电力系统广域实时同步相量测量系统研究

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1、华北电力大学（保定）博士学位论文电力系统广域实时同步相量测量系统研究姓名：沙智明申请学位级别：博士专业：电力系统及其自动化指导教师：杨以涵20060501华北电力大学博士学位论文摘要AbstractAspowerindustryentersthenewcentury,wi‘leareainter-connectedpowergridsexpandalot．BuLthereexitpotentialsecurityandstabilizationproblemsinsuchlargesystem．Thewideareasychncronizedphas

2、ormeasurementsystemisapowerfultoolforpowersystemmonitoringandcontrol，whichcangatherthereal-limedynamicinformationofthepower鲥ds．Thisdissertationaddressestwomainissuesforthepowersystem：developmentofanewwidea嘲real-limesychncronizedphasormeasurementsystemandhowtoimprovethereal-time

3、characterofthemeasurementsystem．Anewwideareareal-timesychncronizedphasormeastaementsystemispmposedandimplemented,whichconsistofadispatchsystem,referencemeasurementstation,powerplantandtransfornlersubstationmcasuremaltstation，andreal—timecommunicationsystem．Thenewmeasurementsyst

4、emcouldmeasureallthegeneratorpowerangelsandpotential，thesubstationbusvoltageandcurrentphasorsin20millisecondsandthebreakerslatein10milliseconds．TheconlroldecisionscouldalsobesenttOdestinationiS10milliseconds．Theevolutionattenuatorfactorisintroducedintothe掣me吐calgorithm，whichena

5、blesaBewadaptivegenctcalgorithmtOadjustthepossibilitiesofcrossoverandmutationadaptivelyaccordingtOboththeindividualfimessandevolutiongenerations．Anothernewmeta-heurisdcapproachcalledAdaptiveStochasticPerturbingAntColonySystemisalsopresentod．BothalgorithmsareappHcdt0optimizetheP

6、hamrMeasurementUnits(PMU)placementproblemandfulfilltherequirementofminimizingthenumberofPMUsinthesystemwhilekeepingtheallnodesphasorobservable．AhomotopytrainingmethodfortheWaveletNeuralNetworkm，NN)isusedtoovercomethelowerconvergencyspeedofthegradient-basodorNewtonwoaningmethodo

7、ftheWNN．Thehomotopy-WNNisappliedtothemulti-steppredictionofthereferencephaseangleandgeneratorpowerangelandthepredictionaccuracyfulfilltherequirement．Awideareareal-timecommunicationsystemisalsoconstructedforthemeasurementsystem．Ina1000kmrangeand50nodesprovincialsystem,thecommuni

8、cationsystemcouldtransmit100bytespacketand1000bytespac