Feem ntau hais lus, hluav taws xob tsim los ntawm photovoltaic systems yog qhov tseem ceeb rau kev siv los ntawm kev thauj khoom. Thaum lub tshuab hluav taws xob photovoltaic tshaj qhov kev siv hluav taws xob, yuav muaj hluav taws xob rov qab los rau hauv daim phiaj, hu ua "rov qab tam sim no". Daim phiaj hluav taws xob muaj cov kev cai nruj ntawm daim phiaj kev sib txuas ntawm kev tsim hluav taws xob photovoltaic, thiab tsis tau tso cai rov qab fais fab kev sib txuas yuav raug nplua. Lub caij no, rau cov haujlwm photovoltaic uas tsis tas yuav siv internet, kev tiv thaiv kev tiv thaiv rov qab yog tus yuam sij rau kev ua tiav tus kheej txaus hauv lub zog ntsuab.
Yog li dab tsi yog anti backflow? Nws txoj hauv kev ua haujlwm thiab kev daws teeb meem yog dab tsi?
1. Kev tiv thaiv rov qab yog dab tsi?
Nyob rau hauv ib tug photovoltaic system, qhov tso zis ntawm DC hluav taws xob los ntawm photovoltaic modules yog hloov mus rau hauv AC hluav taws xob los ntawm ib tug inverter siv los ntawm lub load; Thaum lub zog tsim hluav taws xob ntawm lub tshuab hluav taws xob photovoltaic ntau dua lub zog thauj khoom, vim qhov tsis muaj peev xwm ntawm cov khoom thauj mus rau tag nrho cov hluav taws xob tsim los ntawm photovoltaic, cov hluav taws xob ntau dhau yuav ntws mus rau hauv daim phiaj nyob rau hauv qhov sib txawv, ua rau "rov qab ntws. ". Lub tshuab hluav taws xob photovoltaic nrog kev ua haujlwm rov qab tuaj yeem txo qhov tso zis hluav taws xob ntawm lub inverter raws sijhawm thaum lub zog tsim hluav taws xob ntau tshaj lub zog thauj khoom, txhawm rau txo cov hluav taws xob tag nrho ntawm qhov system, xyuas kom meej tias cov hluav taws xob tsim los ntawm photovoltaic tsuas yog siv los ntawm cov khoom siv hluav taws xob. load, thiab zam dhau hluav taws xob ntws mus rau hauv daim phiaj.
2. Vim li cas nws thiaj li yuav tsum tau teeb tsa kev ntsuas kev tiv thaiv rov qab?
Feem ntau hais lus, muaj ntau qhov laj thawj vim li cas nws thiaj li tsim nyog rau nruab anti backflow:
① Cov cai txwv tsis pub muaj zog.Vim yog txoj cai thiab nqa peev xwm ntawm daim phiaj hluav taws xob, some cheeb tsam tsis raug tso cai txuas rau kab sib chaws. Tsis muaj kev tso cai rov qab fais fab kev sib txuas yuav raug nplua;
② Daim phiaj txuas hluav taws xob txwv.Daim phiaj hluav taws xob muaj kev txwv nruj ntawm daim phiaj hluav taws xob txuas nrog. Yog tias qhov hluav taws xob ntau dhau raug txhaj ncaj qha yam tsis muaj kev tswj hwm, nws yuav muaj kev cuam tshuam rau hauv daim phiaj hluav taws xob;
③ Lub hauv paus ntsiab lus ntawm kev siv tus kheej thiab tsis txuas hluav taws xob ntxiv rau hauv internet.Lub tshuab hluav taws xob photovoltaic yuav tsum tau ua kom ntseeg tau tias cov hluav taws xob tsim tau zoo dua rau cov khoom thauj hauv zos. Yog tias cov khoom thauj hauv zos tsis tuaj yeem noj tau, cov khoom siv tiv thaiv rov qab yuav tsum tau siv los tiv thaiv cov hluav taws xob ntau dhau los ntawm kev ntws rov qab mus rau daim phiaj.
