Yuav ua li cas txhawm rau txhim kho kev ua haujlwm thiab lub zog tsim hluav taws xob ntawm photovoltaic inverter?

Qhov tseem ceeb ntawm Photovoltaic Inverter Conversion Efficiency

Nws yog ib qho tseem ceeb heev los txhim kho cov conversion efficiency ntawmphotovoltaic inverter . Piv txwv li, yog tias peb nce qhov kev hloov pauv tau los ntawm 1%, 500KW inverter tuaj yeem tsim ze li 20 ntau kilowatt teev hluav taws xob txhua hnub rau qhov nruab nrab ntawm 4 teev. Nws tuaj yeem tsim tau ze li ntawm 7,300 ntau kilowatt-teev hluav taws xob hauv ib xyoos, thiab 73,000 ntxiv kilowatt-teev hluav taws xob hauv kaum xyoo, uas yog sib npaug rau lub zog tsim hluav taws xob ntawm 5KW inverter. Nyob rau hauv txoj kev no, cov neeg siv khoom tuaj yeem txuag tau lub chaw nres tsheb fais fab nrog 5KW inverter, yog li txhawm rau txhim kho cov neeg siv khoom hauv qhov kev txaus siab zoo tshaj plaws, peb yuav tsum ua kom cov kev hloov pauv ntawm lub inverter kom ntau li ntau tau.

Cov yam ntxwv cuam tshuam rau photovoltaic inverter efficiency

Tib txoj hauv kev los txhim kho qhov ua tau zoo ntawm lub inverter yog txo qis. Lub ntsiab poob ntawm lub inverter yog los ntawm lub hwj chim hloov raj xws li IGBT thiab MOSFET, nrog rau cov khoom sib nqus xws li transformers thiab inductors. Cov kev poob yog cuam tshuam nrog tam sim no thiab voltage ntawm cov khoom thiab cov txheej txheem ntawm cov khoom xaiv. Muaj kev sib raug zoo. Kev poob ntawm IGBT feem ntau yog kev poob thiab hloov pauv. Qhov kev poob qis yog cuam tshuam nrog kev ua haujlwm sab hauv ntawm lub cuab yeej thiab qhov dhau tam sim no. Qhov kev hloov pauv tsis muaj feem cuam tshuam nrog qhov hloov zaus ntawm lub cuab yeej thiab DC voltage uas lub cuab yeej tiv taus.

Qhov poob ntawm inductor feem ntau suav nrog tooj liab poob thiab hlau poob. Copper poob yog hais txog qhov poob los ntawm qhov tsis kam ntawm cov inductor coil. Thaum cov tam sim no dhau los ntawm cov coil tsis kam thiab ua kom sov, ib feem ntawm cov hluav taws xob hluav taws xob yuav hloov mus rau hauv lub zog hluav taws xob thiab poob. Txij li thaum lub coil feem ntau yog ua los ntawm insulated tooj liab hlau Nws yog qhov txhab, yog li nws yog hu ua tooj liab poob. Kev poob tooj liab tuaj yeem suav tau los ntawm kev ntsuas qhov luv luv Circuit Court impedance ntawm transformer. Hlau poob muaj ob yam: ib qho yog hysteresis poob thiab lwm yam yog eddy tam sim no poob. Hlau poob tuaj yeem suav tau los ntawm kev ntsuas qhov tsis muaj load tam sim no ntawm transformer.

Yuav ua li cas los txhim kho cov efficiency ntawm photovoltaic inverter?

Tam sim no muaj peb txoj hauv kev: ib qho yog siv cov kev tswj xyuas xws li qhov chaw vector mem tes dav hloov kho kom txo qhov poob; lwm qhov yog siv cov khoom siv silicon carbide los txo cov kev tiv thaiv sab hauv ntawm cov khoom siv fais fab; qhov thib peb yog siv peb-theem, tsib-theem thiab lwm yam ntau-theem Flat hluav taws xob topology thiab cov tshuab hluav taws xob hloov hluav taws xob txo qhov hluav taws xob thoob plaws lub zog hluav taws xob thiab txo qhov hloov zaus ntawm lub zog hluav taws xob.

