1、哈爾濱工業(yè)大學碩士學位論文SVG的模糊PID控制系統(tǒng)的研究姓名：劉勁松申請學位級別：碩士專業(yè)：電力系統(tǒng)及其自動化指導教師：劉瑞葉20050601AbstractFlexibleACtransmissionsystem(FACTS)devicescanincreaseflexibilityandcontrollabilityofpowersystemoperationandenhancethestabilityofpowersystemA

2、satypicalFACTSdevice，StaticVarGenerator(SVG)isoneofthemosteffectivereactivepowercompensationdevicestoimprovepowertransfercapabilityandvoltagestabilitySoitcanbeusedtodampsystemoscillationsandregulatevoltagelevel，whichmake

3、sitanewandusefulequipmentRecentlySVGisusuallycontrolledbytraditionalPIDcontrolstrategyThetransientresponsetimeistoolongandovershootingistoobigwhensomedisturbancesappearsThefuzzyPIDcontrolisfreeoftheprecisemathematicmodel

4、softheobjectundercontrolandnonlinearfactsItsregulationofparametershasroughrobustSo，anewtypeofSVGcontrolstrategywasproposedinthispaperwhichcontrolledcurrentdirectlytoregulatethevoltageofconnectionpointFirstlytheadvantages

5、ofSVGasoneofreactivepowercompensationdeviceswerediscussedinthispaperDisadvantagesandadvantagesbetweenvoltage—sourceSVGandcurrentsourceSVGwerecomparedTheworkingprinciplesandworkingmodesofSVGwerestudied，then，adynamicmathem

6、aticmodelofvoltagesourceSVGwasbuiltBasedonthismodel，themaincircuitandparametersweredesignedwiththeinstantaneousreactivepowertheorySecondly，aPIDcontrollerofSVGwasdesignedInordertoreachevenbetterdynamicperformance，theinsid

7、eloopofcontrollerwascontrolledbyDCcapacityvoltageandtheoutsideloopofcontrollerwasdirectlycontrolledbythecurrentThePWMtechniquewasusedduringthisProcessThirdlyafuzzyPIDcontrollerofSVGwasdesignedThefuzzyPIDcontrolstrategyco

8、uldcontroltheparameterseffectivelyItscontrolprocesswassimilartOthehumankind’STheoutputofthecontrollerwouldchangewiththechangeofthestateofsystemConsequently，thecontrollercanenhancethesystem’SstabilityandvoltagelevelFinall