基于電壓空間矢量的恒頻滯環(huán)UPQC控制策略研究.pdf

1、天津大學(xué)碩士學(xué)位論文基于電壓空間矢量的恒頻滯環(huán)UPQC控制策略研究姓名：李樹(shù)超申請(qǐng)學(xué)位級(jí)別：碩士專業(yè)：電氣工程指導(dǎo)教師：萬(wàn)健如201112ABSTRACTPoweristhemainenergyofmodernsociety，whichiswidelyusedinallwalksoflifeAndthenationaleconomyrelatestothequalityofpowerdirectlyWi也也eincrementofnon

2、—linearcomponentsofloadthegridstructureismoreandmorecomplex，andthesituationthatvariousproblemofpowerqualityoccursimultaneouslywillbemorecommonTheUnitedPowerQualityConditioner(UPQC)，whichpossessestheabilityofcomprehensive

3、compensation，becomesresearchfocusgraduallyOnthebasisofpreliminaryworkofthistopicwestudieddomesticandforeignresearchresults，analyzingtheproblemsandsolutionsofpowerqualityThoughanalyzingresearchstatusofUPQCtopologydetectio

4、nmethodsofcompensationandcontrolstrategywecallgetnecessityofthispaperagainstdisadvantagesoftheexistingmethodFortheproblemthatwecan’tdetectthecompensationaccuratelybasedonp—qandipiqoftransientreactivepowertheoryundertheci

5、rcumstanceofvoltagedistortionthispaperproposesadetectionmethodofcompensationsignalbasedonsynchronouscoordinatetransformation，whichcansolvetheproblemeffectivelyInadditioninordertoextendeffectivecompensationtimeandreduceco

6、stoftheenergystorageunit，optimizingexchangeprocessofactivepowerbetweenserialconverterandsystemInthispaperminimumenergycompensationmethodisadoptedanditseffectivenessisverifiedthroughsimulationTraditionalhysteresislooptrac

7、kingcontrolissimpleandwidelyusedButthenon’constantofswitchfrequencyleadstogreatlossInthenewalgorithmwecanmakethefrequencyconstantbychangingtheHysteresiswidthandthenfortheproblemofinterphaseinterferenceinthreephasethree。w

8、iresystem，constantfrequencyhysteresistrackingcontrolmethodbasedonspacevoltagevectorisproposed，meanwhile，theproblemthatswitchfrequencyisunstableandthecontrolledvariableisuncontrollableduringtranspositionofloadissolveditsf

9、easibilityisverifiedthroughsimulationAtlast，webuildthemaincircuitanddesignthesignaldetectionandconditioningcircuits，powercircuit，circuitthatproducesperiodicsignal，drivecircuitandSOon，theharmoniccurrentcompensationonparal