Dab tsi yog "kev cais tawm qhov txhaum"?
Nyob rau hauv lub tshuab photovoltaic nrog lub transformer-tsawg inverter, DC yog cais tawm hauv av. Modules uas muaj qhov tsis zoo module cais tawm, cov xov hlau tsis muaj kev tiv thaiv, cov khoom siv hluav taws xob tsis zoo, lossis qhov cuam tshuam hauv inverter tuaj yeem ua rau DC tam sim no to hauv av (PE - tiv thaiv lub ntiaj teb). Qhov txhaum ntawd kuj yog hu ua ib qho txhaum cais.
Txhua lub sij hawm Renac inverter nkag mus rau hom kev ua haujlwm thiab pib tsim lub zog, qhov kev tiv thaiv ntawm av thiab DC tam sim no-nqa conductors raug kuaj xyuas. Lub inverter qhia txog kev sib cais yuam kev thaum nws pom tag nrho cov kev sib cais tsis sib haum ntawm tsawg dua 600kΩ hauv ib theem inverters, lossis 1MΩ hauv peb theem inverters.
Yuav ua li cas yog ib qho kev sib cais txhaum tshwm sim?
1. Nyob rau hauv huab cua ntub, tus naj npawb ntawm cov xwm txheej cuam tshuam nrog cov kab ke kev sib cais tau nce. Kev taug qab qhov kev txhaum no tsuas yog ua tau thaum lub sijhawm nws tshwm sim. Feem ntau yuav muaj kev sib cais ua txhaum thaum sawv ntxov uas qee zaum ploj mus sai li sai tau thaum cov dej ntws tawm. Qee qhov xwm txheej, nws nyuaj rau kev txiav txim siab seb qhov twg ua rau muaj kev sib cais tsis raug. Txawm li cas los xij, feem ntau nws tuaj yeem muab tso rau hauv kev ua haujlwm tsis zoo.
2. Yog hais tias lub shielding ntawm cov hlau puas thaum lub sij hawm haum, ib tug luv luv Circuit Court tej zaum yuav tshwm sim ntawm DC thiab PE (AC). Qhov no yog qhov peb hu ua kev cais tawm txhaum. Dhau li ntawm qhov teeb meem nrog kev tiv thaiv cable, qhov kev sib cais tsis raug kuj tuaj yeem tshwm sim los ntawm kev ya raws lossis kev sib txuas tsis zoo hauv lub hnub ci vaj huam sib luag lub thawv.
Cov lus yuam kev uas tshwm sim ntawm lub vijtsam inverter yog "kev cais tawm txhaum cai". Rau kev nyab xeeb vim li cas, tsuav yog qhov txhaum no tshwm sim, lub inverter yuav tsis hloov ib lub zog li tej zaum yuav muaj kev phom sij rau lub neej tam sim no ntawm cov khoom siv hluav taws xob ntawm qhov system.
Tsuav tsuas muaj ib qho hluav taws xob sib txuas ntawm DC thiab PE, tsis muaj kev phom sij tam sim no vim tias lub kaw lus tsis raug kaw thiab tsis muaj tam sim no tuaj yeem ntws los ntawm nws. Txawm li cas los xij, ib txwm siv ceev faj vim tias muaj kev phom sij:
1. Qhov thib ob luv-circuit rau lub ntiaj teb tau tshwm sim PE (2) tsim ib tug luv luv-circuit tam sim no los ntawm cov modules thiab thaiv. Qhov no yuav ua rau muaj kev pheej hmoo ntawm hluav taws.
2. Kov cov modules yuav ua rau lub cev raug mob hnyav.
2. Kev kuaj mob
Taug qab ib qho txhaum cai
1. Tshem tawm qhov txuas AC.
2. Ntsuas thiab ua ib daim ntawv qhia txog qhov qhib-circuit voltage ntawm tag nrho cov hlua.
3. Tshem tawm cov PE (AC lub ntiaj teb) thiab txhua qhov av ntawm lub inverter. Cia lub DC txuas.
- Liab LED teeb pom kev ua yuam kev
- Cov lus tsis raug cais tawm tsis pom lawm vim tias lub inverter tsis tuaj yeem nyeem ntawv ntawm DC thiab AC.
4. Tshem tawm txhua txoj hlua hluav taws xob DC tab sis khaws DC + thiab DC- ntawm txhua txoj hlua ua ke.
5. Siv lub DC voltmeter ntsuas qhov voltage ntawm (AC) PE thiab DC (+) thiab nruab nrab ntawm (AC) PE thiab DC – thiab ua ib daim ntawv ntawm ob qhov voltages.
6. Koj yuav pom tias ib lossis ntau qhov kev nyeem ntawv tsis qhia 0 Volt (Ua ntej, qhov kev nyeem ntawv qhia qhov qhib hluav taws xob voltage, ces nws poob rau 0); cov hlua no muaj ib qho txhaum cai. Cov voltages ntsuas tuaj yeem pab taug qab qhov teeb meem.
Piv txwv li:
Txoj hlua nrog 9 hnub ci vaj huam sib luag Uoc = 300 V
PE thiab DC (V1) = 200V (= modules 1, 2, 3, 4, 5, 6,)
PE thiab –DC (V2) = 100V (= modules 7, 8, 9,)
Qhov txhaum no yuav nyob nruab nrab ntawm module 6 thiab 7.
CEEB TOOM!
Kov qhov uas tsis yog rwb thaiv tsev ntawm txoj hlua los yog thav duab tuaj yeem ua rau raug mob hnyav. Siv cov cuab yeej kev nyab xeeb tsim nyog thiab cov cuab yeej ntsuas kev nyab xeeb
7. Yog hais tias tag nrho cov ntsuas cov hlua yog ok, thiab inverter tseem tshwm sim qhov yuam kev "kev rho tawm txhaum", inverter hardware teeb meem. Hu rau kev txhawb nqa los muab kev hloov pauv.
3. Cov lus xaus
"Ib qho txhaum cai" feem ntau yog qhov teeb meem ntawm lub hnub ci vaj huam sib luag sab (tsuas yog ob peb qhov teeb meem inverter), feem ntau yog vim huab cua ntub, teeb meem hnub ci vaj huam sib luag, dej hauv lub thawv sib txuas, hnub ci vaj huam sib luag lossis cables laus.