Lub tshuab hluav taws xob photovoltaic off-grid feem ntau yog siv los daws cov teeb meem kev siv hluav taws xob yooj yim ntawm cov neeg nyob hauv thaj chaw uas tsis muaj hluav taws xob lossis hluav taws xob tsawg. Lub tshuab hluav taws xob photovoltaic off-grid tsim hluav taws xob feem ntau yog tsim los ntawm photovoltaic modules, brackets, controllers, inverters, roj teeb thiab lub zog xa hluav taws xob. Piv nrog rau photovoltaic grid-connected system, off-grid system muaj ntau controllers thiab roj teeb, thiab lub inverter ncaj qha tsav lub load, yog li cov hluav taws xob system yog ntau nyuaj. Txij li thaum lub kaw lus off-grid tej zaum yuav yog tus neeg siv khoom siv hluav taws xob nkaus xwb, thiab tus neeg siv tau nyob ntawm qhov system, kev tsim thiab kev ua haujlwm ntawm cov kab hluav taws xob off-grid yuav tsum muaj kev ntseeg siab dua.
Feem ntau tsim teeb meem rau off-grid systems
Tsis muaj kev qhia tshwj xeeb rau photovoltaic off-grid systems. Nws yuav tsum tau tsim raws li cov kev xav tau ntawm cov neeg siv, feem ntau yog xav txog kev xaiv thiab suav cov khoom, inverters, controllers, roj teeb, cables, keyboards thiab lwm yam khoom siv. Ua ntej tsim qauv, kev ua haujlwm ua ntej yuav tsum ua kom zoo. Nws yog ib qho tsim nyog yuav tsum xub nkag siab txog tus neeg siv cov khoom thauj khoom thiab lub zog, kev nyab xeeb ntawm qhov chaw teeb tsa, tus neeg siv hluav taws xob siv hluav taws xob, thiab qhov xav tau ua ntej kev npaj.
1. Qhov voltage ntawm lub module thiab qhov voltage ntawm lub roj teeb yuav tsum sib phim. PWM maub los hnub ci module thiab lub roj teeb txuas nrog los ntawm kev hloov hluav taws xob. Tsis muaj inductance thiab lwm yam khoom siv hauv nruab nrab. Qhov voltage ntawm lub module yog nyob nruab nrab ntawm 1.2 thiab 2.0 zaus ntawm qhov voltage ntawm lub roj teeb. Yog hais tias nws yog 24V roj teeb, qhov input voltage ntawm cov khoom yog nyob nruab nrab ntawm 30-50V, MPPT maub los muaj lub hwj chim hloov raj thiab inductor thiab lwm yam circuits nyob rau hauv nruab nrab, qhov voltage ntawm cov khoom yog nyob nruab nrab ntawm 1. {8}}.5 npaug ntawm qhov hluav taws xob ntawm lub roj teeb, yog tias nws yog 24V roj teeb, Cov khoom siv hluav taws xob yog nyob nruab nrab ntawm 30-90V.
2. Lub zog tso zis ntawm lub module yuav tsum zoo ib yam li lub hwj chim ntawm tus maub los. Piv txwv li, 48V30A maub los muaj lub zog tso zis ntawm 1440VA, thiab lub zog ntawm lub module yuav tsum nyob ib ncig ntawm 1500W. Thaum xaiv tus maub los, ua ntej saib qhov voltage ntawm lub roj teeb, thiab tom qab ntawd faib cov khoom siv hluav taws xob los ntawm qhov hluav taws xob ntawm lub roj teeb, uas yog cov zis tam sim no ntawm tus maub los.
3. Yog tias lub zog ntawm ib lub inverter tsis txaus, ntau lub inverters yuav tsum tau txuas nrog rau qhov sib npaug. Cov zis ntawm photovoltaic off-grid system yog txuas nrog lub load. Cov zis voltage thiab tam sim no theem thiab amplitude ntawm txhua inverter yog txawv. Yog hais tias lub terminals txuas nrog nyob rau hauv parallel, ib tug inverter nrog parallel muaj nuj nqi yuav tsum tau ntxiv.
