模糊控制與神經網絡在電壓穩(wěn)定性問題中的應用研究.pdf

1、江蘇大學碩士學位論文模糊控制與神經網絡在電壓穩(wěn)定性問題中的應用研究姓名：吳侗申請學位級別：碩士專業(yè)：系統(tǒng)工程指導教師：李醫(yī)民20061215江蘇大學碩士學位論文ABSTRACTThepowersystemisallessentiallynonlineardynamicsystem；itsstabilityhasbeenamajorresearchtopicVoltagestabilityisanimportantresearchaspe

2、ctinthestabilityofthepowersystemVoltagequalityisoneofthekeyindicatorstomeasurepowerqualityToensurethesystem’Seconomyandreducethelossofthepowersystem，mostofthepowercompaniesinstalltheonloadtapchanger(OLTC)transformerandpa

3、rallelcompensationcapacitorbanksinthesubstationByadjnstingtransformertaprunningpositionandparallelcompensationcapacitorswitching，itcallensurethesystem’svoltagestabilityandeconomicoperationatthesametimeInthepowersystemthe

4、rearethreeprimaryfactorsaffectedthevoltage’SstabilitythatistheparallelcapacitorscompensationOLTCandtheloadinherentnonlinearcharacteristicsrespectivelyThisthesispresentedafuzzycontrolmethodbasedonthecombinationcontrolofth

5、ecompensatorcapacitorbanksandtheOLTCmaintransformerfurnishedinlarge—scaleelectricsubstationByestablishingthemodelwithreactivepowerandvoltageparametersbasedonthecombinationcontrolofthecompensatorcapacitorbanksandtheOLTCma

6、intransformerfurnishedinlargescaleelectricsubstationtestedthefuzzycontrolsystem，Inthecontrolsystem，thechangeofvoltageandpowerfactorwerefuzzifiedastheinputvariableandtheOLTCandthecapacitorbankswerecontrolledbytheoutputsig

7、nalwhichWascalculatedafterfuzzyinferenceanddefuzzilyingTheresultprovesitsstabilityandvaliditybysimulationwhichcombinedwiththerealizedsubstationparametersByanalysisallfactorsthatimpactvoltagestabilitytheOLTCnegativeeffect

8、sandtheloadcharacteristicsaretwomajorreasonsThispaperdesignstheOLTCnegativeeffectsearlywarningsystemandtheloadcharacteristics’earlywarningsystemusingartificialneuralnetworktoolseparatelyInthedesignoftheartificialneuralne