10kV配电电缆绝缘耐压与局放一体化测试方法研究沈谢林1,王利2,郭建钊1,钱渊泉1,杨赛柯2,李洪杰2(1.国网福建省电力有限公司泉州供电公司,福建泉州362000;2.西安交通大学电气工程学院,西安710049)摘要:振荡波与超低频正弦测试技术是电力电缆绝缘状态检测的有效方法。文中提出了一种新型的超低频正弦与振荡波一体化测试技术,能够大大提高现场检测效率。该方法在传统串级倍压电路拓扑结构的基础上,创新性地拓展了其功能,研制了电缆测试的一体化系统,可以实现电缆绝缘的超低频正弦耐压以及振荡波局部放电一体化测试。文中针对所提出的系统,详细分析了两种不同电压的产生原理及其波形特性,并利用MATLAB/Simulink进行仿真分析,进一步验证了该一体化测试方法的可行性。最后,建立了实验室样机系统,通过实验室测试,证明该一体化系统的合理性。关键词:一体化绝缘检测技术;配电电缆;振荡波;超低频;局部放电ResearchonIntegratedMethodforWithstandingVoltageandPartialDischargeTestof10kVPowerCableInsulationSHENXielin1,WANGLi2,GUOJianzhao1,QIANYuanquan1,YANGSaike2,LIHongjie2(1.StateGridFujianElectricPowerCo.,Ltd.,QuanzhouPowerSupplyCompany,FujianQuanzhou362000,China;2.SchoolofElectricalEngineering,Xi’anJiaotongUniversity,Xi’an710049,China)Abstract:Oscillatingwaveformandverylowfrequency(VLF)testtechnologiesareeffectivemethodsforinsulationstatedetectionofpowercable.Inthispaper,akindofanewtypeofVLFwithsinusoidalwaveformandDACintegrat⁃edtesttechnologyisproposed,whichcangreatlyimprovedetectionefficiencyatsite.Themethod,onthebasisoftra⁃ditionalcascadevoltagedoublingcircuittopology,innovativelyexpandsitsfunction.Theintegratedsystemofcabletestisdeveloped,whichcanachieveintegratedtestofVLFwithstandingvoltageandPDofoscillatingwaveform.Inviewofthesystemproposedinthispaper,thegenerationprincipleanditswaveformcharacteristicoftwokindsofdif⁃ferentvoltagesareanalyzedindetail.ThesimulationanalysisisperformedbytheuseofMATLAB/Simulinkandthefeasibilityoftheintegratedtestmethodisverifiedfurther.Finally,theprototypesystemofthetestlaboratoryissetupandthepracticabilityoftheintegratedtestsystemisprovedfurtherbythetesti...