Tej teeb meem thaum debugging off-grid systems
1 Lub inverter LCD tsis tso saib 01
Kev soj ntsuam tsis tiav
Tsis muaj roj teeb DC input, lub inverter LCD fais fab mov yog powered los ntawm lub roj teeb.
02 Yog vim li cas
(1) Lub roj teeb voltage tsis txaus. Thaum lub roj teeb thawj zaug tawm ntawm lub Hoobkas, nws feem ntau them tag nrho, tab sis yog tias lub roj teeb tsis siv ntev, nws yuav maj mam tso tawm (tus kheej tawm). Off-grid system voltages yog 12V, 24V, 48V, 96V, thiab lwm yam. Nyob rau hauv ib co kev siv, ntau lub roj teeb yuav tsum tau txuas nrog series kom tau raws li qhov system voltage. Yog tias cov kab txuas txuas tsis raug txuas, lub roj teeb voltage yuav tsis txaus.
(2) Lub roj teeb terminals yog thim rov qab. Cov roj teeb terminals muaj cov ncej zoo thiab tsis zoo, feem ntau yog liab txuas nrog tus ncej zoo, thiab dub txuas nrog tus ncej tsis zoo.
(3) DC hloov tsis raug kaw lossis qhov hloov pauv tsis raug.
03
Kev daws
(1) Yog tias lub roj teeb hluav taws xob tsis txaus, lub kaw lus tsis tuaj yeem ua haujlwm, thiab lub hnub ci zog tsis tuaj yeem them lub roj teeb, koj yuav tsum nrhiav lwm qhov chaw kom them lub roj teeb ntau dua 30 feem pua.
(2) Yog hais tias nws yog ib qho teeb meem ntawm txoj kab, siv lub multimeter los ntsuas qhov voltage ntawm txhua lub roj teeb. Thaum qhov hluav taws xob zoo li qub, tag nrho qhov hluav taws xob yog qhov sib npaug ntawm cov roj teeb voltages. Yog tias tsis muaj qhov hluav taws xob, xyuas seb qhov hloov DC, txuas lub davhlau ya nyob twg, cable txuas, thiab lwm yam.
(3) Yog tias lub roj teeb hluav taws xob zoo li qub, cov xaim hluav taws xob zoo li qub, qhov hloov pauv tau qhib, thiab lub inverter tseem tsis pom, tej zaum yuav yog lub inverter yog qhov tsis raug, thiab cov chaw tsim khoom yuav tsum tau ceeb toom rau kev saib xyuas.
2 Lub roj teeb tsis tuaj yeem them
01 Failure Analysis
Lub roj teeb yog them los ntawm photovoltaic module thiab cov maub los, lossis lub mains thiab cov maub los.
02 Yog vim li cas
(1) Cov laj thawj: cov khoom siv hluav taws xob tsis txaus, lub hnub ci qis, thiab cov khoom siv thiab DC cable txuas tsis zoo.
(2) Lub roj teeb hluav taws xob thaiv hluav taws xob tsis zoo.
(3) Lub roj teeb tau them tag nrho thiab ncav cuag qhov siab tshaj plaws.
03 Kev daws teeb meem
(1) Xyuas seb lub DC keyboards, terminals, cable connectors, Cheebtsam, roj teeb, thiab lwm yam. Yog tias muaj ntau yam khoom sib txuas, lawv yuav tsum tau txuas thiab sim cais.
(2) Thaum lub roj teeb tau them tag nrho, nws tsis tuaj yeem them rov qab, tab sis cov roj teeb sib txawv muaj qhov sib txawv thaum them tag nrho. Piv txwv li, lub roj teeb uas muaj qhov ntsuas hluav taws xob ntawm 12V muaj qhov hluav taws xob ntawm 12.8 thiab 13.5V thaum them tag nrho. Qhov tshwj xeeb lub ntiajteb txawj nqus ntawm cov electrolyte thaum lub roj teeb tag nrho muaj feem xyuam nrog. Kho qhov siab tshaj plaws voltage txwv raws li hom roj teeb.
