Kev lag luam PV muaj ib lo lus hais tias: 2018 yog thawj xyoo ntawm kev faib hluav taws xob photovoltaic. Cov kab lus no tau lees paub hauv thaj chaw ntawm photovoltaic photovoltaic lub thawv 2018 Nanjing faib cov kev kawm txuj ci thev naus laus zis photovoltaic! Installers thiab distributors thoob plaws lub teb chaws sib sau ua ke nyob rau hauv Nanjing systematically kawm paub txog kev faib photovoltaic fais fab nroj tsuag kev tsim kho.
Raws li tus kws tshaj lij hauv kev lag luam photovoltaic inverters, Renac yeej ib txwm mob siab rau kev tshawb fawb photovoltaic. Ntawm qhov chaw kawm Nanjing, Renac Technical Service Manager tau raug caw los qhia txog kev xaiv cov inverters thiab cov kev pabcuam ntse. Tom qab chav kawm, cov tub ntxhais kawm tau txais kev pabcuam los tshuaj xyuas cov teeb meem ntawm cov chaw siv hluav taws xob photovoltaic thiab tau txais kev qhuas los ntawm cov menyuam kawm ntawv.
Tswv yim:
1. Lub vijtsam inverter tsis tshwm sim
Failure analysis:
Yog tsis muaj DC input, lub inverter LCD yog powered los ntawm DC.
Tej Yam Ua Tau:
(1) Qhov hluav taws xob ntawm cov khoom siv tsis txaus, qhov hluav taws xob input qis dua qhov pib voltage, thiab lub inverter tsis ua haujlwm. Cov khoom siv hluav taws xob muaj feem xyuam rau hnub ci hluav taws xob.
(2) PV input davhlau ya nyob twg yog thim rov qab. PV davhlau ya nyob twg muaj ob tug ncej, zoo thiab tsis zoo, thiab lawv yuav tsum sib haum mus rau ib leeg. Lawv tsis tuaj yeem txuas rov qab nrog lwm pab pawg.
(3) DC hloov tsis raug kaw.
(4) Thaum ib txoj hlua txuas nyob rau hauv parallel, ib qho ntawm cov connectors tsis txuas.
(5) Muaj qhov luv luv hauv lub module, ua rau tsis muaj lwm txoj hlua ua haujlwm.
Kev daws:
Ntsuas qhov DC input voltage ntawm lub inverter nrog qhov voltage ntau ntawm lub multimeter. Thaum qhov hluav taws xob zoo li qub, tag nrho qhov hluav taws xob yog qhov sib npaug ntawm qhov hluav taws xob ntawm txhua qhov khoom. Yog tias tsis muaj qhov hluav taws xob, tom qab ntawd tshuaj xyuas qhov hloov DC, lub davhlau ya nyob twg thaiv, cable txuas, thiab cov khoom hauv kev txiav txim; yog tias muaj ntau yam khoom, cais kev nkag mus.
Yog hais tias lub inverter siv rau ib lub sij hawm ntawm lub sij hawm thiab tsis muaj lwm yam tshwm sim, lub inverter hardware Circuit Court yog faulty. Hu rau tus kws tshaj lij kev muag khoom tom qab muag.
2. Lub inverter tsis txuas nrog lub network
Failure analysis:
Tsis muaj kev sib txuas ntawm inverter thiab kab sib chaws.
Tej Yam Ua Tau:
(1) AC hloov tsis raug kaw.
(2) AC tso zis davhlau ya nyob twg ntawm lub inverter tsis txuas.
(3) Thaum xaim, lub davhlau ya nyob twg sab saud ntawm lub inverter tso zis davhlau ya nyob twg yog loosened.
Kev daws:
Ntsuas lub AC tso zis voltage ntawm lub inverter nrog qhov voltage ntau ntawm lub multimeter. Nyob rau hauv cov xwm txheej ib txwm muaj, cov khoom siv hluav taws xob yuav tsum muaj 220V lossis 380V voltage. Yog tias tsis yog, xyuas seb qhov txuas txuas txuas puas yog xoob, yog tias qhov hloov pauv AC raug kaw, thiab yog tias qhov hloov pauv kev tiv thaiv tawm raug kaw.
3. Inverter PV Overvoltage
Failure analysis:
DC voltage siab heev tswb.
Tej Yam Ua Tau:
Ntau dhau ntawm cov khoom hauv series ua rau muaj qhov hluav taws xob ntau tshaj qhov input voltage txwv ntawm lub inverter.
Kev daws:
Vim yog qhov kub thiab txias ntawm cov khoom siv, qhov kub thiab txias, qhov siab dua qhov voltage. Lub input voltage ntau ntawm ib-theem txoj hlua inverter yog 50-600V, thiab cov lus thov txoj hlua hluav taws xob yog nyob nruab nrab ntawm 350-400. Lub input voltage ntau ntawm peb-theem hlua inverter yog 200-1000V. Tom qab voltage ntau ntawm 550-700V. Nyob rau hauv no voltage ntau, lub efficiency ntawm lub inverter yog kuj siab. Thaum cov hluav taws xob qis qis thaum sawv ntxov thiab yav tsaus ntuj, nws tuaj yeem tsim hluav taws xob, tab sis nws tsis ua rau qhov hluav taws xob ntau tshaj qhov txwv ntawm lub zog inverter, ua rau lub tswb nrov thiab nres.
4. Inverter rwb thaiv tsev txhaum
Failure analysis:
Lub rwb thaiv tsev tsis kam ntawm photovoltaic system rau hauv av yog tsawg dua 2 megohms.
Tej Yam Ua Tau:
Hnub ci modules, junction boxes, DC cables, inverters, AC cables, wiring terminals, thiab lwm yam, muaj ib tug luv luv Circuit Court rau hauv av los yog kev puas tsuaj rau lub rwb thaiv tsev txheej. Cov PV terminals thiab AC thaiv vaj tse yog xoob, ua rau dej nkag.
Kev daws:
Tshem tawm cov kab sib chaws, inverter, xyuas qhov kev tiv thaiv ntawm txhua yam khoom siv rau hauv av nyob rau hauv lem, nrhiav cov ntsiab lus teeb meem, thiab hloov.
5. Daim phiaj yuam kev
Failure analysis:
Daim phiaj voltage thiab zaus tsawg dhau los yog siab dhau.
Tej Yam Ua Tau:
Hauv qee thaj chaw, lub network nyob deb nroog tsis tau rov tsim kho dua thiab cov kab hluav taws xob hluav taws xob tsis nyob hauv qhov kev tswj hwm kev nyab xeeb.
Kev daws:
Siv ib lub multimeter los ntsuas cov kab hluav taws xob thiab zaus, yog tias nws tawm ntawm kev tos rau daim phiaj rov qab mus rau qhov qub. Yog tias daim phiaj hluav taws xob zoo li qub, nws yog lub inverter uas pom qhov tsis ua haujlwm ntawm lub rooj tsav xwm hauv Circuit Court. Disconnect tag nrho cov DC thiab AC terminals ntawm lub tshuab thiab cia lub inverter tso rau li 5 feeb. Kaw lub hwj huam mov. Yog tias nws tuaj yeem rov pib dua, yog tias nws tsis tuaj yeem rov qab tau, hu rau. Tom qab kev muag khoom technical engineer.