Daim Ntawv Qhia Tag Nrho rau SPD rau PV Systems thiab Solar Surge Protection
Kuv feem ntau ntxhov siab thaum kuv pom cov phiaj xwm hnub ci puas tsuaj los ntawm kev nthwv dej tam sim ntawd, yog li kuv vam khom rau ib qho Cov Khoom Siv Tiv Thaiv Surge kom txhua lub kaw lus ruaj khov.
Ib Cov Khoom Siv Tiv Thaiv Surge tiv thaiv cov kab ke PV los ntawm kev hloov cov hluav taws xob txaus ntshai ntawm cov vaj huam sib luag, cov inverters, thiab cov hluav taws xob circuits. Nws txo cov sijhawm tsis ua haujlwm, tiv thaiv cov khoom siv tsis ua haujlwm, thiab ua kom muaj kev nyab xeeb mus sij hawm ntev rau ob sab AC thiab DC ntawm lub hnub ci.
Hauv phau ntawv qhia no, kuv yuav coj koj mus txog txhua qhov ntawm kev tiv thaiv hluav taws xob los ntawm lub hnub ci kom koj tuaj yeem txiav txim siab txog kev siv tshuab rau txhua qhov project PV.
SPD yog dab tsi thiab vim li cas Solar PV Systems thiaj xav tau nws
Kuv tau pom cov tshuab PV ua tsis tiav vim muaj hluav taws xob ntau dhau uas tsis tau xav txog, yog li tam sim no kuv yeej tsis tsim ib qho project yam tsis muaj txoj cai Cov Khoom Siv Tiv Thaiv Surge nyob rau hauv qhov chaw.
Lub SPD hnub ci tiv thaiv cov kab ke PV los ntawm kev nqus lossis hloov cov xob laim, hloov cov teeb meem tam sim ntawd, thiab cov teeb meem hluav taws xob ua ntej lawv mus txog cov khoom rhiab heev. Nws pab tiv thaiv kev puas tsuaj ntawm inverter, txo cov nqi kho, thiab ua kom lub kaw lus ua haujlwm ruaj khov.
Cov chaw teeb tsa PV hnub ci ua haujlwm sab nraum zoov, yog li lawv ntsib kev pheej hmoo hluav taws xob tas li los ntawm xob laim, teeb meem ntawm lub grid, thiab kev hloov pauv. Vim tias cov vaj huam sib luag thiab cov inverters yog ua los ntawm semiconductor, lawv rhiab heev rau txawm tias me me overvoltage. Hauv kuv txoj haujlwm nrog ntau lub Hoobkas thiab cov tuam txhab EPC, kuv tau pom tias kev ua tsis tiav thaum ntxov yuav luag txhua zaus los ntawm kev raug hluav taws xob ntau dua li kev puas tsuaj ib txwm muaj. Yog vim li ntawd kuv thiaj kho kev tiv thaiv hluav taws xob ntau ua qhov yuav tsum tau tsim qauv tseem ceeb, tsis yog ib qho khoom siv xaiv tau.
Kev txhais ntawm SPD hauv Cov Hluav Taws Xob thiab Hnub Ci Systems
Ib lub SPD yog ib lub cuab yeej uas hloov qhov hluav taws xob dhau mus rau lub kaw lus av. Hauv cov kab ke PV, nws tiv thaiv cov hlua DC, cov inverters, cov thawv combiner, cov kab faib hluav taws xob AC, thiab cov kab sib txuas lus.
Cov Ua Rau Muaj Kev Nce Hluav Taws Xob Hauv PV Installations
Cov tshuab PV ntsib kev nce ntxiv los ntawm:
• xob laim (ncaj qha los yog raug ua kom xob laim)
• kev hloov pauv haujlwm
• kev cuam tshuam ntawm lub network hluav taws xob
• cov xov hlau ntev uas ua rau cov hluav taws xob hloov pauv sai dua
Vim Li Cas Kev Tiv Thaiv Surge Tseem Ceeb Rau Cov Vaj Huam Sib Luag Hnub Ci thiab Inverters
Cov vaj huam sib luag thiab cov inverters yooj yim puas tsuaj los ntawm cov hluav taws xob spikes. Thaum kuv mus xyuas cov chaw tsim khoom, feem ntau cov inverters puas tsuaj qhia cov cim qhia meej ntawm theem nkag. SPDs kom raug txo qhov kev pheej hmoo no.
