Photovoltaic inverters muaj cov txheej txheem nruj zoo li cov inverter zoo tib yam. Txhua lub inverter yuav tsum ua tau raws li cov lus qhia hauv qab no kom pom tau tias yog cov khoom tsim nyog.
1. Tso zis Voltage Stability
Nyob rau hauv lub photovoltaic system, lub zog hluav taws xob tsim los ntawm lub hnub ci cell yog thawj zaug khaws cia los ntawm lub roj teeb, thiab tom qab ntawd hloov mus rau hauv 220V lossis 380V alternating tam sim no los ntawm inverter. Txawm li cas los xij, lub roj teeb cuam tshuam los ntawm nws tus kheej them thiab tawm, thiab nws cov zis voltage sib txawv. Piv txwv li, rau lub roj teeb nrog lub npe 12V, nws cov nqi hluav taws xob 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 ntawm qhov ruaj khov-state tso zis voltage yuav tsum tsis txhob ntau tshaj ± 5% ntawm tus nqi ntsuas, thiab thaum lub load hloov dheev, cov zis voltage sib txawv yuav tsum tsis txhob ntau tshaj ± 10. % ntawm tus nqi ntsuas.
2. Waveform Distortion ntawm cov zis hluav taws xob
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. Feem ntau qhia raws li tag nrho cov waveform distortion ntawm cov zis voltage, nws tus 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 waveform distortion ntawm lub inverter loj heev, nws yuav ua rau muaj cua sov loj ntawm cov khoom thauj khoom, uas tsis tsim nyog. kev nyab xeeb ntawm cov khoom siv hluav taws xob thiab cuam tshuam rau lub cev. kev khiav hauj lwm efficiency.
3. Rated tso zis zaus
Rau cov khoom thauj xws li lub cev muaj zog, xws li tshuab ntxhua khaub ncaws, tub yees, thiab lwm yam, vim tias qhov kev pom zoo ntawm lub cev muaj zog yog 50Hz, qhov zaus siab dhau lossis qis dhau, uas yuav ua rau cov cuab yeej ua kom sov thiab txo cov kev ua haujlwm thiab kev pabcuam lub neej. ntawm qhov system. Cov zis zaus yuav tsum yog tus nqi ruaj khov, feem ntau yog lub zog zaus 50Hz, thiab nws qhov sib txawv yuav tsum tsis pub dhau ± 1% raws li kev ua haujlwm ib txwm muaj.
4. Thauj khoom fais fab
Qhia lub peev xwm ntawm lub inverter kom nqa inductive lossis capacitive loads. Lub zog thauj khoom ntawm sine yoj inverter yog 0.7 txog 0.9, thiab tus nqi ntsuas yog 0.9. Nyob rau hauv cov ntaub ntawv ntawm ib tug tej yam load hwj chim, yog hais tias lub hwj chim ntawm lub inverter yog tsawg, qhov yuav tsum tau muaj peev xwm ntawm lub inverter yuav nce, uas yuav ua rau kom tus nqi thiab ua kom pom tseeb zog ntawm lub AC Circuit Court ntawm lub photovoltaic system. Raws li tam sim no nce, qhov poob yuav inevitably nce, thiab qhov system efficiency kuj yuav txo.
5. Inverter efficiency
Qhov ua tau zoo ntawm lub inverter yog hais txog qhov sib piv ntawm qhov tso zis hluav taws xob rau lub zog hluav taws xob nyob rau hauv qhov kev ua haujlwm tau teev tseg, qhia raws li feem pua. Feem ntau, lub nominal efficiency ntawm lub photovoltaic inverter yog hais txog cov ntshiab kuj load, nyob rau hauv 80% load. s efficiency. Txij li tag nrho cov nqi ntawm photovoltaic system yog siab, qhov ua tau zoo ntawm photovoltaic inverter yuav tsum tau ua kom tiav, cov nqi hluav taws xob yuav tsum raug txo, thiab cov nqi siv hluav taws xob yuav tsum tau txhim kho. Tam sim no, qhov nominal efficiency ntawm mainstream inverters yog nyob nruab nrab ntawm 80% thiab 95%, thiab cov efficiency ntawm low-power inverters yuav tsum tsis pub tsawg tshaj li 85%. Nyob rau hauv tus txheej txheem tsim qauv ntawm lub photovoltaic system, tsis tsuas yog yuav tsum tau xaiv high-efficiency inverters, tab sis nyob rau tib lub sij hawm, lub system yuav tsum tau tsim nyog configured kom lub photovoltaic system load ua hauj lwm nyob ze ntawm lub optimum efficiency point ntau npaum li cas.
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 thaum qhov tso zis hluav taws xob yog 1 (piv txwv li cov khoom siv hluav taws xob ntshiab), qhov ntsuas cov zis hluav taws xob yog cov khoom lag luam ntawm cov zis tam sim no.
7. Kev tiv thaiv
Lub inverter nrog kev ua tau zoo heev yuav tsum tau ua tiav kev tiv thaiv kev ua haujlwm lossis kev ntsuas los cuam tshuam nrog ntau yam kev txawv txav thaum siv tiag tiag, kom lub inverter nws tus kheej thiab lwm yam khoom ntawm lub cev tsis puas.
(1) Input undervoltage policyholder:
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 insurance account:
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 dhau tam sim no 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 dhau ntawm tus nqi tso cai, txhawm rau tiv thaiv nws los ntawm kev puas tsuaj los ntawm qhov surge 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) Tso zis luv-circuit lav
Lub inverter luv-circuit tiv thaiv lub sij hawm yuav tsum tsis txhob ntau tshaj 0.5s.
(5) Input rov qab polarity tiv thaiv:
Thaum qhov zoo thiab qhov tsis zoo ntawm cov tswv yim terminals yog 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, thiab lwm yam.
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
Cim lub peev xwm ntawm lub inverter pib nrog kev thauj khoom thiab kev ua haujlwm thaum lub sijhawm ua haujlwm dynamic. Lub inverter yuav tsum tau lav kom pib txhim khu kev qha nyob rau hauv rated load.
9.o yig
Transformers, lim inductors, hluav taws xob hloov hluav taws xob thiab cov kiv cua hauv cov khoom siv hluav taws xob hluav taws xob tag nrho tsim suab nrov. Thaum lub inverter nyob rau hauv ib txwm ua haujlwm, nws lub suab nrov yuav tsum tsis pub tshaj 80dB, thiab lub suab nrov ntawm lub inverter me me yuav tsum tsis pub tshaj 65dB.
Post lub sij hawm: Feb-08-2022
