Research On Fault Location Of Power Distribution Network Based On WSN

The existing distribution automation system has less remote real-time monitoring data,which results in limited methods for fast locating and timely handling faults.However,the fault location method combining advanced sensing technology and communication technology can further improve the function of the current distribution automation system.Therefore,it is of great significance and value to study the application of wireless sensor network(WSN)in fault location of power distribution network.This paper mainly studies the application of WSN localization algorithm in power distribution network fault node location.A variety of localization algorithms are compared and analyzed through literature survey,among which DV-Hop(Distance Vector-Hop)algorithm has the advantages of low hardware requirements and wide application range.However,DV-Hop algorithm has the disadvantage of large location error,so this paper studies and improves the DV-Hop algorithm,thereby reducing the location error of the algorithm.The main work of this paper is as follows:(1)Aiming at the problem of low location accuracy when DV-HOP algorithm is applied to power distribution network.This paper proposes a novel localization algorithm based on Dynamic Parallel Harris Hawks Optimization(DPHHO)algorithm,named DPHHO-DV-Hop.Firstly,the DPHHO-DV-Hop algorithm uses a weighted average hop distance strategy to correct the average hop distance of unknown nodes.Secondly,the dynamic control strategy of escape energy and parallel communication strategy are introduced to improve the Harris Hawk Optimization algorithm,and the DPHHO algorithm is proposed.The optimization performance of DPHHO algorithm is verified by benchmark test functions.Thirdly,DPHHO algorithm is used to solve the coordinates of unknown nodes,and the problem of solving the original unknown node coordinates is transformed into solving the optimal value of the objective function.The experimental results show that,compared with DV-Hop and other localization algorithms,the proposed DPHHO-DV-Hop is an effective algorithm for the localization of WSN.Finally,aiming at the node location of distribution line fault location,the topology model of WSN node distribution line is established by MATLAB simulation software,and the simulation test verifies that DPHHO-DV-Hop algorithm is more available in the node location of distribution line fault location.(2)In order to further improve the location accuracy of DV-Hop algorithm for distribution line fault location nodes.On the basis of DPHHO-DV-Hop algorithm,a novel localization algorithm based on adaptive multi-group slime mould algorithm(AMSMA)is proposed,named AMSMA-DV-Hop.This algorithm first improves the slime mold algorithm by introducing an adaptive inter-group communication strategy,thus proposing AMSMA,and verifying the optimization performance of AMSMA through the benchmark test function.Then,the AMSMA was used to optimize the location of the unknown node.The simulation results show that the AMSMA-DV-Hop algorithm is superior to the DPHHO-DV-Hop algorithm in location accuracy.Finally,the AMSMA-DV-Hop algorithm is used to locate the fault location node.The simulation results show that the AMSMA-DV-Hop algorithm further improves the location accuracy of DV-Hop algorithm for distribution line fault location node.