Nrog rau kev loj hlob sai ntawm hnub ci photovoltaic (PV) lub zog tsim hluav taws xob, HVDC tsim tau nce siv hauv cov ru tsev, cov chaw tsim hluav taws xob thiab kev lag luam / kev lag luam. Lub fuse yog ib feem tseem ceeb ntawm kev nyab xeeb kev nyab xeeb ntawm PV systems. Nws lub luag haujlwm tseem ceeb yog cuam tshuam lub Circuit Court sai thaum muaj overcurrent lossis luv luv -circuit faults, thiaj li tiv thaiv cov khoom puas thiab teeb meem kev nyab xeeb. Txawm li cas los xij, qee cov neeg siv yuam kev ntseeg tias tus qauv AC fuses - uas pheej yig dua - tuaj yeem siv los ua lwm txoj hauv kev tshwj xeeb fuses rau cov cell photovoltaic. Hauv kev xyaum, qhov no ua rau muaj kev nyab xeeb tseem ceeb thiab tuaj yeem ua rau muaj kev tiv thaiv tsis ua haujlwm, cov cuab yeej puas tsuaj thiab txawm tias hluav taws kub.
Yog li vim li cas ho tsis hloov PV fuses nrog cov qauv hloov tam sim no? Nyob rau hauv daim ntawv no, lub hauv paus ntsiab lus ntawm kev ua hauj lwm, cov kev xav tau ntawm kev ua tau zoo thiab cov qauv muaj feem xyuam yuav raug txheeb xyuas kom meej.
PV system siv DC
PV sib dhos ua cov khoom siv tam sim no; Tam sim no nyob twj ywm DC thoob plaws hauv lub voj voog - los ntawm cov hlua sib dhos thiab kev sib txuas ntawm chassis mus rau qib nkag ntawm lub inverter.
Hloov chaw, tus qauv AC fuses yog tsim los rau AC faib tshuab raws li cov yam ntxwv ntawm hluav taws xob tam sim no (AC.
Ib qho ntawm cov yam ntxwv tseem ceeb ntawm AC yog qhov hloov pauv ntawm qhov tam sim no, uas dhau los ntawm "zero" ob peb zaug hauv ib ob. Ntawm 50Hz, piv txwv li, tam sim no tuaj yeem tshaj 100 zaug hauv ib ob. Thaum lub Circuit Court fused, thaum tam sim no dhau los ntawm xoom, lub arc raug tua lawm, yog li lub arc extinguishing mechanism hauv AC fuse yog qhov yooj yim.
Los ntawm qhov sib txawv, DC tsis muaj qhov xoom xoom- taw tes kev sib tshuam thiab cov kev taw qhia tam sim no tseem zoo ib yam. Thaum lub sij hawm luv luv, lub arc yuav nyob twj ywm, uas yuav tsum tau lub fuse kom tso siab rau ib tug tshwj xeeb arc extinguishing qauv kom sai txiav tam sim no. Yog li ntawd, PV system yuav tsum muaj fuse
tsim tshwj xeeb rau cov ntawv thov DC.
DC arc yog ib qho nyuaj rau tua tshaj AC arc
Qhov no yog qhov laj thawj tseem ceeb vim li cas tus qauv AC fuses tsis tuaj yeem hloov photovoltaic fuses.
Thaum cov khoom siv sab hauv ntawm lub fuse yaj, qhov siab -kub arc tsim ntawm ob qhov kawg. Thaum lub sij hawm AC, lub arc tuaj yeem raug tua ib txwm muaj raws li qhov tam sim no pheej rov qab mus rau xoom.
Txawm li cas los xij, lub arc tseem muaj nyob rau hauv DC system, uas tuaj yeem ncav cuag qhov kub ntawm ntau txhiab degrees Celsius thiab txuas ntxiv tso cua sov ntau. Yog tias lub fuse tsis muaj peev xwm tua hluav taws txaus, cov teeb meem hauv qab no yuav tshwm sim:
Lub arc tseem kub hnyiab, tiv thaiv Circuit Court los ntawm kev cuam tshuam tiag tiag.
Fuses implode lossis txawm tawg;
Ib puag ncig cov ntaub ntawv rwb thaiv tsev kub hnyiab;
Hluav taws xob lub thawv sib txuas lossis lub hwj chim faib txee;
Cov khoom siv xws li inverters thiab PV cov khoom puas lawm.
