Kev piav qhia txog PV inverter Inverter, tseem hu ua lub zog tswj, siv tau rau hauv cov tshuab hluav taws xob hnub ci ua cov khoom siv hluav taws xob ywj pheej lossis txuas nrog grid. Raws li waveform modulation, inverters tuaj yeem yog square wave, step wave, sine wave, lossis integrated three-phase. Hauv cov tshuab txuas nrog grid, inverters tuaj yeem yog transformer-type lossis transformer tsawg dua. Cov qauv ntawm PV inverter Cov khoom siv semiconductor ua rau lub voj voog boost thiab inverter bridge circuit ntawm inverter, uas kho lub zog hloov pauv AC ncaj qha. Hauv qab no yog cov khoom siv semiconductor tseem ceeb:
(1) Lub sensor tam sim no: xav tau qhov tseeb siab, teb sai, tsis kub, tsis kub, thiab lwm yam, cov sensor tam sim no sib txawv siv zog sib txawv, feem ntau yog Hall tam sim no sensor rau kev kuaj tam sim no;
(2) Tam sim no transformer: dav dav tam sim no, feem ntau BRS series;
(3) Reactor. Lub hauv paus ntsiab lus ua haujlwm ntawm PV inverters PV inverters muaj lub voj voog boost thiab lub voj voog inverter bridge. Lub voj voog boost boosts lub DC voltage rau lub zog tso zis, thaum lub voj voog choj hloov nws mus rau qhov zaus AC voltage. Yog li, lub voj voog boost thiab inverter bridge hloov DC fais fab mus rau AC points. Photovoltaic inverters muaj 10 qhov teeb meem thiab cov txheej txheem ua haujlwm.
1. Teeb Meem Txog Kev Siv Hluav Taws Xob Qhov hluav taws xob qis dhau, siab dhau thiab zaus dhau yog qhov teeb meem ntawm kev siv hluav taws xob (cov lej yuam kev F00-F03).① Txheeb xyuas seb lub tshuab puas ua tau raws li cov qauv kev nyab xeeb hauv zos.② Xyuas kom tseeb tias cov kev sib txuas ntawm AC tso zis thiab ntsuas qhov hluav taws xob siv lub multimeter.③ Tshem lub PV input, rov pib dua lub tshuab, thiab xyuas seb puas ua haujlwm li qub.④ Yog tias qhov teeb meem tseem muaj, hu rau tus neeg faib khoom.
2. Qhov yuam kev tsis muaj zog rwb thaiv tsev F07. ① Tshem tawm qhov nkag PV, rov pib dua lub tshuab, thiab xyuas seb puas ua haujlwm tas li. ② Xyuas kom tseeb tias PV+ thiab PV- av tsis kam tshaj 500KΩ. Yog tias muaj teeb meem qis dua 500KΩ, hu rau tus neeg faib khoom inverter hauv zos lossis tus neeg muab roj teeb kom tau kev pab.
3. Tam sim no xau ntau dhau F20 yuam kev Tshem tawm lub PV input, rov pib dua lub tshuab, thiab xyuas seb puas ua haujlwm ib txwm.② Yog tias ua tsis tiav, hu rau tus neeg faib khoom.
4. Qhov kub ntawm lub tshuab cua txias thiab qhov kub ntawm ib puag ncig siab dhau F12, F13 yuam kev. ① Tshem tawm qhov nkag PV, rov pib dua lub tshuab, thiab xyuas seb puas ua haujlwm tas li tom qab ob peb feeb txias. ② Xyuas seb qhov kub ntawm ib puag ncig puas tshaj qhov ntau ntawm lub tshuab. Yog tias qhov teeb meem tseem muaj, hu rau tus neeg faib khoom.
5. Kev saib xyuas yam tsis muaj cov ntaub ntawvWiFi taug qab: Txuas lub inverter WiFi, xyuas nplooj ntawv saib xyuas rau cov ntaub ntawv inverter, rov ntsaws lub WiFi module ua-hauv lossis xyuas qhov kev sib txuas WiFi RS485 sab nraud yog tias tsis muaj cov ntaub ntawv inverter, thiab yog tias koj tsis tuaj yeem tshawb nrhiav lub inverter WiFi, xyuas lub WiFi module ua-hauv rau kev sib cuag tsis zoo lossis lub zog WiFi sab nraud. Txhawm rau saib xyuas GPRS, sim lub zog teeb liab hauv Is Taws Nem ntawm tib tus neeg muab kev pabcuam ntawm qhov chaw teeb tsa inverter. Xyuas seb puas muaj kev sib cuag tsis muaj zog lossis cov GPRS modules sab nraud tsis muaj zog.
6. Kev tiv thaiv hluav taws xob tsis zoo Siv kev zam. Tshem tawm tag nrho cov xov hluav taws xob ntawm sab nkag ntawm lub inverter, tom qab ntawd txuas lawv ib qho zuj zus, siv lub inverter fais fab-rau nrhiav kev tiv thaiv hluav taws xob kom nrhiav tau cov kab teeb meem, xyuas lub DC connector rau lub bracket luv luv uas dej nyab lossis lub bracket luv luv uas hlawv, thiab xyuas cov khoom puas muaj qhov dub hlawv ntawm ntug uas ua rau cov khoom xau.
