特高压输电线路导线脱冰跳跃动态特性

ISSN10000054CN112223/N()JTsinghuaUniv(Sci&Tech),201050102010,Vol.50,No.104/2916311636特高压输电线路导线脱冰跳跃动态特性孟晓波1,2,王黎明1,侯镭3,傅观君1,2,孙保强1,2(1.,518055;2.,100084;3.,100140):20090818::(1986),(),,:,,Email:[e-mail]:覆冰导线脱冰会引起导线的剧烈运动,使导线跳跃上下摆动,对输电线路造成危害很大的机械和电气事故建立了3自由度多档导线模型分析特高压输电线路脱冰跳跃问题,研究了覆冰厚度脱冰量档距大小耐张段中档数导线悬挂点高差不均匀脱冰等因素对导线脱冰跳跃的影响,对特高压输电线路导线排列铁塔选型档距配置的设计有一定的参考价值通过大量的计算,静态纵向不平衡张力换算为动态纵向不平衡张力的冲击因数可取为18,留有了一定的裕度,能够满足工程实际的需要:特高压;架空输电线路;脱冰跳跃;数值计算;纵向不平衡张力:TM726:A:10000054(2010)10163106DynamiccharacteristicsoficesheddingonUHVoverheadtransmissionlinesMENGXiaobo1,2,WANGLiming1,HOULei3,FUGuanjun1,2,SUNBaoqiang1,2(1.GraduateSchoolatShenzhen,TsinghuaUniversity,Shenzhen518055,China;2.DepartmentofElectricalEngineering,TsinghuaUniversity,Beijing100084,China;3.ACProjectConstructionBranch,StateGridCooperationofChina,Beijing100140,China)Abstract:Icesheddingcancauseviolentoscillationofthelines,andmaketheconductorsjumpupanddown.Thedynamiceffectoficesheddingontransmissionlinesimpliestwocategoriesofelectricalandmechanicalconcerns.A3DOF(degreeoffreedom)dynamicmodelformultispanlineswasdevelopedtocalculatedynamiceffectsoficesheddingonultrahighvoltage(UHV)overheadtransmissionlines.Theinfluencingfactorswerestudiedincludingtheicethickness,percentageoficeshedding,spanlength,numberofspansperlinesection,differentelevationbetweensuspensionpoints,andnonuniformmodeiceshedding.Considerationoftheicesheddingproblemsisveryimportantindeterminingthealignmentoftheconductors,thetypeoftowersandtheconfigurationsofspansinUHVoverheadtransmissionlines.Theimpactfactorofstaticlongitudinalimbalancetensionchangingtodynamiclongitudinalimbalancetensioncanbeconfirmedas1.8throughthemassivecomputations,whichmeetsthedemandofprojects.Keywords:ultrahighvoltage(UHV);overheadtransmissionline;iceshedding;numericalcomputation;longitudinalimbalancetension,,,,,;,,,,[1],[23]2,,Jamaledding[4]3.22m,,,[58]RoshanFekr[7]1998ADINA,,1632()2010,50(10),3,,,1导线动力学计算模型1.1,,,[910],y=TqcoshqT(x-x0)+y0.(1):q,T,x0y0,:0=T/A,g=q/A(A),y=0gcoshg0(x-x0)+y0.(2)1.2,,[910]s-EL-=L+g2L3242-EL-L=s0,(3)-EL2g2242+E=C.(4)AB:A-EL2g2A242A+EA=B-EL2g2B242B+EB.(5):E,MPa;,;L,m:,,(5)1.3[11]MX+CX+KX=P.(6):XXXP,t,MCK,:X(t)=X(t+t)-X(t-t)2t,(7)X(t)=X(t+t)+X(t-t)-2X(t)t2.(8),[12]ttcr=2/n.