文档名：基于旋转圆柱三电极阵列的覆冰测量方法
摘要：覆冰严重会影响电网安全稳定运行,输配电装备的覆冰监测是电网冰灾防御的前提.为此,基于冰层的电容效应提出一种旋转圆柱三电极阵列覆冰测量方法.首先,推导电容值与覆冰厚度计算公式,从理论上说明该方法的可行性;其次,建立圆柱三电极阵列有限元模型并对其结构参数进行有限元数值计算;再次,以信号强度、灵敏度与穿透深度为评价指标对圆柱三电极阵列选取合适参数;最后,在野外自然环境下对旋转圆柱三电极阵列覆冰测量装置进行试验.仿真和试验结果表明,在穿透深度以内,旋转圆柱三电极阵列能够较为准确地测量覆冰厚度、分辨覆冰类型.在雨凇、混合凇覆冰条件下,覆冰电容值平均误差最大为4.83%,能够满足覆冰厚度的测量要求.该文为输配电装备覆冰监测提供了一种新型装置与测量方法,未来有望应用于架空线路覆冰在线监测.
Abstract：Icingseriouslyaffectsthesafetyandstabilityofpowersystem.Icingmonitoringofpowertransmissionanddistributionequipmentisaprerequisiteforpreventingicingdisaster.Theicemeasurementmethodbasedoncapacitiveeffecthastheadvantagesofsimplemeasurement,highsensitivityandeasilyintegrated.However,undertheconditionofwing-shapedicingandcrescent-shapedicing,theexistingmethodsarelimitedbythesingleelectrodeshape,anditisdifficulttomeasurethethicknessoficingaccurately.Tosolvetheproblem,thispaperproposesarotatingcylindricalthree-electrodearrayicingmeasurementmethodbasedonthecapacitanceeffectoficing.Thecylindricalthree-electrodearrayisdrivenbyamotortorotateatlowspeedwhichcanmakeauniformcylindricalicingattachedtoitssurface.Thismethodcangetridofthelimitationsofexistingmethodsandmakethemeasurementmoreaccurate.Firstly,therotatingcylindricalthree-electrodearraystructurewasdesignedbasedonthemeasurementprinciple.Thefeasibilityoftheproposedmethodwasevaluatedwithderivatingthenumericalrelationshipbetweenthecapacitancevalueandthethicknessoficingbasedonangle-preservingtransformationmethod.Thenumberofelectrodeunits,electrodeheight,insulatingringheight,electrodethickness,electrodeouterdiameter,andrelativedielectricconstantwerefoundtoaffectthecapacitancemeasurementperformancebytheformula.Secondly,athree-dimensionalfiniteelementmodelofthecylindricalthree-electrodearraywasestablishedanditsstructuralparameterswerenumericallycalculatedbyfiniteelements.Thesimulationresultsshowthattheincreaseofelectrodecoveragerate,electrodeouterdiameterandthree-electrodearraywillincreasethesignalstrengthandsensitivityofthecylindricalthree-electrodearray.Theelectrodethicknesshaslittleeffectonitsicingcapacitancemeasurementperformance.Finally,optimisedparametersforthedesignofthecylindricalthree-electrodearraywereobtainedwithconsideringsignalstrength(S/Nratio),sensitivityandpenetrationdepth.Anaturalicingtestoftherotatingcylindricalthreeelectrodearrayicingmeasuringdevicewascarriedoutinthefield.Theresultsshowthatwhentheouterdiameterofelectrodesisthesame,thevalueoficingcapacitanceinglazeissignificantlyhigherthanthatinhardrime.Whenthetypeoficingandthethicknessoficingarethesame,thelargertheouterdiameter,thelargerthemeasuredcapacitancevalue.Undertheconditionsofglazeandhardrime,thepenetrationdepthisapproximate12mmandtherotatingcylindricalthree-electrodearraycanmeasurethethicknessoficeanddistinguishthetypeoficingwithinitspenetrationdepth.Themaximumaverageerroroficingcapacitancevalueis4.83%,whichcanfulfillthemeasurementrequirementonthethicknessoficing.Therotatingcylindricalthree-electrodearrayicingmonitoringdevicefulfillstheautomaticacquisitionoficingcapacitancevalueswhichmeetstherequirementsforaccurateonlinemeasurementoficingthickness.Thispaperprovidesanewdeviceandmethodforicingmonitoringoftransmissionanddistributionequipment,anddemonstratesitsfeasibility.Thenextstepwillbetoconductresearchontheengineeringapplicationofthismethod,especiallythepracticalapplicationofoverheadtransmissionlineequivalenticingthicknessmonitoring.
作者：蒋兴良 周文轩 董莉娜 郑华龙 袁一钧 Author：JiangXingliang ZhouWenxuan DongLina ZhengHualong YuanYijun
作者单位：重庆大学雪峰山能源装备安全国家野外科学观测研究站重庆400044国网湖南省电力有限公司电力科学研究院长沙410007
刊名：电工技术学报
Journal：TransactionsofChinaElectrotechnicalSociety
年，卷(期)：2024, 39(5)
分类号：TM85
关键词：冰层电容效应 覆冰在线监测 有限元仿真 旋转圆柱三电极阵列 自然覆冰试验
Keywords：Icecapacitanceeffect onlinemonitoringoficing finiteelementsimulation rotatingcylindricalthree-electrodearray naturalicingtest
机标分类号：TM766TM852TN915.853
在线出版日期：2024年3月19日
基金项目：国家自然科学基金，重庆市技术创新与应用发展专项重点项目基于旋转圆柱三电极阵列的覆冰测量方法[
期刊论文] 电工技术学报--2024, 39(5)蒋兴良 周文轩 董莉娜 郑华龙 袁一钧覆冰严重会影响电网安全稳定运行,输配电装备的覆冰监测是电网冰灾防御的前提.为此,基于冰层的电容效应提出一种旋转圆柱三电极阵列覆冰测量方法.首先,推导电容值与覆冰厚度计算公式,从理论上说明该方法的可行性;其次,建...参考文献和引证文献
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