电压暂降检测及其补偿方法的研究

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1、ABSTRACTTheimprovementofpowerqualityinpowersystemhasattractedmoreandn'loreattentionsofpeopleinthefieldofscholar,powerapartmentsandusersbothdomesticandabroad．Voltagesagshasbeenthemostseriousprobleminpowerquality．So，theexactdetectionofthecharacteristicsofvoltagesagsandfastvoltagecompen

2、sationcanbringtremendouseconomicbenefit．Itisimportanttoresearchthesubjectaboutvoltagesags．Inthispaper，firstly,methodsofdistinguishinginterruptioncoLll"Seresultedinvoltagesagsaregivencompendiously．Thefollowingcontentisthecoreofthispaper--studyingOilthedetectionmethodsofvoltagesags．Abo

3、veall，thepaperanalyzedthemeritsanddefaultsofallkindsofpresentmethodstodetectvoltagesags，andcomparedonewithanother．Then，atthebasisofnewestdetectionmethodnamed筇transformationmethodapplied011singlephase，thispaperproposesallimproveddetectionmethodofvoltagesagscharacteristicswhichusesdiff

4、erentialcoefficientinsteadofphasedelaythatisemployedin础transformmethodforthevoltagesagsdetection．TheimprovedmethodachievesfastandaccuratedetectionofvoltagesagscharacteristiCS,whichnotonlyacceleratesthedetectionspeed，butalsoovercomesshort-timedisturbanceappearinginthedetectionwaveform

5、causedbyphasedelayin础transformmethod．So，theimprovedmethodpresentedinthispapereRhancesthedetectionaccuracyandspeedwhichisveryusefulforthefollowingcompensationdevice(DVR)．ThesimulationresultsverifythevalidityofthemethodproposedforDVR．Inthispaper,themostseriouspowerqualityproblem·-volta

6、gesags—isintroducedcomprehensively，formitsconception，coursesandresultstodistinguishingitsinterruptioncourses，detectingitscharacteristics，studyingonitscompensationmethodsandintroducingthestructuresofitscompensationequipment．Itcanprovidetheprofoundbasisfor也efutureresearchonthissubjectK

7、EYWORDS：powerquality，voltagesags，叩transformation，compensationmethod，dynamicvoltagesags，pulsewidthmodulation独创性声明本人声明所呈交的学位论文是本人在导师指导下进行的研究工作和取得的研究成果，除了文中特别加以标注和致谢之处外，论文中不包含其他人已经发表或撰写过的研究成果，也不包含为获得墨凄盘茎或其他教育机构的学位或证书而使用过的材料。与我一同工作的同志对本研究所做的任何贡献均已在论文中作了明确的说明并表示了谢意。学位论文作者签名：齑玉器签字日期：州年2月礴日

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