Yuav Ua Li Cas MOV Technology Ua Haujlwm Sab Hauv Cov Khoom Siv Tiv Thaiv Surge
Kuv nco qab thawj zaug kuv qhib lub SPD uas tsis ua haujlwm; lub MOV block tau qhia tag nrho zaj dab neeg ntawm qhov system ntsib kev nce siab loj heev.
Cov thev naus laus zis MOV tso cai rau Cov Khoom Siv Tiv Thaiv Surge los tswj qhov hluav taws xob siab los ntawm kev hloov ntawm qhov tsis kam siab mus rau qhov tsis kam qis hauv microseconds. Nws nqus cov zog ntau dhau thiab xa nws mus rau hauv av kom muaj kev nyab xeeb ua ntej cov khoom siv raug puas tsuaj.
Lub MOV yog lub plawv ntawm feem ntau cov qauv SPD hauv kev lag luam. Kuv feem ntau piav qhia rau cov pab pawg yuav khoom tias qhov zoo ntawm MOV txiav txim siab qhov ruaj khov mus sij hawm ntev. Lub MOV tsis muaj zog txhais tau tias kev puas tsuaj thaum ntxov thiab cov qib kev tiv thaiv tsis tuaj yeem kwv yees tau. Yog vim li cas cov chaw tsim khoom uas xav tau kev ntseeg siab kev tiv thaiv hluav taws xob rau cov Hoobkas ib txwm sim tus cwj pwm MOV nyob rau hauv cov voj voog kev ntxhov siab rov ua dua ua ntej pom zoo rau tus neeg muag khoom.
MOV yog dab tsi thiab nws ua haujlwm li cas
Ib qho MOV (Metal Oxide Varistor) ua haujlwm zoo li lub resistor uas nyob ntawm qhov voltage. Thaum qhov voltage zoo li qub, nws thaiv cov tam sim no. Thaum qhov voltage nce siab tshaj qhov txwv, nws tam sim ntawd coj qhov surge mus rau hauv av.
Kev coj cwj pwm MOV thaum lub sijhawm muaj hluav taws xob ntau
Thaum lub sijhawm nce siab, qhov tsis kam ntawm MOV poob qis heev, ua rau muaj kev nyab xeeb rau cov hluav taws xob nce siab. Tom qab clamping, nws rov qab mus rau qhov tsis kam siab.
Cov Hom Kev Ua Tsis Tau Zoo ntawm MOV thiab Kev Xav Txog Kev Nyab Xeeb
Cov hom kev ua tsis tiav ntawm MOV feem ntau suav nrog kev kub dhau, hnav tawm, thiab thermal runaway. Yog vim li ntawd kuv thiaj li pom zoo kom siv cov thermal disconnection modules rau PV SPDs.
Cov Hom Phiaj Siv Tiv Thaiv Surge Protection Hauv Cov Tshuab Hnub Ci
Tom qab ntau xyoo ntawm kev tshuaj xyuas lub Hoobkas thiab cov haujlwm hnub ci, kuv tau kawm tias kev xaiv hom SPD kom raug txiav txim siab seb lub tshuab PV puas muaj sia nyob rau lub caij xob laim.
Hom 1, Hom 2, thiab Hom 3 SPDs muab ntau qib kev tiv thaiv tiv thaiv xob laim thiab kev hloov pauv hluav taws xob. Hom 1 tswj hwm xob laim ncaj qha, Hom 2 tswj hwm overvoltage, thiab Hom 3 tiv thaiv cov khoom siv kawg thiab cov khoom siv hluav taws xob rhiab heev.
