Dab tsi yog Qhov Kev Ntsuas Tseem Ceeb Ntawm Hnub Ci Photovoltaic Inverters?
Jul 12, 2024
Photovoltaic inverters yog ib qho tseem ceeb ntawm kev sib npaug (BOS) hauv cov tshuab photovoltaic array thiab tuaj yeem siv nrog cov khoom siv hluav taws xob AC. Hnub ci inverters muaj kev ua haujlwm tshwj xeeb rau photovoltaic arrays, xws li qhov siab tshaj plaws lub zog taw tes nrhiav thiab tiv thaiv Islanding. Yog li, dab tsi yog lub ntsiab lus qhia ntawm photovoltaic inverters?
1. Tso zis voltage stability
Hauv cov tshuab photovoltaic, lub zog hluav taws xob tsim los ntawm lub hnub ci hlwb yog thawj zaug khaws cia los ntawm cov roj teeb thiab tom qab ntawd hloov mus rau 220V lossis 380V AC lub zog los ntawm inverters. Txawm li cas los xij, vim muaj kev cuam tshuam ntawm nws tus kheej them thiab tso tawm, qhov tso zis hluav taws xob ntawm cov roj teeb muaj ntau qhov sib txawv. Piv txwv li, tus nqi hluav taws xob ntawm lub nominal 12V roj teeb tuaj yeem sib txawv ntawm 10.8 thiab 14.4V (ntau tshaj qhov no yuav ua rau lub roj teeb puas). Rau ib tug tsim nyog inverter, thaum lub input voltage hloov nyob rau hauv no ntau yam, qhov kev hloov nyob rau hauv nws ruaj khov-lub xeev tso zis voltage yuav tsum tsis txhob ntau tshaj ± 5% ntawm tus nqi ntsuas. Nyob rau tib lub sij hawm, thaum lub load hloov dheev, qhov tso zis voltage sib txawv yuav tsum tsis pub tshaj ± 10% ntawm tus nqi ntsuas.
2. Tso zis voltage waveform distortion
Rau sine yoj inverters, qhov siab tshaj plaws tso cai waveform distortion (los yog cov ntsiab lus sib haum xeeb) yuav tsum tau teev tseg. Nws yog feem ntau qhia raws li tag nrho cov waveform distortion ntawm cov zis voltage, thiab nws cov nqi yuav tsum tsis txhob ntau tshaj 5% (ib theem tso zis tso cai rau 10%). Txij li thaum qhov kev txiav txim siab sib haum xeeb tam sim no los ntawm inverter yuav ua rau muaj kev puas tsuaj ntxiv xws li eddy tam sim no ntawm lub inductive load, yog tias lub inverter waveform distortion loj dhau lawm, nws yuav ua rau muaj cua sov loj ntawm cov khoom thauj khoom, uas tsis tsim nyog rau kev nyab xeeb. ntawm cov khoom siv hluav taws xob thiab cuam tshuam rau kev ua haujlwm ntawm lub cev.
3. Rated tso zis zaus
Rau cov khoom siv xws li lub cev muaj zog, xws li lub tshuab ntxhua khaub ncaws thiab lub tub yees, vim tias qhov kev ua haujlwm zoo tshaj plaws ntawm lawv lub cev muaj zog yog 50Hz, siab dhau lossis tsawg zaus yuav ua rau cov cuab yeej ua kom sov, txo cov kev ua haujlwm thiab kev pabcuam lub neej, yog li Qhov tso zis zaus ntawm lub inverter yuav tsum yog tus nqi ruaj khov, feem ntau 50Hz, thiab nws qhov sib txawv yuav tsum nyob rau hauv ± 1% raws li kev ua haujlwm ib txwm muaj.
4. Thauj khoom fais fab
Characterizes lub peev xwm ntawm lub inverter nqa inductive loads los yog capacitive loads. Lub zog thauj khoom ntawm sine yoj inverter yog {{0}}.7 ~ 0.9, thiab tus nqi ntsuas yog 0.9. Nyob rau hauv qhov xwm txheej ntawm lub hwj chim tas li, yog tias lub zog ntawm lub inverter qis, lub peev xwm ntawm qhov yuav tsum tau inverter yuav nce, uas yuav ua rau kom tus nqi ntawm ib sab, thiab ua kom pom tseeb lub zog ntawm AC Circuit Court ntawm photovoltaic system. , ua kom lub voj voog tam sim no, nce qhov poob, thiab txo qhov system efficiency.
5. Inverter efficiency
Qhov ua tau zoo ntawm lub inverter yog hais txog qhov sib piv ntawm nws cov zis hluav taws xob rau cov khoom siv hluav taws xob raws li kev ua haujlwm tau teev tseg, qhia raws li feem pua. Feem ntau, qhov nominal efficiency ntawm lub photovoltaic inverter yog hais txog qhov ua tau zoo nyob rau hauv cov ntshiab kuj load thiab 80% load. Vim yog tus nqi tag nrho ntawm photovoltaic system, qhov ua tau zoo ntawm photovoltaic inverter yuav tsum ua kom siab tshaj plaws kom txo tau cov nqi hluav taws xob thiab txhim kho cov nqi kev ua haujlwm ntawm photovoltaic system. Tam sim no, qhov nominal efficiency ntawm lub mainstream inverter yog nyob nruab nrab ntawm 80% thiab 95%, thiab cov efficiency ntawm lub me zog inverter yuav tsum tsis pub tsawg tshaj li 85%. Nyob rau hauv tus txheej txheem tsim ntawm lub photovoltaic system, tsis tsuas yog yuav tsum tau xaiv ib tug high-efficiency inverter, tab sis kuj lub system yuav tsum tsim nyog configured sim ua kom lub photovoltaic system load ua hauj lwm nyob ze ntawm qhov pom efficiency point.
