power system,the distribution network as an important part of the society is becoming more and more important.The distribution network has many branches and complex structure,so it is difficult to locate after fault.Therefore,it is very important to find an effective distribution network ranging method.In order to solve the problem of fault location in distribution network,this thesis firstly discusses the research status of fault location in distribution network at home and abroad,compares the advantages and disadvantages of several methods of fault location and location in distribution network;on the basis of studying the generation and transmission characteristics of fault traveling wave in distribution network,analyzes in detail the influence of different branches on fault traveling wave and the frequency dependent characteristics of modulus,inductance and resistance Secondly,the topological structure and main components of the distribution network are analyzed,and the configuration of traveling wave detection device for the distribution network is carried out under the double constraints of observability and economy,and an optimization scheme of traveling wave detection device for the distribution network based on the line length is proposed.On the basis of previous work,combined with single terminal method and double terminal method,the fault location of distribution network is carried out,and the A-type single terminal location method is improved to solve the problem of false fault point of distribution network.Finally,the thesis uses MATLAB simulation software to build the distribution network fault model,and the simulation verifies the feasibility of the proposed optimal configuration scheme of traveling wave distance measurement and the accuracy of fault line selection and location method.In this thesis,the optimal configuration of traveling wave and the improved single terminal ranging algorithm are optimized to solve the problem of pseudo fault point on the premise of satisfying the observability of distribution network.At the same time,the traveling wave ranging theory of single terminal method and double terminal method combines different fault analysis methods,which makes the ranging method proposed in this thesis more applicable.