(3) Input overcurrent: Qhov them tam sim no ntawm lub roj teeb feem ntau yog 0.1C-0.2C, thiab qhov siab tshaj plaws tsis ntau tshaj 0.3C. Piv txwv li, ib lub roj teeb lead-acid 12V200AH, qhov them tam sim no feem ntau yog nruab nrab ntawm 20A thiab 40A, thiab qhov siab tshaj plaws tsis tuaj yeem tshaj 60A. Lub zog tivthaiv yuav tsum sib phim lub zog tswj.
(4) Input overvoltage: Lub input voltage ntawm lub module yog siab dhau lawm, xyuas qhov voltage ntawm lub roj teeb lub rooj tsavxwm, yog hais tias nws yog tiag tiag siab, qhov ua tau yog vim li cas cov hlua ntawm lub roj teeb lub rooj tsavxwm yog ntau dhau, txo tus naj npawb. ntawm cov hlua ntawm lub roj teeb board
3 Lub inverter qhia overload los yog tsis tuaj yeem pib 01
Kev soj ntsuam tsis tiav
Lub zog thauj khoom ntau dua li lub zog inverter lossis roj teeb.
02 Yog vim li cas
(1) Inverter overload: Yog hais tias lub inverter overload tshaj lub sij hawm ntau, thiab lub hwj chim load tshaj tus nqi siab tshaj, kho qhov load loj.
(2) Lub roj teeb ntau dhau: Cov paug tawm tam sim no feem ntau yog 0.2C-0.3C, qhov siab tshaj plaws tsis tshaj 0.5C, 1 12V200AH lead-acid roj teeb, lub siab tshaj plaws tso zis hwj chim tsis tshaj 2400W, txawv manufacturers, txawv qauv, tshwj xeeb cov nqi kuj txawv.
(3) Loads xws li elevator tsis tuaj yeem txuas ncaj qha mus rau qhov chaw tso zis ntawm lub inverter, vim tias thaum lub elevator nqis los, lub cev muaj zog rov qab, uas yuav ua rau lub zog rov qab electromotive, uas yuav ua rau lub inverter puas thaum nws nkag mus rau hauv inverter. Yog tias yuav tsum tau siv cov kab hluav taws xob tawm, nws raug nquahu kom ntxiv qhov hloov pauv zaus ntawm lub inverter thiab lub elevator lub cev muaj zog.
(4) Lub zog pib ntawm inductive load yog loj heev.
03 Kev daws teeb meem
Qhov ntsuas lub zog ntawm lub load yuav tsum qis dua li ntawm lub inverter, thiab lub siab tshaj plaws lub zog ntawm lub load yuav tsum tsis txhob siab tshaj 1.5 npaug ntawm lub zog ntawm lub inverter.
Roj teeb FAQ
1 Short circuit phenomenon thiab yog vim li cas
Lub luv luv Circuit Court ntawm lead-acid roj teeb yog hais txog kev sib txuas ntawm cov pab pawg zoo thiab tsis zoo hauv cov roj lead-acid. Lub luv luv-circuit tshwm sim ntawm txhuas-acid roj teeb feem ntau tshwm sim nyob rau hauv cov nram qab no yam:
Qhov qhib hluav taws xob hluav taws xob qis qis, thiab qhov hluav taws xob kaw hluav taws xob (tso tawm) sai sai mus txog qhov kev txiav tawm hluav taws xob. Thaum ib tug loj tam sim no tawm, lub davhlau ya nyob twg voltage poob sai heev rau xoom. Thaum lub Circuit Court qhib, qhov ceev ntawm electrolyte yog tsawg heev, thiab cov electrolyte yuav khov nyob rau hauv ib qho chaw uas tsis muaj kub. Thaum them nyiaj, qhov voltage nce qeeb heev, ib txwm nyob qis (qee zaum poob rau xoom). Thaum them nyiaj, qhov kub ntawm electrolyte nce sai heev. Thaum lub sij hawm them nyiaj, qhov ceev ntawm electrolyte nce qeeb heev los yog tsis tshua hloov. Tsis muaj npuas lossis roj tshwm lig thaum them nyiaj.
