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时间:2020-06-05
《特高压同塔多回输电线路脱冰跳跃动力响应分析.pdf》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、第36卷第9期电网技术V_01.36No.92012年9月PowerSystemTechnologySep.2012文章编号:1000.3673(2012)09—0061.07中图分类号:TM734文献标志码:A学科代码:470·4054超/特高压同塔多回输电线路脱冰跳跃动力响应分析韩军科,杨靖波,杨风利,李清华,李振宝2(1.中国电力科学研究院,北京市海淀区100192;2.工程抗震与结构诊治北京市重点实验室(北京工业大学),北京市朝阳区100124)AnalysisonDynamicResponsesofIceShedding--CausedDrastic
2、ConductorVibrationOccurredinEHV/UHVMulti.CircuitTransmissionLinesonSameTowerHANJunke,YANGJingbo,YANGFengli,LIQinghua,LIZhenbao(1.ChinaElectricPowerResearchInstitute,HaidianDistrict,Beijing100192,China;2.BeijingKeyLabofEarthquakeEngineeringandStructuralRetrofit(Be0ingUniversityofTech
3、nology),ChaoyangDistrict,Beijing100124,China)ABSTRACT:Tomakethedynamiccharacteristicsofshouldbetakenas2O%:andforoverheadgroundwiretheice.coveredEHⅥUHVmulti.circuittransmissionlinesonthepercentageshouldbetakenas100%.sametowerclear,thedynamicresponseoficeshedding-causedKEYWORDS:EHV/UH
4、Vmulti.circuittransmissionlinesdrasticconductorvibrationwasanalyzedbyfiniteelementonthesametower;tower-linesystem;iceshedding-causedmethod(FEM).Correspondingly,considertingtheinfluenceofdrasticconductorvibration;unbalancedtensiongeometricalnonlinearityandtakingthedoublecircuit1000kV
5、transmissiODlineanddoublecircuit500kVtransmissionline摘要:为了明确超/特高压同塔多回输电线路的覆冰动态特onthesametoweraswellassinglecircuit~800kVDC性,采用有限元方法分析了其脱冰跳跃动态响应。考虑几何transmissionlineanddoublecircuit500kVtransmissionline非线性的影响,采用有限元理论建立了导/地线一绝缘子及铁onthesametowerforexamples,refinednumericalanalysis塔一导/地
6、线一绝缘子体系的脱冰跳跃精细化数值分析模型。modelsoficeshedding-causedvibrationforconductor以1000kV交流双回、500kV交流双回同塔多回输电线路(overheadgroundwire)-insulatorsystemandtower-conductor~~800kV直流单回、500kV交流双回同塔多回输电线路为(overheadgroundwire)-insulatorsystemwerebuiltbyFEM,in例,考虑塔线耦合效应、脱冰位置、档距和高差等影响因素,whichthefactorssuchas
7、couplingefectoftowerwithlines,完成了不同工况下系统的脱冰跳跃分析。结果表明:当铁塔thepositionofice-shedding,spanandheightdiffferenceswere较高时,塔线耦合作用对导线脱冰跳跃纵向不平衡张力的影takingintoaccount,andtheanalysisonthesystemsunder响不大,对地线脱冰跳跃纵向不平衡张力的影响较大;边档variousoperatingconditionswerecompleted.Analysisresults脱冰产生的纵向不平衡张力明显大于
8、中档脱冰。最后,对showedthat
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