電力線路冰厚測量及融冰方法研究

1、長沙理工大學碩士學位論文電力線路冰厚測量及融冰方法研究姓名：伍智華申請學位級別：碩士專業(yè)：電力系統(tǒng)及其自動化指導教師：曾祥君20100401ABSTRACTWiththedevelopmentofelectricpowerindustryandincreasinglycomplicatedstructureofpowergrid，itisimportanttomaintainsafeoperationofelectricpowerfor

2、socialstabilityandeconomicdevelopmentIcingofelectrictransmissionlinesisoneofseriousnaturaldisasterswhichwouldcausesubstantialdamagetopowersystemandthusbringinstabilityandunsafetyTherefore，thedeicingmethodofadjustingopera

3、tionmodeandchangingpowerflowdistributionisresearchedinthisthesisFirstly，thetraditionalcalculationoficingparametersisintroducedAnovelmethodoficethicknessmeasurementfortransmissionlinesbasedontravelingwavetransmissiontimed

4、ifferenceispresentedFormulasoficethicknesscalculationaretheoreticallyderived，ThearrivingintervalsofthetravelingwaveisrecordedbyGPSlocationsystemResultsarecomparedwithfieldmeasureddatainsomecertainpowergridandshowthatthis

5、methodissuitabletocalculatetheaverageicethicknessoftransmissionlineBasedontheheatequilibriumoftheconductor’Sicingprocess，thethermalbalanceequationisestablishedandtheformulasofcalculatingtheminimumcurrentandtimeofde—icing

6、arederivedTheoreticalsimulationandengineeringpracticeresultshaveshownthatthedeicingtimedecreaseswithanincreaseofcurrentThede—icingmethodofconductorsisstudiedwhenoperationmodeandpowerflowdistributionarechangedTheoperation

7、modeischangedusingopen—loopstrategyaccordingtotheloopnetworksandthemathematicaloptimizationmodelisestablishedtoanalyseeachschemeThesimulationisconductedforWSCC9andEPRI36nodessystemandresultsshowthatthedeicingmethodistheo