6. Rated tso zis tam sim no (los yog ntsuas cov zis muaj peev xwm)
Qhia qhov ntsuas qhov tso zis tam sim no ntawm lub inverter nyob rau hauv qhov teev cov khoom siv fais fab. Qee cov khoom lag luam inverter muab cov peev txheej tso tawm, uas tau qhia hauv VA lossis kVA. Lub peev xwm ntsuas ntawm lub inverter yog cov khoom ntawm cov ntsuas tso zis voltage thiab cov zis tawm tam sim no thaum lub zog tso zis yog 1 (piv txwv li cov khoom siv dawb huv).
7. Kev tiv thaiv kev ntsuas
Lub inverter nrog kev ua tau zoo yuav tsum tau ua tiav kev tiv thaiv kev ua haujlwm lossis kev ntsuas los cuam tshuam nrog ntau yam txawv txav uas tshwm sim thaum siv tiag tiag, kom lub inverter nws tus kheej thiab lwm yam ntawm lub cev tiv thaiv kev puas tsuaj.
(1) Input undervoltage tiv thaiv:Thaum lub input voltage qis dua 85% ntawm qhov ntsuas hluav taws xob, lub inverter yuav tsum muaj kev tiv thaiv thiab tso saib.
(2) Input overvoltage tiv thaiv:Thaum lub input voltage siab tshaj 130% ntawm qhov ntsuas voltage, lub inverter yuav tsum muaj kev tiv thaiv thiab tso saib.
(3) Kev tiv thaiv overcurrent:Kev tiv thaiv overcurrent ntawm lub inverter yuav tsum muaj peev xwm ua kom lub sijhawm ua haujlwm thaum lub sijhawm thauj khoom luv luv lossis tam sim no tshaj li qhov tso cai, txhawm rau tiv thaiv nws los ntawm kev puas tsuaj los ntawm qhov hluav taws xob tam sim no. Thaum ua hauj lwm tam sim no tshaj 150% ntawm tus nqi ntsuas, lub inverter yuav tsum tau txais kev tiv thaiv.
(4) Kev tiv thaiv luv luv Circuit Court:Lub sijhawm tiv thaiv luv luv ntawm inverter yuav tsum tsis pub tshaj 0.5s.
(5) Input rov qab kev twb kev txuas tiv thaiv:Thaum qhov zoo thiab qhov tsis zoo ntawm cov khoom siv hluav taws xob tau thim rov qab, lub inverter yuav tsum muaj kev tiv thaiv thiab tso saib.
(6) Kev tiv thaiv xob laim:Lub inverter yuav tsum muaj kev tiv thaiv xob laim.
(7) Kev tiv thaiv kub dhau
Tsis tas li ntawd, rau inverters tsis muaj qhov ntsuas qhov ntsuas hluav taws xob, lub inverter yuav tsum muaj cov khoom siv hluav taws xob tiv thaiv kev tiv thaiv los tiv thaiv lub nra ntawm overvoltage puas.
8. Pib yam ntxwv
Characterizes lub inverter lub peev xwm pib nrog load thiab nws cov kev ua tau zoo thaum lub sij hawm ua hauj lwm dynamic. Lub inverter yuav tsum xyuas kom ntseeg tau tias pib nyob rau hauv rated load.
9. Suab nrov
Transformers, lim inductors, hluav taws xob hloov hluav taws xob, kiv cua thiab lwm yam khoom siv hluav taws xob hauv hluav taws xob yuav tsim suab nrov. Thaum lub inverter ua haujlwm ib txwm, nws lub suab nrov yuav tsum tsis pub tshaj 80dB, thiab lub suab nrov ntawm cov inverter me me yuav tsum tsis pub tshaj 65dB.
Hnub ci photovoltaic fuse tooj liab caps yog siv los tiv thaiv cov circuits hauv inverter los ntawm overload los yog luv luv Circuit Court, yog li ua kom muaj kev nyab xeeb ntawm lub inverter. Lub hnub ci photovoltaic fuse tooj liab caps peb tsim muaj ob qho tib si tus nqi thiab lav zoo. Yog tias koj xav paub ntau ntxiv txog cov ntaub ntawv khoom, koj tuaj yeem nyem qhov txuas mus saib peb lub vev xaib:
https://www.stamping-welding.com/fuse-cap-and-contact/cap-contact-for-pv-fuse/
Xaiv pebHnub ci photovoltaic fuses tooj liab capstsis yog tsuas yog xaiv qhov zoo tshaj plaws kev txhawb nqa thiab cov khoom lav, tab sis kuj xaiv cov kev ntseeg siab thiab lub zog lav ntawm kev koom tes nrog cov tuam txhab ua lag luam thoob ntiaj teb. Txawm hais tias koj tab tom tsim lub chaw tsim hluav taws xob photovoltaic loj lossis txhawb kev faib hluav taws xob photovoltaic, peb txaus siab los ua koj tus khub txhim khu kev qha los koom tes txhawb kev txhim kho kev lag luam hnub ci.
