串联故障电弧电流时频域特性的仿真与实验研究康乐1,田云博2,杨騉3,孔国威1,魏杰1(1.北京双杰电气股份有限公司,北京100085;2.长安大学能源与电气工程学院,西安710018;3.国网江苏省电力有限公司电力科学研究院,南京211103)摘要:为了分析和研究低压交流串联故障电弧电流的特性,文中首先搭建了故障电弧模拟实验平台,广泛研究不同负载情况下的电弧电流波形。然后,基于Mayr电弧模型,选取适当参数对故障电弧进行仿真分析。在此基础上,对比分析电弧电流信号仿真结果和实验结果的时频域特性,验证了仿真模型的正确性和可行性。频域特性的分析结合傅里叶变换和小波变换进行,还利用带通滤波器检测了小波分析的准确性。最后,总结出故障电弧电流信号的时频域特点,以此提出了一种低压交流串联故障电弧的检测方法,并对其进行了仿真验证。研究成果对低压供配电系统中串联故障电弧的检测工作具有积极意义。关键词:故障电弧;Mayr模型;小波分析;故障电弧检测SimulationandExperimentalResearchonTime⁃frequencyDomainCharacteristicsofSeriesArc⁃faultCurrentKANGLe1,TIANYunbo2,YANGKun3,KONGGuowei1,WEIJie1(1.BeijingSOJOElectricCo.,Ltd.,Beijing100085,China;2.SchoolofEnergyandElectricalEngineering,Chang’anUniversity,Xi’an710018,China;3.StateGridJiangsuElectricPowerCo.,Ltd.,ResearchInstitute,Nanjing211103,China)Abstract:Inordertoanalyzeandstudythecharacteristicsoflow⁃voltageACseriesarc⁃faultcurrent,thearc⁃faultsimulationexperimentplatformissetupfirstlyinthispaperandthearccurrentwaveformunderdifferentloadiscom⁃prehensivelystudied.Then,basedonMayrarcmodel,thearc⁃faultissimulatedandanalyzedbyselectingappropri⁃ateparameters.Onthisbasis,bothcorrectnessandfeasibilityofthesimulationmodelareverifiedbycomparingandanalyzingthetime⁃frequencydomaincharacteristicofsimulationandexperimentalresultofarccurrentsignal.TheanalysisoffrequencydomaincharacteristicsiscarriedoutincombinationwithFFTandDWT.Moreover,thecorrect⁃nessofwaveletanalysisisdetectedthroughthebandpassfilter.Finally,thetime⁃frequencydomaincharacteristicsofthearc⁃faultcurrentsignalaresummarizedand,onthisbasis,akindoflow⁃voltageACseriesarc⁃faultdetectionm...