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1、第29卷第28期中國(guó)電機(jī)工程學(xué)報(bào)Vol.29No.28Oct.5,20092009年10月5日ProceedingsoftheCSEE?2009Chin.Soc.forElec.Eng.115文章編號(hào):0258-8013(2009)28-0115-07中圖分類號(hào):TM755文獻(xiàn)標(biāo)志碼:A學(xué)科分類號(hào):470·40覆冰導(dǎo)線脫冰跳躍特性研究1233陳勇,胡偉,王黎明,侯鐳(1.武漢大學(xué)電氣工程學(xué)院,湖北省武漢市430072;2.國(guó)網(wǎng)電力科學(xué)研究院,湖北省武漢市430074;3.清華大學(xué)深圳研究生院,廣東省深圳市518055)ResearchonIce-sheddingCha
2、racteristicofIcingConductor1233CHENYong,HUWei,WANGLi-ming,HOULei(1.SchoolofElectricalEngineering,WuhanUniversity,Wuhan430072,HubeiProvince,China;2.StateGridElectricPowerResearchInstitute,Wuhan430074,HubeiProvince,China;3.GraduateSchoolatShenzhen,TsinghuaUniversity,Shenzhen518055,Guangdo
3、ngProvince,China)ABSTRACT:Ice-sheddingoccursfrequentlyonoverhead關(guān)鍵詞:覆冰導(dǎo)線;脫冰跳躍;模擬試驗(yàn);仿真計(jì)算transmissionlineinicearea,causingvibrationonthelineand0引言makingitjumpupanddownviolently.Thejumpingoftheconductorsmayreducethephase-to-earthorphase-to-phase覆冰導(dǎo)線在氣溫升高、自然風(fēng)力作用或人為振clearance,fromwhichflasho
4、vercanhappenundersevere動(dòng)敲擊之下會(huì)產(chǎn)生不均勻脫冰或不同期脫冰[1-2]。脫conditions;Ontheotherhand,itislikelytoapplyhigh冰不但影響導(dǎo)線以后的再覆冰過(guò)程,且由于瞬時(shí)拉dynamicstressesontheinsulatorstrings,fittingsandtowers,力的驟變,還會(huì)對(duì)線路產(chǎn)生危害很大的機(jī)械或電氣andcausedamagetothem.Inheavyicingareasandlong-span[3-7]事故。cases,theeffectsofice-sheddingaree
5、speciallysignificant.In[8-13]與導(dǎo)線覆冰或舞動(dòng)等問(wèn)題的研究相比,目thispaper,asimulationexperimentwascarriedouttoacquire[14-16]前國(guó)內(nèi)外對(duì)導(dǎo)線脫冰問(wèn)題的研究要少得多。目theactualdynamicresponsesofthelinedisplacementandtension,inwhichthenaturalicecoveredlinewassimulatedby前對(duì)輸電線路導(dǎo)線脫冰跳躍問(wèn)題的研究主要采用lumpedloadshangingontheline,andvariou
6、sspan試驗(yàn)和數(shù)值模擬的方法。加拿大的Jamaledding等configurationsaswellasice-sheddingmodeweretakeninto人[17]在實(shí)驗(yàn)室利用人工氣候室對(duì)3.22m長(zhǎng)導(dǎo)線進(jìn)consideration.Furthermore,numericalcomputationisdone行了靜荷載的脫冰模擬試驗(yàn),對(duì)多種脫冰情形進(jìn)行accordingtothetestconditions.Goodagreementbetweenthe了模擬,但從較小的比例模型上獲得的試驗(yàn)結(jié)果并computationalandtestresultsiso
7、btainedwhichprovesthe不能推廣應(yīng)用到實(shí)際線路上。隨著計(jì)算機(jī)技術(shù)的發(fā)validityofboththetestandnumericalmethods.展,目前主要采用非線性動(dòng)力有限元方法來(lái)模擬塔KEYWORDS:icingconductor;iceshedding;simulation線耦合體系在線路脫冰作用下的振動(dòng)[18-22]。然而,experiment;numericalcomputation由于實(shí)際線路參數(shù)的復(fù)雜性,如導(dǎo)線機(jī)械參數(shù)、檔摘要:導(dǎo)線脫冰是冰區(qū)輸電線路中的常見(jiàn)現(xiàn)象,導(dǎo)線脫冰會(huì)距組合、高差、絕緣子串長(zhǎng)、導(dǎo)線的動(dòng)力阻尼