1. Ua ntej, nkag siab tias yog vim li cas photovoltaic system malfunctioning
Ntau qhov kev pheej hmoo ntawm qhov ntev - lub sij hawm raug ntawm Photovoltaic modules rau sab nraum zoov:
Cov nyhuv kub kub: Thaum lub xov tooj ntawm tes raug cuam tshuam, puas lossis kev laus, nws tsis tsim hluav taws xob ntxiv lawm tab sis dhau los ua tus tiv thaiv, siv hluav taws xob tsim los ntawm lwm lub hlwb. Cov kub hauv cheeb tsam tuaj yeem nce mus rau ntau pua degrees Celsius, txaus los hlawv cov vaj huam sib luag rov qab thiab txawm tias hluav taws kub.
Hlau nyob rau hauv luv luv Circuit Court: cable rwb thaiv tsev laus, seam dej ingress, connector virtual kev twb kev txuas, thiab lwm yam., tuaj yeem ua rau luv luv Circuit Court, tam sim ntawd tsim ntau kaum ntawm lub sij hawm ib txwm ua hauj lwm tam sim no txhaum tam sim no.
Rov qab tam sim no: Thaum ib txoj hlua nres vim qhov txhaum, qhov tam sim no ntawm lwm cov hlua ib txwm rov qab los ntawm txoj hlua txhaum, ua rau muaj kev puas tsuaj thib ob.
Cov khoom siv hluav taws xob semiconductor xws li IGBT hauv inverters yog qhov zoo heev. Thaum DC sab tam sim no tsis muaj kev tswj hwm, nws yuav raug puas tsuaj mus tas li hauv milliseconds thiab tag nrho cov inverter yuav raug tso tseg.
Tag nrho lub luag haujlwm ntawm lub tshuab hluav taws xob photovoltaic yog txiav tawm tag nrho lub voj voog hauv thawj milliseconds tom qab muaj kev puas tsuaj.
2. Kev tiv thaiv mechanism rau photovoltaic Cheebtsam
Kev tiv thaiv 1: cais qhov kub ntawm qhov kub.
Thaum ib lub roj teeb tshwj xeeb ntsib qhov chaw kub, qhov txhaum tam sim no nce nrawm nrawm ntawm txoj hlua hluav taws xob. Thaum qhov tam sim no tshaj qhov pib pib, lub fuse melts sai sai, cais tag nrho cov faulty kab ntawm lub system. Lwm cov hlua ib txwm tsis cuam tshuam thiab txuas ntxiv ua hluav taws xob. Thaum tsis muaj fuse, qhov tsis tu ncua siab tam sim no tsim los ntawm qhov chaw tshav kub yuav mus raws cov kab hluav taws xob, tsis tsuas yog hlawv cov khoom tsis zoo tab sis kuj muaj feem cuam tshuam rau cov khoom nyob ib sab.
Kev tiv thaiv 2: Txiav luv-circuit tam sim no los tiv thaiv cable los ntawm hluav taws.
Thaum ib qho luv luv Circuit Court tshwm sim, luv luv - Circuit Court tam sim no tuaj yeem ncav cuag ntau dua 10 npaug ntawm qhov ua haujlwm tam sim no. Yog hais tias lub fuse tsis raug txiav nyob rau hauv lub sij hawm, lub cable yuav overheat, lub rwb thaiv tsev yuav yaj thiab txawm ignite cov khoom nyob ib ncig ntawm lub sij hawm luv luv. Lub millisecond teb ntawm lub fuse tuaj yeem tiv thaiv qhov hluav taws kub ntawm qhov chaw los ntawm kev txiav tawm hauv Circuit Court ua ntej qhov kub ntawm cable nce mus rau qhov txaus ntshai.
Kev Tiv Thaiv 3: Tiv thaiv reflux.
Thaum ib txoj hlua raug txiav tawm ntawm lub network los ntawm lub fuse, tam sim no ntawm lwm cov hlua ib txwm yuav tsis ntws rov qab mus rau ceg hauv nqe lus nug. Qhov no zoo nkaus li yog "kev cuam tshuam" ntawm fuses, tab sis qhov tseeb yog ib qho tseem ceeb heev ntawm kev tiv thaiv - nws ua kom ntseeg tau tias qhov ua txhaum raug khaws cia rau qhov tsawg kawg nkaus thiab tsis txhob nthuav dav lossis nthuav dav.
3. Kev tiv thaiv mechanism ntawm inverter
Kev Tiv Thaiv 1: Ua haujlwm raws li 'kab kawg ntawm kev tiv thaiv' rau inverters.
Txawm hais tias lub inverter nws tus kheej muaj kev ua haujlwm ntawm kev tiv thaiv dej, nws cov lus teb ceev thiab kev muaj peev xwm tawg tau txwv. Thaum muaj qhov luv luv luv tshwm sim ntawm DC sab, qhov txhaum tam sim no tau nce sai thiab tej zaum yuav tau hlawv tawm ntawm IGBT ua ntej lub inverter qhov hluav taws xob tiv thaiv Circuit Court qhib. Lub cev ntshiab lub cev yaj lub tshuab inverter tsis nyob ntawm ib qho hluav taws xob teeb liab, muaj cov lus teb ceev ceev thiab muaj peev xwm tawg, thiab yog ib qho khoom siv tsis tuaj yeem hloov tau - qib tiv thaiv rau inverter DC input davhlau ya nyob twg.
