同相供电变电所继电保护方案研究

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1、西南交通大学硕士学位论文同相供电变电所继电保护方案研究姓名：何兴隆申请学位级别：硕士专业：电力系统及其自动化指导教师：李群淇20090401西南交通大学硕士研究生学位论文第1l页AbstractTheCo-phaseTractionPowerSupplySystem(CTPSS)appliesasymmetrycompensatetechniquewithacoreofnegativesequenceandreactivepowercompensationintractionsubstations．Atthesametime，itadoptstheIn

2、tegratedPowerFlowController(IPFC)tOremovesystemunbalance，filterharmonicsandcompensatereactivecurrent．theAsymmetricsingle-phaseloadsystemwithnegativesequence，harmonicsandlowpowerfactorwhichcanberegardedasapureresistiveleakagethree-phasesymmetricalload．Theco-phasepowersupplysubsta

3、tionisconstructedwiththeimportantdevicesincludingtractiontransformerandIPFCetc．OnlytheseCOredevicesrunnormallyatallthetime，theCTPSSCanrunsafelyandstably．ThecriticalpointtOsetCTPSSsubstationunderprotectionliesintractiontransformerandIPFC．Thisthesis’transformerrelayprotectioninclu

4、desgasprotection，overcurrentprotection，overvoltageprotection，groundprotection．alsodifferentialprotectionwithavarietyofstrategys．Differentialprotectionisthemainrelayprotectionoftransformer,anditisimportanttOrecogniteinrushcurrentandintemalfaultcurrent．Nowtherearelotsofwaystorecog

5、niteinrushcurrent，suchasCurrentWaveformCharacteristicsRecognition，FluxCharacteristicsRecognition,EquivalentCircuitParametersDifferentialDiagnosis，DifferenceActivePowerMethod．Andaccordingtovariousmethodtoinstalldifferentialprotection．IPFCrelaysprotectionisanotherimportantparttoCT

6、PSSsubstationrelaysprotections．Thepaperadoptmanywaystosetupovercurrentprotection，overvoltageprotection，overheatprotectionforIPFCbyAnalysisingIPFCanditsisolationtransformer’Sabnormalityandfaultstates；then，tOcompensategenerallyIPFCunderthesituationthatthedevicesarefreefromdamage．西

7、南交通大学硕士研究生学位论文第1II页Atlast，thispaperproposesWideAreaProtectionSystem(WAPS)．WideAreaprotectionmethodistorelayprotectandautocontrolCTPSS’overallstabili吼ItmainlyinstallsPhasorMeasurementUnitff'MU)whichbasedonGPSClockSynchronizationTechnologytocollectandfeedbackmeasurementpots’Inform

8、ationinallthesubstationsintheprotectionarea．Wit