(9)n1.43,1,2,3(x,y,z),,,,,,:,;,13[1],:16332,,,,,,(9)tT,22各种影响因素对特高压输电线路导线脱冰跳跃的影响,,,,,,,N=500,,0.1Nsm-22.18LGJ630/45,5,500m,15mm,50%,,51015202530mm,,2008,,1,()1/mm/m/N/N53.182284161.824106.065038811.751158.4983413841.6592010.49123220141.6352512.15170827741.6243013.60227436761.616,,,,,(50%),,,,1,1.8,,2.215mm,,,25%,50%,75%,100%,2.121634()2010,50(10)2/%/m/kN/kN254.040.4500.7891.753508.490.8341.3841.6597513.201.1431.7671.53710017.871.3662.0211.480,,,,,,,,2.315mm,50%,,500~1500m,2.133/m/m/kN/kN5008.490.8341.3841.65960010.991.3772.2891.66270012.882.0093.5331.75980014.082.6454.8501.83490014.713.2605.9781.834100014.973.8087.1611.881110014.994.2908.0381.874120014.704.7098.9171.894130014.085.0759.7601.923140013.695.39610.3641.921150013.235.68110.9501.9273,,;,,;,,,,,,,,,,,,3,,,,2.4,,500m,50%(),8LGJ630/45,15mm457,,,4/m/N/kN37.837561.2581.66458.498341.3841.65978.728581.4251.66198.808651.4401.665,,,,,,,,,,,,,,,,2.515mm,50%,,,335,:163510%20%30%40%50%,2.1,55/%/m/N/kN08.498341.3841.659108.478431.4131.702208.448581.4441.683308.398791.4841.688408.329061.5451.705508.269371.6351.7455,,,,;,,,,,,,30%,,-30%,,44,,8.05m,23,2.682kN,,,,,2.6,500m,8LGJ630/45,15mm,50%(0.5,),,6,6/m/kN/kN0~0.57.690.8311.2601.5160.05~0.559.190.9321.4141.5170.1~0.610.221.0111.5611.5440.15~0.6511.611.0641.7071.6040.2~0.712.711.0911.7781.6300.25~0.7513.081.0931.7881.636,,,,,,,,,,,,,,,3结论,,:1),2),3),,,1636()2010,50(10)4),5)6),,,7),1.8,,1.8()1.8,(References)[1],,,.[J].,2008,28(6):16.HOULei,WANGLiming,ZHUPuxuan,etal.DynamicbehaviorcomputationoficesheddingofUHVoverheadtransmissionlines[J].ProceedingsoftheCSEE,2008,28(6):16.(inChinese)[2]McComberP,DruesJ.Effectofcabletwistingonatmosphericiceshedding[C]//Proceedingsof5thInternationalWorkshoponAtmosphericIcingofStructures(IWAIS),Japan.1990.[3],.220kV[J].,1993,19(1):5457.HUANGShaopei,YUBoping.Acomprehensiveanalysisabouttheobservationoffreezingphenomenaon220kVtransmissionlineinheavyfrostzone[J].HighVoltageEngineering,1993,19(1):5457.(inChinese)[4]JamaleddingA.Weighdroppingsimulationoficesheddingeffectsonanoverheadtransmissionlinemodel[C]//Proceedingsof7thInternationalWorkshoponAtmosphericIcingofStructures(IWAIS),Canada.1996.[5]JamaleddingA.SimulationoficesheddingonelectricaltransmissionlineusingADINA[J].Computers&Structures,1993,47(45):523536.[6]KalmanT,FarzanehM,McClureG.Numericalanalysisofthedynamiceffectsofshockloadinducedicesheddingonoverheadgroundwires[J].Computers&Structures,2007,85(78):375384.[7]RoshanFekrM,McClureG.Numericalmodellingofthedynamicresponseoficesheddingonelectricaltransmissionlines[J].AtmosphericResearch,1998,46(12):111.[8]BarbieriR,BarbieriN,DeSouzaOH,Jr.Dynamicalanalysisoftransmissionlinecables.Part3:Nonlineartheory[J].MechanicalSystemsandSignalProcessing,2008,22(4):9921007.[9].[M].:,1991.[10].[M].:,2003.[11],.[M