Yog li ntawd, PV fuses feem ntau yog quenched nrog quartz xuab zeb, siab zog ceramic plhaub, thiab cov qauv ntawm lub fuse yog optimized los xyuas kom meej ceev thiab nyab xeeb extinguishing ntawm DC arc.
Photovoltaic fuses muaj qhov ntsuas hluav taws xob siab DC.
Feem ntau voltage theem rau PV systems muaj xws li:
600V DC fais fab mov
1000V DC fais fab mov
1500V DC fais fab mov
Hauv qhov sib piv, qhov ntsuas hluav taws xob ntawm tus qauv AC fuse feem ntau yog:
250V AC ua
400V AC
500V AC ua
690V AC ua
Nws yog ib qho tseem ceeb uas yuav tsum nco ntsoov tias AC voltage ntsuas tsis ncaj nraim rau DC qhov ntsuas hluav taws xob.
Piv txwv li, AC fuse nrog qhov ntsuas tam sim no ntawm 690V tuaj yeem tiv taus tsuas yog 250V txog 400V ntawm DC. Yog tias nruab rau hauv 1000V lossis 1500V PV system, lub fuse yuav tsis muaj kev tiv thaiv, vim tias lub fuse tsis tuaj yeem cuam tshuam qhov siab -voltage DC arc txawm tias lub fuse nws tus kheej melts.
Yog li, PV system yuav tsum muaj lub fuse tshwj xeeb uas tsim los rau PV daim ntawv thov, thiab nws qhov kev ntsuas hluav taws xob DC yuav tsum ua kom tau raws li qhov yuav tsum tau ua.
Cov yam ntxwv tiv thaiv ntawm photovoltaic fuses zoo dua rau lub hnub ci zog.
Hnub ci arrays muaj cov yam ntxwv tso zis tshwj xeeb.
Piv txwv li:
Tam sim no fluctuates tsis tu ncua nrog hnub ci irradiance.
Cov zis tam sim no txawv thaum sawv ntxov / yav tsaus ntuj, huab cua thiab hnub ci hnub ci;
Thaum muaj ntau txoj hlua sib npaug, qhov rov qab tuaj yeem tshwm sim;
Fault tam sim no yuav kav ntev dua.
Lub sij hawm - cov yam ntxwv ntws ntawm PV fuses yog tsim tshwj xeeb rau cov haujlwm no; lawv tuaj yeem tiv taus qhov hloov pauv tam sim no thaum lub sijhawm ua haujlwm ib txwm muaj thaum teb sai sai thaum tsis ua haujlwm.
Standard AC fuses yog tsim los rau AC loads thiab tsis ua hauj lwm zoo nyob rau hauv PV DC systems, ua rau muaj ob yam teeb meem:
Tripping (tshuab) kev sib tsoo thaum lub sijhawm ua haujlwm;
Cov lus teb qeeb lossis tsis muaj peev xwm ua haujlwm thaum lub sijhawm ua haujlwm tsis zoo.
Ob qho xwm txheej no tuaj yeem cuam tshuam rau kev ua haujlwm ruaj khov ntawm PV systems. PV fuzes raws li Cov Qauv Tshwj Xeeb International
Fuzes tshwj xeeb uas tsim los rau kev siv photovoltaic yuav tsum ua raws li cov qauv thoob ntiaj teb, xws li:
IEC 60269-6 (Tsawg-voltage fuses-Fuses tiv thaiv hnub ci photovoltaic systems)
UL 248-19 Txheem rau Photovoltaic Fuses
Cov qauv no muab cov kev cai nruj rau DC breakability, kub nce, durability, arc extinguishing kev ua tau zoo thiab kev ntseeg tau.
Hauv qhov sib piv, tus qauv AC fuses tau tsim raws li AC cov qauv kev faib khoom thiab tseem tsis tau raug lees paub los ntawm qhov chaw ua haujlwm ntawm PV systems thiab yog li tsis ua raws li qhov yuav tsum tau muaj kev nyab xeeb ntawm PV system.
