文档摘要：输电线路冰灾长期威胁电网安全稳定运行,结合输电线路实际覆冰情况,建立准确的输电线路覆冰增长模型对电网冰灾防御具有重要意义.但现有的输电线路覆冰增长模型多忽略了输电线路自由扭转覆冰过程.该文基于野外自然环境下输电线路单导线自由扭转覆冰的观测结果,建立了反映导线自由扭转覆冰动态过程的仿真分析模型.在重庆大学雪峰山能源装备安全国家野外科学观测研究站开展GJ50导线自由扭转覆冰实验,将实验结果与数值仿真结果进行对比分析.结果表明:导线扭转角度和单位覆冰质量沿单导线中心点对称分布;仿真获得的导线覆冰形状与实际情况吻合;导线扭转角度和单位覆冰质量仿真值与测量值误差平均值均在10％以内.
Abstract：Powergridsecurityhasbeenthreatenedbytransmissionlineicedisasterforalongtime.Consideringtheactualicingprocessoftransmissionline,itisofgreatsignificancetoestablishanaccurateicingmodelforpowergridicedisasterprevention.However,theprocessoffreetorsionalicingontransmissionlineshasnotyetbeenwelltakenintoaccount.Basedontheobservationresultsoffreetorsionalicingonsingleconductorsinnaturalenvironment,amathematicalsimulationforthedynamicprocessoffreetorsionalicingonsingleconductorsisestablishedinthispaper.AnaturalsiteexperimentoffreetorsionalicingofGJ50wirewascarriedoutinXuefengMountainEnergyEquipmentSafetyNationalObservationandResearchStationofChongqingUniversity,andtheexperimentalresultswerecomparedwiththesimulationresults.Thefindingsofthispaperareasfollows:(1)ThesingleconductorfreetorsionalicingphenomenonwasobservedattheXuefengMountainNationalObservationandResearchStationandthesingleconductorfreetorsionalicingprocesswasanalysed.Singleconductorfreetwistingicingtotheformationofwing-shapediceonthesurfaceoftheconductorasastartingpoint,withthemaintenanceoftheiceenvironmentortheincreaseinthestrengthoftheicecover,repeatedlythroughtheicetorsiontorquelessthantheconductorcounter-torsiontorqueholdingprocessandicetorsiontorquegreaterthantheconductorcounter-torsiontorqueicedrivenbytheconductorfreetwistingprocess,graduallyformingroundice.(2)Basedonthedynamicequilibriumprocessoficetorsionalmomentandcounter-torsionalmomentduringthefreetwistingofasingleconductoroverice,asimulationmodeloffreetwistingofasingleconductorovericeisestablishedbasedontheprinciplesofhydrodynamicsandmechanicalequilibrium.Firstly,theiceshapeandmassofthewireiscalculatedwhenthewireisnottwisted,andthenthemomentbalanceequationissolvedtoobtaintheangleoffreetwistingofthewirearounditscentralatthismassandtocorrecttheiceshape.Thisprocessisrepeatedtoachieveadynamicsimulationofasingleconductorfreetotwist.(3)TheGJ50conductorfreetorsionalicingfieldexperimentsandnumericalsimulationswerecarriedout,andtheexperimentalresultswerecomparedwiththesimulationresults.Theresultsshowthatunderdifferenticeperiods,thesimulationandexperimentalvaluesoftorsionangleanduniticequalityerrorarewithin10％oftheaveragevalue,thesimulationofthewireiceshapeandtheactualshapeoftheicecovermatch.(4)Simulationandexperimentalresultsshowthatwhenasingleconductorisfreetotwisttheice,theangleoftwistandtheuniticemassaresymmetricallydistributedalongthecentreoftheconductor.Duringthesameiceperiod,theclosertothecentreoftheconductor,thegreaterthetorsionangleanduniticemassoftheconductor,andtheclosertheiceshapeistoacircle.Theresearchresultsofthispaperwillprovideareferencefortransmissionlineice-coversimulationanalysisandice-coverreversalresearch.
作者：杨国林 蒋兴良 廖乙 胡建林 张志劲Author：YangGuolin JiangXingliang LiaoYi HuJianlin ZhangZhijin
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
刊名：电工技术学报 ISTICEIPKU
Journal：TransactionsofChinaElectrotechnicalSociety
年，卷(期)：2024, 39(13)
分类号：TM85
关键词：单导线 扭转覆冰 数值仿真 野外实验验证
Keywords：Singleconductors freetorsionalicing numericalsimulation fieldexperimentvalidation
机标分类号：TM712TP391.9TH137
在线出版日期：2024年7月22日
基金项目：国家自然科学基金输电线路单导线自由扭转覆冰动态仿真研究[
期刊论文] 电工技术学报--2024, 39(13)杨国林 蒋兴良 廖乙 胡建林 张志劲输电线路冰灾长期威胁电网安全稳定运行,结合输电线路实际覆冰情况,建立准确的输电线路覆冰增长模型对电网冰灾防御具有重要意义.但现有的输电线路覆冰增长模型多忽略了输电线路自由扭转覆冰过程.该文基于野外自然环境下...参考文献和引证文献
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关键词：单导线,扭转覆冰,数值仿真,野外实验验证,
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