Kev tiv thaiv 2: txwv tsis pub muaj zog thiab txo kev puas tsuaj.
Txawm nyob rau hauv qhov kev tshwm sim ntawm ib tug txhaum, lub ceev ceev fuse ntawm lub fuse tuaj yeem ua rau luv luv lub sijhawm ntawm qhov txhaum tam sim no. Lub sijhawm luv luv ntawm lub sijhawm tam sim no, lub zog tsawg dua raug tso tawm rau lub inverter, thiab qhov cuam tshuam tsawg dua ntawm cov cuab yeej hluav taws xob. Feem ntau, nws yog vim hais tias lub fuse txiav Circuit Court nyob rau hauv milliseconds uas lub inverter muaj peev xwm "siv" los ntawm tsuas yog hloov lub fuse kom rov qab mus ua hauj lwm, es tsis txhob hloov tag nrho cov cuab yeej.
Kev Tiv Thaiv 3: Ua tiav qhov kev sib cais ntawm cov ceg txhaum cai kom ntseeg tau tias kev ua haujlwm tag nrho
Nyob rau hauv ib qho system uas muaj ntau cov hlua txuas mus rau tib lub inverter, yog tias ib txoj hlua tsis ua haujlwm tsis muaj fuse, DC cov tswv yim ntawm tag nrho cov inverter raug cuam tshuam, uas tuaj yeem ua rau muaj kev tiv thaiv kaw ntawm lub inverter thiab ua rau txhua txoj hlua tsis muaj hluav taws xob. Nrog cascading fuses, tsuas yog cov ceg faulty raug txiav tawm thiab cov seem ib txwm txuas ntxiv muab cov inverter, txo qhov poob ntawm lub zog tsim hluav taws xob.
4, Ua tiav cov saw hlau ntawm kev tiv thaiv fuse
Nyob rau hauv qhov kev tshwm sim ntawm malfunction, tag nrho cov txheej txheem tiv thaiv yog raws li nram no:
Thawj yog tam sim no anomaly tshwm sim los ntawm luv luv Circuit Court, kub qhov chaw backflow, overload, thiab lwm yam.
Qhov thib ob kauj ruam yog ua kom cov tam sim no sai heev, thiab thaum lub tam sim no mus txog lub rated tam sim no ntawm lub fuse, sab hauv ntawm cov yaj pib kub thiab yaj.
Qhov thib peb kauj ruam yog yaj lub yaj tag, txiav tawm Circuit Court nyob rau hauv milliseconds mus rau kaum milliseconds.
Kauj ruam 4, rov pib dua qhov txhaum tam sim no rau xoom thiab tshem tawm tag nrho cov khoom, cables, thiab inverters los ntawm kev txaus ntshai.
Kauj Ruam 5, cov neeg ua haujlwm thiab cov neeg ua haujlwm saib xyuas nrhiav thiab hloov lub fuse kom rov ua haujlwm ntawm lub cev.
Cov txheej txheem yuav tsum tsis muaj hluav taws xob sab nraud, tsis muaj kev ywj pheej ntawm kev tswj cov cim, tsis cuam tshuam los ntawm ib qho software logic, thiab yog txoj kev tiv thaiv zoo tshaj plaws thiab txhim khu kev qha.
5, Vim li cas ho tsis tuaj yeem fuses hloov tag nrho nrog kev tiv thaiv hluav taws xob?
Muaj coob tus yuav nug: Puas yog lub inverter twb tsis muaj hluav taws xob overcurrent tiv thaiv? Vim li cas peb thiaj xav tau fuses?
Yog vim li cas yog tias kev tiv thaiv hluav taws xob yog ib hom "kev tiv thaiv mos" uas tso siab rau kev kuaj pom, tswj cov nti txiav txim siab thiab IGBT kaw. Yog tias ib qho ntawm cov kev sib txuas ntawm qhov txuas no ua rau muaj teeb meem, kev tiv thaiv yuav ua tsis tiav. Lub fuse yog "kev tiv thaiv nyuaj" uas paub txog qhov loj ntawm qhov tam sim no, thiab thaum nws tuaj txog, nws tsis yaj, tsis muaj kev sib txuas nruab nrab, tsis muaj kev tiv thaiv, tsis muaj kev tiv thaiv. los yog calibration.
"Soft / hard ua ke" yog qhov kev nyab xeeb tshaj plaws nyob rau hauv high -voltage, high-tam sim no, siab -fault zog ib puag ncig ntawm PV DC sab: kev tiv thaiv hluav taws xob yog lub luag haujlwm rau cov khoom siv hluav taws xob niaj hnub thiab qhov tsis zoo me me, thaum fuses yog lub luag haujlwm rau qhov luv luv tshaj plaws -circuit thiab high-tam sim no tsis ua hauj lwm. Qhov ob yog complementary thiab indispensable.
