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1、WORD格式整理版摘要近年來(lái),一些清潔高效的能源,如太陽(yáng)能,風(fēng)能,地?zé)?,核能等得到了較為廣泛的應(yīng)用和關(guān)注,其發(fā)電系統(tǒng)產(chǎn)生的是直流電流和電壓,而許多負(fù)載都使用交流電,因此需要通過(guò)逆變器把直流電變成交流電。隨著這些新能源發(fā)電系統(tǒng)的日益推廣,逆變器的使用也越來(lái)越多。如何獲得高質(zhì)量的電流成為研究的焦點(diǎn)。由于對(duì)高頻諧波的抑制效果明顯好于L型濾波器,因此LCL濾波器在并網(wǎng)逆變器中應(yīng)用越來(lái)越廣泛,與傳統(tǒng)的L濾波器相比,LCL濾波器可以降低電感量,提高系統(tǒng)動(dòng)態(tài)性能,降低成本,在中大功率應(yīng)用場(chǎng)合,其優(yōu)勢(shì)更為明顯。文章首先對(duì)PWM逆變器的工作原理做了詳細(xì)的介紹,并對(duì)基于LCL的濾波器,在ABC靜
2、止坐標(biāo)系,αβ靜止坐標(biāo)系和dq旋轉(zhuǎn)坐標(biāo)系中建立了數(shù)學(xué)模型。其次,文章討論了LCL濾波器的參數(shù)設(shè)計(jì)方法,給出了系統(tǒng)LCL濾波器參數(shù)的設(shè)計(jì)步驟。最后,在詳細(xì)闡述各元件的取值原則與計(jì)算步驟的基礎(chǔ)上,給出了設(shè)計(jì)實(shí)例,并對(duì)所設(shè)計(jì)的逆變器進(jìn)行了仿真驗(yàn)證,結(jié)果表明,根據(jù)該方案設(shè)計(jì)的控制器參數(shù)能夠使三相并網(wǎng)逆變器安全、可靠運(yùn)行且具有較快的動(dòng)態(tài)響應(yīng)速度。關(guān)鍵詞:并網(wǎng)逆變器LCL濾波器有源阻尼無(wú)源阻尼,雙閉環(huán)控制學(xué)習(xí)參考好幫手WORD格式整理版AbstractInrecentyears,cleanandefficientenergysources,suchassolarenergy,winden
3、ergy,geothermalenergy,nuclearenergyhasbeenwidelyusedandhasgainedwidespreadattention.ThepowersystemproducetheDCcurrentandvoltage,andmanyareusingtheACload,itneedinverterintoalternatingcurrenttodirectcurrent.Withtheincreasingpromotionofphotovoltaicpowergenerationsystems,theuseofinvertersismore
4、andmore.Howtogetahighqualityofthecurrentbecomesthefocusofresearch.BecauseoftheinhibitoryeffectofhighfrequencyharmonicsisbetterthanL-typefilter,theLCLfiltergridinverteriswidelyapplied,comparedwiththetraditionalL-filter,LCLfiltercanreducetheinductanceimprovethesystemdynamicperformance,reducec
5、osts,inthehigh-powerapplications,itsadvantagesmoreapparent.ThispaperanalyzesthehighfrequencyPWMinverterprinciple,andthenpresentsathree-phaseABCcoordinatesanddqcoordinatesystemonthemathematicalmodelofLCL-filterconfiguration.Secondly,thearticlediscussestheLCLfilterdesignparameters;parameterso
6、fthesystemaregivenLCLfilterdesignsteps.Finally,eachcomponentindetailtheprinciplesandcalculationstepsofthevaluebasedonthedesignexampleisgiven,andthedesignoftheLCLfiltersimulationresultsshowthat,accordingtothedesignofthecontrollerparameterscanmakethree-phaseinverterwithsafe,reliableoperationa
7、ndhasafastdynamicresponsespeed.Keywords:Grid-connectedinverter,LCLfilter,Activedamping,passivedamping,Doubleclosedloopcontrol學(xué)習(xí)參考好幫手WORD格式整理版目錄摘要......................................................................IAbstract..............................