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1、第35卷第9期高電壓技術(shù)Vol.35No.92009年9月30日HighVoltageEngineeringSep.30,2009·2313·輸電導(dǎo)線的覆冰模擬系統(tǒng)1,21112汪佛池,杜岳凡,李成榕,呂玉珍,趙宇倩(1.華北電力大學(xué)高電壓與電磁兼容北京市重點實驗室,北京102206;2.華北電力大學(xué)電力系,保定071003)摘要:為了更好地開展輸電導(dǎo)線覆冰及防冰研究工作,需研制輸電導(dǎo)線覆冰模擬系統(tǒng),故在分析了輸電導(dǎo)線常見雨淞覆冰氣候條件基礎(chǔ)上優(yōu)化設(shè)計了導(dǎo)線成冰小室、噴水裝置及導(dǎo)線旋轉(zhuǎn)系統(tǒng)等。利用Fluent流體仿真軟件分析成冰小室中氣流分布的情況表明,該成冰小室內(nèi)部氣流分布基本均勻
2、,可有效模擬導(dǎo)線覆冰過程中周圍氣流場分布。實測成冰小室內(nèi)部風(fēng)速與仿真結(jié)果相符且噴水裝置產(chǎn)生的水滴直徑達到了自然界中毛毛雨的雨滴直徑。對鋼芯鋁絞線覆冰實驗顯示,導(dǎo)線表面短時內(nèi)即可形成均勻致密的雨淞層,說明該覆冰模擬系統(tǒng)可以有效模擬自然界中導(dǎo)線表面雨淞覆冰的形成過程。關(guān)鍵詞:輸電導(dǎo)線;覆冰;模擬系統(tǒng);氣流;水滴直徑;雨淞中圖分類號:TM75文獻標(biāo)志碼:A文章編號:100326520(2009)0922313204IcingSimulationSystemforTransmissionLine1,21112WANGFo2chi,DUYue2fan,LICheng2rong,LBYu2zhe
3、n,ZHAOYu2qian(1.BeijingKeyLaboratoryofHighVoltage&EMC,NorthChinaElectricPowerUniversity,Beijing102206,China;2.DepartmentofElectricalEngineering,NorthChinaElectricPowerUniversity,Baoding071003,China)Abstract:Iceaccumulationontransmissionlinecouldcausemanyseriousaccidentssuchasshortcircuitfault,d
4、is2connectionfaultandpolefailure,etc.Somesolutionsareneededtoreduceoreliminateiceaccumulationontransmis2sionlines.Inordertostudythetransmissionlinesicingprocessanditsanti2icingmethod,anicingsimulationsys2tem,includingawindtunnel,water2sprayingsystemandconductorrotationsystem,wasdesigned.Accordi
5、ngtothesimulationresultsbasedontheFluentsoftware,theaircurrentwasuniformlydistributedinthewindtunnel,whichcouldperfectlysimulatetheaircurrentaroundtransmissionlinesinfreezingweather.Thewaterdropletsweregeneratedbythespraynozzleandthesizesweremeasuredbyasplashmethod.Thetestresultsshowthatthesize
6、ofthewaterdropletisclosetothedrizzleonewhichisthemainsourceofglazeicingonthetransmissionlines.Thetransmissionlinecanbecoveredwithauniformcompacticelayerwiththehelpofarotatingmachine,whichcansimulatetheicingprocessoftransmissionlineinavariedwind.Theicingexperimentsofaluminumcablessteelrein2force
7、dindicatethattheconductorscanbecoveredwithauniformcompactglazeicelayeronlyafterbeingsprayedfor20min.Therefore,theicingsimulationsystemcanperfectlysimulatetheglazeicingprocessoftransmissionlines.Keywords:transmissionline;icing;simu