3. Lub hauv paus ntsiab lus ua haujlwm ntawm kev tiv thaiv rov qab
Hauv kev siv cov tswv yim, lub zog ntawm lub sijhawm tiag tiag, qhov loj ntawm tam sim no, thiab cov kev taw qhia ntawm cov kab yog tau los ntawm kev txhim kho cov khoom siv hluav taws xob tiv thaiv rov qab thiab CT transformer ntawm cov tsheb thauj mus los ntawm tsev neeg. Thaum pom tias tam sim no ntws mus rau hauv daim phiaj (rov qab tam sim no), anti backflow meter xa cov ntaub ntawv rov qab fais fab mus rau inverter los ntawm kev sib txuas lus RS485. Lub inverter teb nyob rau hauv vib nas this tom qab tau txais cov lus txib, txo cov zis hluav taws xob ntawm lub inverter thiab ua kom cov tam sim no ntws los ntawm photovoltaic fais fab chaw nres tsheb mus rau kab sib chaws ze rau 0, yog li ua tiav los tiv thaiv backflow thiab tsis xa hluav taws xob ntau dhau mus rau daim phiaj. .
4. Anti backflow tov
Nco ntsoov ua tib zoo saib xyuas cov ntawv thov kev siv hluav taws xob hauv cov phiaj xwm photovoltaic, thiab muab cov cuab yeej sib txawv xws li photovoltaic inverters, anti backflow meters, thiab cov thawv tiv thaiv rov qab los tsim cov tshuaj tiv thaiv rov qab tsim nyog rau cov xwm txheej sib txawv.
(1) Kev daws rau Tib theem Anti backflow System
Cov khoom siv yuav tsum tau:photovoltaic daim phiaj txuas inverter, anti backflow meter, kev sib txuas lus ntawm meter thiab inverter. Cov tswv yim no tsim nyog rau cov xwm txheej hauv tsev photovoltaic nkaus xwb.
(2) Kev daws rau ib lub tshuab peb-theem anti backflow system
Rau cov tsev neeg uas tsis tshua muaj hluav taws xob sib txuas nrog inverters, DC anti backflow meter tuaj yeem siv ncaj qha. Lub AC tso zis davhlau ya nyob twg ntawm lub inverter yog txuas ncaj qha mus rau lub 'meter' thiab ces txuas nrog rau daim phiaj kev twb kev txuas taw tes mus cuag anti backflow; Rau high-power grid txuas inverters, nws yog ib qho tsim nyog los xyuas qhov tam sim no ntawm daim phiaj kev sib txuas tsheb npav los ntawm CT transformers, proportionally txo qhov tam sim no los ntawm transformers, thiab txuas mus rau anti backflow meters kom ua tiav tam sim no thiab lub zog ntsuas ntawm daim phiaj kev sib txuas.
(3) Multi tshuab anti backflow system daws
Ntau lub inverters txuas nrog hauv series los ntawm kev sib txuas lus sib txuas rau cov ntaub ntawv sau, haum rau ntau hom tshuab, nrog rau kev ua haujlwm muaj zog dua thiab muaj peev xwm loj dua.
Cov ntsiab lus
Cov tshuaj tiv thaiv rov qab tuaj yeem ua tau raws li txoj cai ntawm "kev sib txuas kab sib txuas yam tsis muaj kev tawm tswv yim" hauv qee thaj tsam. Tsis tas li ntawd, kev tiv thaiv rov qab tuaj yeem txhim kho kev lag luam, txhim kho kev siv hluav taws xob zoo, thiab hloov mus rau kev txhim kho thev naus laus zis thiab kev hloov pauv txoj cai thaum ua kom ruaj khov ntawm cov phiaj xwm hluav taws xob thiab txhim kho kev nyab xeeb.