1. Voltage qhov chaw vector mem tes dav modulation

Nws yog txoj kev tswj hwm digital tag nrho nrog qhov zoo ntawm kev siv hluav taws xob DC siab thiab tswj tau yooj yim, thiab siv dav hauv inverters. Tus nqi siv hluav taws xob DC yog siab, thiab qis dua DC tsheb npav voltage tuaj yeem siv nyob rau hauv tib qhov tso zis hluav taws xob, yog li txo qhov kev ntxhov siab ntawm lub zog hloov hluav taws xob, qhov hloov pauv ntawm lub cuab yeej me dua, thiab kev hloov pauv ntawm inverter. yog txhim kho rau ib qho twg. kev txhim kho. Nyob rau hauv qhov chaw vector synthesis, muaj ntau yam vector ua ke ua ke txoj kev. Los ntawm kev sib txawv ntawm kev sib txuas thiab kev sib txuas, cov txiaj ntsig ntawm kev txo cov sij hawm hloov pauv ntawm cov khoom siv hluav taws xob tuaj yeem tau txais, yog li txo qis kev hloov pauv ntawm cov khoom siv hluav taws xob inverter.

2. Cov khoom siv siv cov khoom siv silicon carbide

Qhov kev tiv thaiv ib cheeb tsam ntawm silicon carbide li tsuas yog ib feem ntawm cov khoom siv silicon. Lub xeev tsis kam ntawm cov khoom siv hluav taws xob xws li IGBTs ua los ntawm cov khoom siv silicon carbide raug txo mus rau ib feem kaum ntawm cov khoom siv silicon zoo tib yam. Silicon carbide thev naus laus zis tuaj yeem txo qis qhov rov qab rov qab tam sim no ntawm lub diode yog me me, uas tuaj yeem txo qhov kev hloov pauv ntawm lub zog hluav taws xob, thiab lub peev xwm tam sim no xav tau los ntawm lub ntsiab hloov tseem tuaj yeem txo raws li. Yog li ntawd, siv silicon carbide diodes raws li cov anti-parallel diodes ntawm lub ntsiab hloov yog txoj kev zoo tshaj los txhim kho cov efficiency ntawm lub inverter. txoj kev. Piv nrog rau cov tsoos ceev ceev-rov qab silicon anti-parallel diodes, tom qab siv silicon carbide anti-parallel diodes, lub diode thim rov qab tam sim no txo ​​qis thiab tag nrho kev hloov dua siab tshiab tuaj yeem txhim kho los ntawm 1%. Tom qab siv IGBT ceev, qhov kev hloov pauv ceev tau nrawm dua thiab kev hloov pauv ntawm tag nrho lub tshuab tuaj yeem txhim kho los ntawm 2%. Thaum SiC anti-parallel diodes tau ua ke nrog IGBTs ceev, qhov ua tau zoo ntawm lub inverter yuav raug txhim kho ntxiv.

3. Mos switching thiab multi-level technology

Mos switching technology siv lub hauv paus ntsiab lus ntawm resonance los ua tam sim no los yog voltage nyob rau hauv lub switching ntaus ntawv hloov sinusoidally los yog quasi-sinusoidally. Thaum tam sim no ib txwm hla xoom, lub cuab yeej raug muab tua; Thaum qhov hluav taws xob ib txwm hla xoom, lub cuab yeej qhib. Qhov no txo ​​cov kev poob qis thiab daws cov teeb meem zoo li inductive tig-off thiab capacitive tig-on. Thaum qhov hluav taws xob hla lub raj hloov lossis qhov tam sim no ntws los ntawm lub raj xa hluav taws xob yog xoom, nws raug kaw lossis kaw, kom tsis muaj qhov hloov pauv hauv lub raj hloov. Piv nrog rau cov qauv ob-theem ib txwm, qhov tso zis ntawm peb-theem inverter nce qib xoom, thiab qhov kev ntxhov siab ntawm lub zog hluav taws xob yog halved. Vim tias qhov zoo dua no, ntawm tib lub sijhawm hloov pauv, lub inverter tuaj yeem siv cov khoom siv me me lim inductor dua li cov qauv ntawm ob theem, thiab inductor poob, tus nqi thiab ntim tuaj yeem txo tau zoo; thiab nyob rau tib cov zis harmonic cov ntsiab lus, lub inverter yuav siv ib tug tsawg switching zaus tshaj li ob-theem qauv, cov cuab yeej hloov pauv poob yog me me, thiab cov conversion efficiency ntawm lub inverter yog zoo dua.