Kev pheej hmoo ntawm kev siv tus qauv AC fuses
Hloov photovoltaic fuses nrog tus qauv AC fuses kom txo cov nqi yuav ua rau muaj kev pheej hmoo hauv qab no:
DC txhaum tam sim no tsis tuaj yeem cuam tshuam;
Txuas ntxiv arc ntawm hluav taws xob, ua rau fuse puas;
Kub kub kub hauv lub thawv ua ke;
Overcurrent stress ntawm PV Cheebtsam thiab inverters;
Ntxiv qhov system downtime thiab tu nqi;
Hnyav thiab tsis tshua muaj hluav taws xob loj hluav taws xob zais kev phom sij, ua rau muaj kev phom sij rau tib neeg thiab kev nyab xeeb ntawm vaj tse.
Xav txog tag nrho cov peev txheej hauv PV systems, tus nqi ntawm fuses yog qhov tsis txaus ntseeg, tab sis lawv ua lub luag haujlwm tseem ceeb hauv kev tiv thaiv kev nyab xeeb. Xaiv cov khoom tsis raug kom txuag tau tus nqi me me ntawm kev yuav khoom feem ntau ua rau kev poob nyiaj txiag loj dua.
Yuav ua li cas xaiv PV Fuses kom raug?
Txhawm rau kom muaj kev nyab xeeb thiab txhim khu kev lag luam ntawm PV system, cov hauv qab no yuav tsum tau muab qhov tseem ceeb hauv kev xaiv:
Rated voltage: yuav tsum tsis txhob qis dua qhov siab tshaj plaws DC voltage ntawm qhov system (xws li, 1000V DC lossis 1500V DC).
Rated tam sim no: Raws li luv luv Circuit Court tam sim no (Isc), tus naj npawb ntawm cov kab sib txuas thiab tsim cov npoo ntawm lub rooj sib txoos photovoltaic.
Crushing muaj peev xwm: Qhov yuav tsum tau muaj qhov siab tshaj plaws muaj peev xwm tam sim no hauv qhov system yuav tsum tau ua tiav.
Cov qauv kev lees paub: Ua ntej cov khoom lag luam uas tau ntsib thiab tau lees paub rau IEC 60269-6, 248-19, thiab lwm yam.
Environmental Adaptability: Xav txog tej yam kev thov xws li kub / qis, av noo, ntsev pos huab, thiab lwm yam., thiab xaiv cov khoom uas yog huab cua- tiv taus. Xaus:
Txawm hais tias photovoltaic (PV) fuses zoo ib yam li cov qauv AC fuses, muaj qhov sib txawv hauv cov qauv tsim, kev siv ib puag ncig thiab kev ua haujlwm. Vim tias PV system ua haujlwm nyob rau hauv high voltage DC tam sim no, cov kev cai ntawm DC arc fireextinguishing muaj peev xwm, fragmentation peev xwm, rated voltage, thiab lwm yam yog nruj. Standard AC fuses tsis ua raws li cov cai no, thiab kev siv cov qauv AC fuses tsis tsuas yog tsis muaj kev tiv thaiv zoo, tab sis kuj ua rau muaj kev phom sij loj.
Thaum lub sijhawm tsim kho, kev ua haujlwm thiab kev saib xyuas ntawm PV fais fab nroj tsuag, tshwj xeeb fuses rau photovoltaic (PV) yuav tsum raug xaiv raws li cov qauv tsim nyog thiab raws li qhov voltage, tam sim no thiab kev ua haujlwm ntawm lub kaw lus. Tsuas yog los ntawm kev siv cov cuab yeej tiv thaiv kom raug tuaj yeem ua rau PV system ua haujlwm ruaj ntseg thiab ruaj khov rau lub sijhawm ntev.
Cov lus nug nquag
1.Photovoltaic fuses zoo ib yam li tus qauv AC fuses. Nws puas yog interchangeable?
Tsis yog. Txawm hais tias qee cov khoom lag luam yuav muaj qhov sib xws ntawm lub cev, lawv muaj cov qauv sab hauv sib txawv, cov qauv tsim thiab kev ua haujlwm tsis zoo; koj tsis tuaj yeem pauv lawv tsuas yog vim lawv zoo sib xws.
2.Vim li cas DC systems nyuaj los tiv thaiv dua li AC systems?
Qhov tsis muaj ib qho chaw zero ntawm DC dhau los txhais tau hais tias lub arc tsim thaum lub sij hawm tsis ua hauj lwm yuav txuas ntxiv hlawv; Yog li ntawd, tshwj xeeb DC tiv thaiv cov ntsiab lus nrog cov qib siab arc extinguishing muaj peev xwm yuav tsum tau.