7. Qhov teeb meem ntawm qhov hluav taws xob xau Cov khoom siv tsis zoo, kev teeb tsa tsis zoo, thiab qhov chaw tsis tsim nyog ua rau qhov teeb meem no hnyav zuj zus. Muaj ntau qhov tsis ua haujlwm: cov khoom siv DC tsis zoo, cov khoom sib txuas, qhov siab ntawm kev teeb tsa tsis tsim nyog, cov khoom siv txuas nrog lub grid tsis zoo lossis dej xau, thiab cov teeb meem zoo sib xws tuaj yeem pom los ntawm qhov chaw txau dej ** thiab daws tau los ntawm kev rwb thaiv tsev zoo. Yog tias qhov teeb meem yog qhov xwm txheej ntawm cov khoom siv, hloov cov khoom siv.
8. Lub inverter tsis teb cov xov hlau DC input yuav tsum tsis txhob tig rov qab, qhov kev sib txuas DC ib txwm muaj cov nyhuv tiv thaiv kev dumbing tab sis cov crimp terminals tsis ua. Thov nyeem phau ntawv qhia inverter kom paub tseeb tias cov terminals zoo thiab tsis zoo thiab crimp yog qhov tseem ceeb. Lub inverter txoj kev tiv thaiv rov qab luv luv tso cai rau nws pib li qub tom qab cov xov hlau ib txwm muaj.
9. Qhov txhaum ntawm lub gridGrid overvoltage: Qhov hnyav ntawm kev ua haujlwm (kev siv hluav taws xob ntau teev ua haujlwm) thiab qhov hnyav me me (kev siv hluav taws xob tsawg lub sijhawm so) tau pom ntawm no, ua ntej los soj ntsuam qhov voltage ntawm lub grid, thiab cov tuam txhab tsim inverter los sib txuas lus nrog lub grid kom ua kev sib xyaw ua ke ntawm thev naus laus zis kom ntseeg tau tias qhov project tsim nyob rau hauv qhov ntau thiab tsawg, tsis txhob "xav tias tsis muaj txiaj ntsig", tshwj xeeb tshaj yog nyob rau hauv cov hluav taws xob nyob deb nroog, lub inverter rau lub grid, lub inverter yog qhov tseem ceeb heev. Cov grids nyob deb nroog thiab inverters muaj qhov voltage, waveform thiab qhov deb txwv nruj. Feem ntau cov teeb meem overvoltage yog tshwm sim los ntawm cov hluav taws xob me me ntawm lub grid dhau lossis ze rau cov nqi tiv thaiv kev nyab xeeb. Yog tias txoj kab grid ntev dhau lossis tsis zoo, lub Hoobkas fais fab tsis tuaj yeem ua haujlwm ib txwm thiab ruaj khov. Cov lus teb yog txiav txim siab lub hwj chim muab hluav taws xob los sib koom ua ke qhov voltage lossis txiav lub grid thiab saib xyuas qhov zoo ntawm kev tsim kho chaw tsim hluav taws xob. "Grid under-voltage": Qhov teeb meem no zoo ib yam li lub grid over-voltage, tab sis nws kuj tseem tuaj yeem ua rau muaj qhov voltage cuav yog tias cov voltage theem ywj pheej qis dhau, qhov faib khoom ntawm lub grid tsis tiav, thiab cov theem ntawm lub grid poob lossis txiav. Zaus ntawm lub Grid Tshaj/Qis Dua: Zaus ntawm lub Grid Tshaj/Qis Dua: Qhov muaj qhov teeb meem no hauv lub grid ib txwm qhia tias lub grid tsis zoo. Tsis muaj hluav taws xob hauv lub grid? Xyuas cov kab khi grid. Xyuas seb puas muaj qhov tsis zoo ntawm theem grid, lossis tsis muaj kab hluav taws xob.
10. Kev tiv thaiv DC overvoltageNrog rau kev nrhiav kev txhim kho cov txheej txheem ua haujlwm siab, qib fais fab raug hloov kho tas li kom nce, ib yam li cov khoom qhib-circuit voltage thiab operating voltage. Cov coefficients kub yuav tsum tau xav txog thaum tsim qauv kom tsis txhob overvoltage thiab kev puas tsuaj rau cov khoom siv ntawm qhov kub qis.
RAU LUB SIJ HAWM TXUJ CI HAUV KEV TSIM KHO COV PV INVERTERS
Qauv 1: Cov khoom siv inverter tab tom hloov pauv sai sai, suav nrog SiC, CAN, DSP thiab cov topology tshiab, ua rau muaj kev ua haujlwm zoo dua. Tuam Tshoj txoj kev ua haujlwm tau mus txog A +, nrog lub hom phiaj ntawm A +++.