Ntau pab pawg neeg yuav khoom tsom mus rau qhov sib txawv ntawm tus nqi ntawm cov hom SPD, tab sis kuv ib txwm piav qhia tias txhua hom ua lub luag haujlwm sib txawv. Lub kaw lus ua haujlwm zoo tshaj plaws thaum lawv sib koom ua ke ua cov saw hlau tiv thaiv tag nrho. Cov tuam txhab EPC hnub ci uas hla ib hom feem ntau ntsib kev ua tsis tiav ntawm inverter thaum muaj cua daj cua dub. Hauv qab no yog kev sib piv sai:
Rooj 1 - Hom SPD thiab Lawv Cov Haujlwm
| Hom SPD | Kev Tiv Thaiv Tseem Ceeb | Qhov Chaw Ib Txwm Muaj | Qib Siab |
|---|---|---|---|
| Hom 1 | xob laim tam sim no | Vaj huam sib luag AC tseem ceeb | Siab heev |
| Hom 2 | Hluav taws xob ntau dhau | Inverter DC/AC cov tswv yim | Nruab Nrab |
| Hom 3 | Cov khoom siv davhlau ya nyob twg | Cov vaj huam sib luag tswj | Qis |
Hom 1 SPD rau Kev Tiv Thaiv Xob laim
Siv rau ntawm qhov rooj nkag kev pabcuam los tso tawm cov hluav taws xob loj.
Hom 2 SPD rau Kev Tiv Thaiv Overvoltage
Nruab ze ntawm cov inverters los tiv thaiv kev hloov pauv thiab kev nce siab.
Hom 3 SPD rau Kev Tiv Thaiv Cov Khoom Siv Terminal
Siv rau hauv cov voj voog tswj kev rhiab heev.
Xaiv SPD zoo rau PV Daim Ntawv Thov
Kuv ib txwm phim hom SPD rau qib xob laim, qhov hluav taws xob teeb tsa, qhov rhiab heev ntawm cov khoom siv, thiab cov xwm txheej hauv av.
Daim Ntawv Qhia Txog Kev Teeb tsa SPD rau PV Panels thiab Inverters
Kuv tau pom ntau qhov project ua tsis tiav vim tias SPD tau teeb tsa rau qhov chaw tsis raug, txawm tias lub cuab yeej nws tus kheej zoo.
Cov SPDs yuav tsum tau teeb tsa ze rau cov khoom siv tiv thaiv, nrog rau cov xov hlau luv luv, polarity raug, grounding raug, thiab hom SPD raug rau ob sab AC thiab DC ntawm lub PV system.
Kev teeb tsa kom raug tseem ceeb dua li lub npe lag luam. Txawm tias lub SPD kev lag luam zoo tshaj plaws los kuj tsis ua haujlwm yog tias txoj hlua ntev dhau. Kuv feem ntau qhia cov kws kho tshuab tias txoj hlua ntxiv 20-cm tuaj yeem ua rau lub zog seem ob npaug, uas tuaj yeem ua puas lub inverter input board.
Qhov twg yuav tsum tau nruab SPD hauv lub PV System
Cov SPDs yuav tsum muab tso rau ntawm DC combiner thawv, inverter DC inputs, inverter AC outputs, thiab lub ntsiab AC faib tawm.
Cov Kauj Ruam Txhim Kho DC Sab SPD
• txuas rau txhua txoj hlua nkag
• xyuas kom meej tias qhov polarity sib phim
• khaws cov xov hlau kom ntev dua 0.5 m
Cov Kauj Ruam Txhim Kho AC Sab SPD
• nruab ze ntawm cov qhov tso zis ntawm lub inverter
• txuas rau hauv av PE
• ua raws li cov cai ntawm TN/TT system wiring
Cov Yuam Kev Txhim Kho Feem Ntau Yuav Tsum Tsis Txhob Ua
Qhov yuam kev loj tshaj plaws suav nrog cov xov hlau ntev, tsis muaj av, hom SPD tsis raug, thiab qhov ntsuas hluav taws xob tsis raug.
Cov Kev Cai Tiv Thaiv Surge DC thiab AC rau Lub Hnub Ci
Kuv feem ntau xyuas cov chaw PV uas qhov ntsuas SPD tsis phim qhov hluav taws xob qhib ntawm lub array, uas ua rau muaj kev pheej hmoo zais rau tag nrho lub kaw lus.
Cov PV SPDs yuav tsum phim qhov ntsuas hluav taws xob DC, qhov ntsuas hluav taws xob AC, lub kaw lus av, cov cai sib koom tes, thiab pawg teeb tsa kom ntseeg tau tias muaj kev tiv thaiv ruaj khov thoob plaws tag nrho lub kaw lus PV.
