继电保护定值仿真及过流保护整定的方法研究和开发

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1、中田电力科学研究院硕士学位论文ABSTRACTProtectionSimulationhasextensiveapplicationinpowersystem，whichisallimportantmoduleofDTS(DispatcherTrainingSimulator)．ItCallbeusedforverificationofProtectionSettingprogramsandresearchonprotectiondevice．Inthispaper,theadvantagesanddisadvantagesofthetwomains

2、imulationmethods‘Logicaljudgement’and‘ValuableJudgement’arecompared，andaModel-PiecingTogethermethodisdevelopedtoimplementtheValuableJudgementTheory。TheModel—PiecingTogethermethodincludesmodelingandcalculationforprotection．Modelingisbasedonanextensiblefunctionlibrary．andtheprote

3、ctionsimulationisimplementedbyuniformfunctionencapsulationandObject-Orientedtechnology．Thismethodisuniversalandemcient，andCanbeappliedforDTSandProtectionSettingVerify，eventheTransientSimulationandDyl珀nlicSimulation．DLL，DirectedGraphSearchand0bject-Orientedtechnologyareusedinthe

4、developmentoftheprograme．Inthispaper，fo砒modelsaremodeledusingtheProtectionModelingProgram,includinghi．hastDistanceProtection,GroundDistanceProtection,ZeroSequenceOvcrcurrentprotectionandCurent-VoltageProtection．ThesefourmodelsaretestedonalIOKVnetwork,theresultdemonstratesthatth

5、emethodiseffectiveandfeasibleandflexibletodowithvariouscharacteristicofprotectionmodel．啦ProtectionModelingMethodissuitableforDTSandProtectionSettingVerification．InverseTimeelementsareapplicatodabroadinenterprisesandpowerplants，butitisdifficulttocoordinateandsettheInverseTimeele

6、ments．Inthispaper,theconceptsofOvercurrentRelayareintroduced，includingInverseTimeRelay，TransformerOverloadCurveandMotor-StartCurve．AndtheOvercurrentCoordinationProgramisdevelopedaccordingtothedemandofthecoordinationofInverseTimeelements．whichcanimplementCoordinationg—Calculatio

7、nandGraphCurveDisplayconveniently．Throughasmallauxiliarypowersystem,theOvercurrentCoordinationProgamisin血'oduced．Keywords：Powersystem；ProtectionSimulation；ProtectionModeling；OvercurrentRelays；InverseTimeⅡ中国电力科学研究院硕士学位论文1．1选墨背景和意义第一章绪论现代电力系统是一个庞大而复杂的系统，随着经济与社会的发展，电力系统的规模越来越庞大，系统

8、的容量和覆盖区域日趋增大，复杂性越来越高，大面积停电事故带来的损失也越来越大。人们在研究反事故措施时发现，电