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1、重庆大学硕士学位论文II英文摘要ABSTRACTTheicingconditionoftransmissionlinesposesathreattothesecurityandstabilityofoperationofpowergrids.Thedomesticandforeignscholarshavedonealotofresearchworkontransmissionlinesicecoveranditsdefensetechnology.But,howtocarryouteffectiveanti-icerenovationworkoftransmi
2、ssionlinesinthecaseofcostcontrol,howtosolvetheblindnessoficeonlinemonitoringequipmentinstallationandhowtodeterminetheicedisasterearlywarningthresholdoftransmissionlinesstillneedtobeaddressed.Inthispaper,theoverheadtransmissionlinesasobjectofstudy,aimingtoresearchakindoficeresistancee
3、valuationmethodwhichcanlocatetheweaklinkoflinesandcalculatetheultimatebearingcapacityoftransmissionlinetower-linesystem.Atthesametime,asthebasisoficedisasterwarning,developedafastandexactartificialadjuvantmethodformeasuringthelineicethickness,whichisinordertosolvetheexistingicedisast
4、erdefenserelateddeficienciesinourwork.Inthispaper,themainworksareasfollows:①Developedarapidmodelingsystemforfiniteelementmodeloftransmissiontowers-linesystem.Establishedfiniteelementmodellibraryoftowers,wires,groundwiresandcablesinChinatypicaliceregion500kvtransmissiontowers,andcombi
5、ningwithparametricdesignmethoddevelopedaaccurateandfastmodelingsystemforthefiniteelementmodeloftransmissiontower-linesystem,whichcanprovidesthesupportforiceabilityevaluationofthewholeline.②proposediceresistancecapabilityevaluationmethodofthetransmissiontower-linesystemBasedonthemetho
6、doffiniteelementsimulationanalysis,consideringgeometricnonlinearcharacteristicsofconductorsandgroundwires,andmicrotopographyandmeteorologicalfactors,researchedtheiceabilityevaluationmethodoftransmissiontower-linesystem,andgotaiceabilityevaluationmethod,whichcombinedwithfiniteelementm
7、odelfortransmissiontower-linesystemrapidmodelingsystemcanberelativelyefficientimplementationoftransmissionlinesiceabilityassessmentofthewholeline,forlocatingthetower-lineweaklinksandcalculatingtheultimatebearingcapacityoftransmissiontower-linesystem.③Putforwardanewkindoftransmissionl
8、inesicedisas