Lub ntsiab yog vim li cas rau lub internal luv luv Circuit Court ntawm lead-acid roj teeb yog raws li nram no:
Qhov zoo ntawm cov khoom sib cais tsis zoo lossis tsis zoo, yog li cov khoom siv ntawm cov phaj hla dhau, ua rau muaj kev sib cuag virtual lossis ncaj qha ntawm cov phaj zoo thiab tsis zoo. Qhov kev txav ntawm cov khoom sib cais ua rau cov phaj zoo thiab tsis zoo sib txuas. Cov khoom nquag ntawm lub phaj electrode nthuav dav thiab ntog tawm. Vim yog cov khoom tso tawm ntau dhau ntawm cov khoom siv poob qis, cov ntug qis lossis sab ntug ntawm cov phaj zoo thiab tsis zoo yog nyob rau hauv kev sib cuag nrog cov sediment, uas ua rau kev sib txuas ntawm cov phaj zoo thiab tsis zoo. Ib qho khoom siv hluav taws xob poob rau hauv lub roj teeb, ua rau cov phaj zoo thiab tsis zoo sib txuas.
Phenomenon thiab ua rau ntawm 2-ncej sulfation
Phaj sulfation system yog cov hmoov txhuas sulfate uas tsim cov dawb thiab tawv txhuas sulfate crystals ntawm lub phaj, thiab nws nyuaj heev los hloov mus rau hauv cov khoom nquag thaum them nyiaj. Lub ntsiab tshwm sim tom qab sulfation ntawm txhuas-acid roj teeb daim hlau yog raws li nram no:
(1) Qhov hluav taws xob ntawm cov roj lead-acid roj teeb tau nce sai heev thaum lub sijhawm them nyiaj, thiab nws qhov pib thiab qhov kawg voltages siab dhau lawm, thiab qhov kawg them hluav taws xob tuaj yeem ncav cuag li 2.90V / ib lub xov tooj ntawm tes.
(2) Thaum lub sijhawm tso tawm, qhov hluav taws xob txo qis sai, uas yog, nws poob rau qhov kev txiav tawm hluav taws xob ntxov, yog li nws lub peev xwm qis dua li ntawm lwm cov roj teeb.
(3) Thaum them nyiaj, qhov kub ntawm cov electrolyte nce sai thiab yooj yim tshaj 45 degree.
(4) Thaum lub sij hawm them nyiaj, qhov ceev ntawm cov electrolyte yog qis dua li tus nqi ib txwm muaj, thiab npuas tshwm sim ntxov thaum them nyiaj.
Lub ntsiab yog vim li cas rau sulfation ntawm lub phaj yog raws li nram no:
(1) Thawj qhov kev them nyiaj ntawm cov roj ntsha lead-acid tsis txaus lossis qhov kev them nqi pib cuam tshuam rau lub sijhawm ntev.
(2) Lub roj teeb txhuas-acid tsis txaus them rau lub sijhawm ntev.
(3) Tsis them nyiaj raws sijhawm tom qab tso tawm.
(4) Feem ntau overdischarge los yog me me tam sim no tob paug.
(5) Yog tias qhov nrawm nrawm yog qhov siab heev lossis qhov kub thiab txias dhau lawm, ua rau cov sulfate yuav ua rau muaj kev zoo thiab tsis yooj yim.
(6) Lub roj teeb txhuas-acid tau muab tso rau lub sijhawm ntev, thiab nws tsis siv rau lub sijhawm ntev yam tsis muaj kev them nyiaj li niaj zaus.