Application Of Fault Location Algorithm In Distribution Network

Environmental issues have attracted increasing attention in China in recent years.In the China’s National People’s Congress(NPC)and Political Consultation Congress(PCC)in 2021,"carbon peak" and "carbon neutral" were written into the government work report for the first time,advocating green production and living,reducing the use of high-carbon fossil energy,and vigorously developing clean energy and new energy.In the electric power industry,the proportion of clean energy is constantly rising,and the distributed generation technology with flexible,clean,low carbon and environmental protection has been rapidly developed.At the same time,the access of distributed power makes the structure of distribution network change from single power supply mode to multi-power supply mode.After the failure of the distribution network,there are a series of problems to locate the fault interval,which leads to the extension of the blackout time.Therefore,it is of great significance to study fault interval location of distribution network with DG to improve the reliability of power supply and reduce the outage time when the fault occurs.In this paper,the model of distribution network with DG is built in the simulation software of Matlab2016 a to study how to realize fault interval location after distributed power access.First of all,the analysis of the effect of the distributed power supply access to distribution network,and in allusion to the problem of the existence of to build switching function and fitness function containing distributed power distribution network,combined with concrete examples,using Harmony search(HS)simulation analysis,from the simulation results verify the HS convergence and the accuracy of fault location algorithm.Secondly,the disadvantages of HS are combined to improve it,mainly by combining Grey Wolf Optimization(GWO)and reverse learning mechanism with HS,so as to increase the convergence and improve the performance of HS.Finally,the improved HS program is written in the simulation software Matlab2016 a,and the fault location simulation analysis is carried out in the actual engineering.The results show that the improved HS can accurately locate the fault location and has a high convergence.