1、西南交通大學碩士學位論文風力異步發(fā)電機的無功補償技術研究姓名：黃建濤申請學位級別：碩士專業(yè)：電磁懸浮與超導工程指導教師：郭育華20100501西南交通大學碩士研究生學位論文第1l頁AbstractBecauseitiseasytoconnecttothepowergrid，andalsosimplestructure，lowpriceandhighreliability，asynchronousgeneratorisusedwidely

2、innetworkaswindpowergenerationunitsButwhentheasynchronousgeneratorsgeneratetheactivepower，ithastoabsorbthereactivepowerFormostasynchronousgeneratorwithmediumorlargesize，thereactivepowertheyneedisabout20％to30％ofitsratedpo

3、werIfSOgreatreactivepowerabsorptionisconnectedtopowergridwithoutcompensation，thepowerfactorwillreducesharplyItwillnotonlypollutethepowergridorimpacttheoutputofactivepower，butalsoincreasethelineloss，leadingtotheenduser’Sv

4、oltagedropping，andreducingthestabilityofpowergridCompensationofreactivepowerandincreaseofthepowerfactorarehelpfultoimproveequipmentutilization，transmissionefficiencyandpowerqualityFirstofall，combinedwiththecharacteristic

5、ofthereactivepowerdemandofwindfarm，thearticlehavecomparedtheadvantagesanddisadvantagesofseveralcommonreactivepowercompensationprogramsusedinwindfarm，itshowsthatbyaddingthedynamicreactivepowercompensationdevices(STATCOM)i

6、nthewindinductiongeneratorterminaltocompensatethereactivepowerisadirectandeffectivecompensationprogramItcanincreasewindpowercapacityofelectricfieldlines，andreducetheinternalnetworklossofwindfarmNext，thepaperdiscussesthem

7、aincircuitparameters’designofSTATCOManddesignsthemaincircuitparametersfortheSTATCOMwhosecapacityis350kvarBycomparingthedirectcurrentcontrolandtheindirectcurrentcontrol，itconclud—esthatthesmall—capacitySTATCOMshouldusethe

8、directcurrentcontrolmethod；Analyzingthethreedirectcurrentcontrolstructuresintheorythatis，hysteresiscomparison，sinepulse—widthmodulation(SPWM)，spacevectorpulsewidthmodulation(SVPWM)，itconcludesthatthedirectcurrentcontrolb

9、asedonSVPW—Mmodulationhasafixedswitchingfrequency，highefficiencyinuseofDCvoltageandlessharmonicinthecompensationcurrent；then，itsetstherelatedsimulationplatformtovalidateThesimulationresultsshowthat：usingthedirectcurrentc

10、ontrolbasedonSVPWMmodulation，inthecaseoftheloadchangessuddenlyorcontinuouslySTATCOMcancompensatethereactivepowertheloadrequiredsmoothlyandcontinuouslyLastlythepaperanalyzesthecharacteristicsofreactivepowerabsorbedbythewi

11、ndinductiongeneratorinitsrunningprocess，andtakesthewindinductiongene—ratoroftheJinfengcompanywhosepoweris750kwasanexample，thenitsetssomerelatedsimulationsSimulationresultsshowthat：inthecaseofthewindspeedchangessuddenlyor