Hauv qab no yog daim ntawv sib piv qhov ntsuas uas ntau pab pawg neeg yuav khoom pom tias muaj txiaj ntsig:
Rooj 2 - Cov Kev Cai Ntsuas SPD rau Kev Teeb tsa PV
| Cov Qauv | DC Sab | AC Sab |
|---|---|---|
| Kev Ntsuas Hluav Taws Xob | Cov Lus Qhia × 1.2 | 230/400V feem ntau |
| Qhov Ntsuas Tam Sim No | 20–40kA | 20–65kA |
| Hom | Hom 2 | Hom 1/2 |
Kev Ntsuas Hluav Taws Xob thiab Tam Sim No rau PV SPD
Ib txwm phim SPD's Ucpv nrog qhov siab tshaj plaws Voc ntawm array thaum txias.
Cov Kev Xav Tau Rau Av Thiab Av
Kev sib txuas av zoo yuav txo tau lub zog hluav taws xob ntau heev. Kuv ib txwm xyuas qhov tsis kam ntawm kev sib txuas av ua ntej kev teeb tsa SPD.
Kev Sib Koom Tes SPD Ntawm Sab AC thiab DC
Siv Hom 1 ntawm lub vaj huam sib luag AC tseem ceeb thiab Hom 2 ze ntawm lub inverter rau kev sib koom tes zoo.
SPD vs Surge Arrester: Qhov Sib Txawv Tseem Ceeb rau PV Kev Tiv Thaiv
Muaj ntau tus neeg yuav khoom nug kuv seb lawv puas yuav tsum siv SPD lossis lub tshuab ntes hluav taws xob, thiab kuv cov lus teb yeej ib txwm yog: lawv ua haujlwm sib txawv.
Ib lub cuab yeej tiv thaiv hluav taws xob loj (surge arresters) yuav siv tau los tswj cov teeb meem xob laim loj sab nraud, thaum lub SPD tiv thaiv cov khoom siv los ntawm ob qho tib si hluav taws xob sab nraud thiab sab hauv. Feem ntau cov tshuab PV tau txais txiaj ntsig los ntawm kev siv ob qho tib si.
Rooj 3 - SPD vs Surge Arrester
| Feature | SPD | Cov Khoom Siv Tiv Thaiv Surge |
|---|---|---|
| Kev Tiv Thaiv | Sab hauv + sab nraud surges | Feem ntau yog xob laim |
| Ceev | Sai dua | Qis dua |
| Siv PV | Cov inverters, cov hlua DC | Qhov rooj nkag mus rau kev pabcuam |
Cov Khoom Siv Surge Arresters Ua Haujlwm Li Cas vs SPDs
Cov cuab yeej tiv thaiv hluav taws xob loj tso tawm lub zog xob laim loj tab sis teb qeeb dua li SPDs.
Qhov Twg Zoo Dua Rau Kev Tiv Thaiv Hluav Taws Xob PV
SPDs tiv thaiv cov khoom siv hluav taws xob zoo dua, thaum cov neeg ntes tiv thaiv cov qauv tsev.
Thaum Twg Yuav Siv Ob Leeg Hauv Kev Teeb Tsa Hnub Ci
Kuv ib txwm siv ob qho tib si rau cov haujlwm PV loj lossis muaj kev pheej hmoo siab.
Xaus lus
Siv ib qho khoom siv zoo heev Cov Khoom Siv Tiv Thaiv Surge kom txhua lub hnub ci PV system muaj kev nyab xeeb, ruaj khov, thiab npaj txhij rau kev ua haujlwm mus sij hawm ntev.
Cov Lus Nug Feem Ntau Txog SPD, MOV, thiab Kev Tiv Thaiv Xob laim rau Lub Hnub Ci
Kuv puas siv tau ob lub SPDs hauv series?
Yog, tsuav yog ua raws li cov cai sib koom tes.
Cov Vaj Huam Sib Luag Hnub Ci Puas Xav Tau AC lossis DC SPD?
Ob sab AC thiab DC xav tau kev tiv thaiv.
Lub SPD kav ntev npaum li cas?
Feem ntau 5-10 xyoo nyob ntawm qhov kev raug hluav taws xob.
Yuav ua li cas thaum SPD tsis ua haujlwm?
Nws txiav tawm sab hauv kom tsis txhob muaj kev pheej hmoo hluav taws.