Qhov Sib Txawv 2: lub zog inverter hauv nruab nrab, kev ua haujlwm zoo, qhov hluav taws xob nce ntxiv. 2.5MW thiab lwm yam inverters qib siab dua yuav raug siv dav vim tias lawv raug nqi kwv yees li 0.1 yuan / W tsawg dua 1MW square array, txo qhov kev siv nyiaj pib ntawm 10 lab rau lub chaw tsim hluav taws xob 100MW. Kev sib phim cable lav qhov poob ntawm DC qhov sib xws. Lub kaw lus 1500V yuav tswj hwm kev tsim kho lub chaw tsim hluav taws xob loj. Tsuas yog cov khoom sib xyaw, nws txuag tau 0.2 yuan / W, lossis 20 lab rau lub chaw tsim hluav taws xob 100MW.
Qhov Sib Txawv 3: Cov inverters hlua tab tom nce ntxiv hauv lub zog ceev thiab lub zog ib chav. Cov inverters hlua txuas ntxiv mus nce ntxiv hauv lub zog txog li 80kW, nce ntxiv hauv lub zog ceev, thiab txo qhov hnyav rau cov ntawv thov nyuaj uas kev teeb tsa thiab kev saib xyuas nyuaj. 40kW hlua inverters los ntawm Sunny Power yog lub teeb tshaj plaws hauv kev lag luam, hnyav tsuas yog 39kg. Sunny Power ib txwm siv lub kiv cua txias ntse los tiv thaiv kev nce ntawm qhov kub ntawm cov khoom sab hauv thiab txhim kho lub peev xwm overload ntawm inverter hauv cov xwm txheej kub siab.
Qhov Sib Txawv 4: Ntau Cov Khoom Siv Qib Module Modules xws li Enphase microinverters thiab SolarEdge lub zog optimizers tab tom dhau los ua ntau dua. Lub tuam txhab tshawb fawb kev lag luam GTM xav tias kev xa khoom ntawm module-level power electronics (MLPE) yuav nce ntxiv los ntawm 1.1GW hauv xyoo 2013 mus rau ntau dua 5GW hauv xyoo 2017.
Qauv 5: Kev Hloov Kho Grid thiab Kev Nyab Xeeb thiab Kev Tiv Thaiv Kev Ntseeg Siab Zoo Dua Kev tiv thaiv kev xau, SVG kev ua haujlwm, LVRT, DC module tiv thaiv, kev tiv thaiv kev ntsuas impedance rwb thaiv tsev, kev tiv thaiv PID, kev tiv thaiv xob laim, PV positive thiab negative reverse polarity tiv thaiv, thiab lwm yam ntxwv uas txhim kho tas li ua rau grid adaptability thiab system kev nyab xeeb ntawm cov inverters.
Qhov Sib Txawv 6: Kev hloov pauv ib puag ncig ntawm lub inverter Nrog rau kev siv ntau ntxiv ntawm cov chaw tsim hluav taws xob photovoltaic hauv cov chaw ib puag ncig hnyav xws li ntug dej hiav txwv, suab puam, toj siab, thiab lwm yam, qhov kev tiv thaiv corrosion, xuab zeb tsis kam, thiab lwm yam kev hloov pauv ib puag ncig ntawm lub inverter tau txhim kho kom ntseeg tau tias muaj kev ntseeg siab.
Zhao Wei tau hais tias los ntawm ntau yam thev naus laus zis tshiab, kev siv cov khoom tshiab txuas ntxiv txhawb nqa PV thev naus laus zis, txhim kho kev ua haujlwm zoo ntawm lub kaw lus PR, txo cov nqi hluav taws xob lub neej voj voog (LCOE), thiab thaum kawg ua tiav Internet parity, uas yog txhua tus neeg txoj kev tawm tsam. Kev tsim qauv chaw nres tsheb fais fab yuav raug hloov kho, kev sib koom ua ke ntawm lub kaw lus zoo dua, thiab kev daws teeb meem inverter, nruab nrab voltage transformer tuaj yeem ua kom lub kaw lus yooj yim heev, txo cov nqi, yooj yim siv, ua haujlwm tau zoo, thiab kev ntseeg siab. Kev txhim kho kev lag luam PV inverter tab tom nce siab, ntau yam thev naus laus zis tshiab, cov khoom tshiab, hloov pauv tas li, hloov kho rau cov xwm txheej hauv zos, ib puas qhov kev sib tw; hauv cov chaw nres tsheb fais fab hauv av loj, cov kev daws teeb meem centralized rau kev nqis peev thawj zaug qis dua, tom qab kev ua haujlwm thiab kev saib xyuas cov nqi tsuas yog 1/3 xwb, ntau qhov txiaj ntsig ntawm kev ua haujlwm ntawm chaw nres tsheb fais fab qhia tias kev tsim hluav taws xob string nrog centralized yog qhov kev xaiv nyiam ntawm tus neeg siv; 2/2.5M String inverters hauv cov ntawv thov faib tawm kuj tseem loj hlob, thiab lub zog siab, kev ua haujlwm tau zoo, thiab lub zog ceev yog cov lus qhia yav tom ntej. PV + Internet yuav dhau los ua lub hauv paus, thiab PV + daim ntawv thov khaws cia zog yuav muaj yav tom ntej ci ntsa iab.
