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1、配电网单向接地故障的测距摘要摘要：配电网是电力电网系统的重要环节，配电网通过安全而稳定地运行，从而为用电设备提供可靠的电能。配电网的传输线路复杂，而且处在各种各样的环境中，由于其复杂性和多变性，发生电力故障是难免的事。在所有的故障中，单相接地短路故障是最容易发生的。电网故障发生后，在最短的时间内，对故障处进行精准测距和定位，尽可能隔离并排除故障，保证电网的持续正常运行是电力行业亟待解决的问题。但是，由于配电网所处环境等实在复杂，测距定位难度随之加大。当前，对单相接地故障的快速而准确的定位仍然是一个难题。本文进行了配电网单相接地故障测距的研究和探讨。首先介绍了配电网的运行方式和运行原理，然
2、后介绍了配电网单相接地故障产生的原因和危害，对目前存在的各种测距方法的准确性、可靠性进行了切实的研究和细致的分析，归纳整理了各种方法的优缺点，最后在Matlab/Simulink环境下利用SimPowerSystem模块搭建了配电网中性点不接地系统单相接地故障的仿真模型，通过仿真了解其危害，为实现准确故障测距定位，采用合理的排障措施提供思路，从而提高配电网的工作可靠性，为用电设备提供安全可靠的运行环境。关键词：配电网，单相接地，测距，SimulinkAbstractDistributionnetworkisoneoftheimportantcomponentsofthepowersyst
3、em,itssecurity,stability,reliableoperationistoprotectthepeople'spoweroflife.However,thedistributionnetworkcircuitcomplexity,changingenvironment,avarietyoffailureswillinevitablyoccur,inwhichsingle-phasegroundshort-circuitfaultismostlikelytooccurinafault.Whenthegridfails,theshortestpossibletime,tot
4、hepointoffailureforaccuraterangingandpositioning,faultisolationwithintheminimumrange,thusensuringthecontinuednormaloperationofthepowergridisessentialworkerscannotshirkresponsibility.However,thedistributionnetworkresultedinacomplexenvironmentofincreasingdifficultylocatingfaultlocation,thecurrentsi
5、tuation,forfastandaccuratepositioningsingle-phasegroundfaultisstillafullandperfectyetsolved.Thispaperstudiedanddiscussedthedistributionnetworkofsingle-phasegroundfaultlocation.Firstintroducedtheprincipleofoperationmodeandoperationofthedistributionnetwork,andthenintroducesthecausesanddistributionn
6、etworkharmresultingsingle-phasegroundfault,theaccuracyofvariousmethodsrangingexistingreliabilitystudiescarriedouteffectivelyanddetailedanalysis,collateandanalyzetheadvantagesanddisadvantagesofeachmethod,andfinallyintheMatlab/Simulinkenvironmenttobuildadistributionnetworksingle-phasegroundfaultsim
7、ulationmodeltolearnaboutthesingle-phasegroundshortcircuithazardsarisingforcalculatingaccuratefaultlocation,usingreasonablemeasurestoprovidetroubleshootingideastoimprovethedistributionnetworkreliability,providingsafeand
