基于改进下垂控制的微电网运行控制-研究

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1、上海电机学院硕士学位论文(5)基于MATLAB/Simulink仿真平台，对本研究提出的控制策略进行了计算机仿真，验证了其有效性，并通过对比的方式说明了本研究提出方法的先进性。(6)以TMS320LF2407A为基础，对逆变器的硬件电路和软件程序进行了设计，搭建了样机，对本课题设计的主要控制策略进行了实验验证。关键词：微电网、单相逆变器、dq变换、虚拟阻抗、下垂控制、环流、二次调频II万方数据上海电机学院硕士学位论文THERESEARCHONMICROGRIDOPERATIONCONTROLBASEDONIMPROVEDDROOPCONTROLABSTRACTDuetotheadversee

2、nvironmentalimpactsandthehugecostsandlossesinlongtransmissionlinesoflargecentralizedgenerators,distributedgenerationsystemwithrenewableenergyhasdevelopedatarapidspeedinthepastfewdecades.Withtheincreasingnumbersofdistributedgenerations,howtomanagethemefficientlyhavealreadybecomeahotresearchtopicatpr

3、esent.Tosolvethisproblem,theconceptofMicroGridwaspresentedbydomesticandforeignscholars,andtheMicroGridhassoonbecomeamainstreamcontrolstrategyofthedistributedgenerationsbecauseofitsflexibilityandreliability.ThispaperhasdescribedthedifferentcontrolstrategiesoftheMicroGridafterconsultingmaterialsandda

4、ta,andchooseDroopcontrolstrategyastheresearchobject,themaindetailsofthispaperareasfollows：(1)Amathematicalmodelofthesingle-phaseinverterbasedonrotatingquadrantswasproposed,andthedouble-loopcontrollerwasalsodesignbasedonfeedforwarddecoupling;(2)Tosolvetheproblemofoutputimpedancemismatchandrestrainci

5、rculatingcurrentamongtheparallelinverters,thevirtualimpedancebaseonrotatingquadrantswasproposed.(3)Toachievepower-sharingamongparallelinvertersintheMicroGrid,improveddroopcontrolschemewasdesigned.(4)Toachievethefunctionof“plugandplay”andpower-sharinginmicrogrid,severaldifferentconditionswhentheDGsc

6、onnectedordisconnectedtothemicrogridhadbeenresearched.Byusingsecondaryfrequencymodulation,thecirculationwaseliminatedeffectively,andtherecoverytimetosteadystatewasalsoreduced.III万方数据上海电机学院硕士学位论文(5)Therationalityandfeasibilityofthesestrategieshadbeenprovedthroughcomparingandanalyzingthedifferentsimu

7、lationresultsbyusingMATALAB/Simulink.(6)Atlast,inordertoprooftheproposedstrategies,aprototypeinverterwithsoftwareandhardwarewasdesignedbasedonTMS320LF2407A.KEYWORDS:MicroGrid,single-phaseinverter,rotatingqu