Ama-inverters e-Photovoltaic anezindinganiso eziqinile zobuchwepheshe njengama-inverter ajwayelekile. Noma iyiphi inverter kufanele ihlangabezane nezinkomba zobuchwepheshe ezilandelayo ukuze ithathwe njengomkhiqizo ofanelekayo.
1. Okukhipha Voltage Ukuzinza
Kuhlelo lwe-photovoltaic, amandla kagesi akhiqizwa iseli yelanga agcinwa kuqala yibhethri, bese eguqulwa abe ngu-220V noma 380V alternating current ngokusebenzisa inverter. Kodwa-ke, ibhethri ithintwa ukushajwa kwayo kanye nokuphuma kwayo, futhi i-voltage yayo yokuphuma iyahlukahluka kakhulu. Isibonelo, ebhethrini elinegama elingu-12V, inani layo likagesi lingahluka phakathi kuka-10.8 no-14.4V (ukweqa lobu bubanzi kungase kubangele umonakalo ebhethrini) . Ku-inverter efanelekayo, lapho i-voltage yokufaka ishintsha ngaphakathi kwalolu bubanzi, ukuguqulwa kwe-voltage ephumayo yesimo esiqinile akufanele kudlule ku-±5% yenani elilinganiselwe, futhi lapho umthwalo ushintsha kungazelelwe, ukuchezuka kwe-voltage ephumayo akufanele kudlule ku-±10. % yenani elilinganiselwe.
2. I-Waveform Distortion of Output Voltage
Kuma-sine wave inverters, ubukhulu obuvunyelwe bokuhlanekezelwa kwe-waveform (noma okuqukethwe kwe-harmonic) kufanele kucaciswe. Ngokuvamile kuvezwa njengokuhlanekezelwa kwe-waveform okuphelele kwe-voltage ephumayo, inani layo akufanele lidlule u-5% (okukhiphayo kwesigaba esisodwa kuvumela u-10%). Njengoba ukukhishwa kwamanje kwe-harmonic ephezulu ye-harmonic yi-inverter kuzodala ukulahlekelwa okwengeziwe okufana nomthamo we-eddy emthwalweni we-inductive, uma ukuhlanekezela kwe-waveform ye-inverter kukhulu kakhulu, kuzodala ukushisa okukhulu kwezingxenye zomthwalo, okungenakulungele ukuphepha kwemishini kagesi futhi kuthinta kabi uhlelo. ukusebenza kahle.
3. Isilinganiso sokukhipha imvamisa
Ngemithwalo efaka amamotho, njengemishini yokuwasha, iziqandisi, njll., ngoba imvamisa efanele yemoto ingu-50Hz, imvamisa iphezulu kakhulu noma iphansi kakhulu, okuzodala ukuthi okokusebenza kushise futhi kunciphise ukusebenza kahle nempilo yesevisi. yohlelo. Ifrikhwensi yokuphumayo kufanele ibe inani elizinzile uma kuqhathaniswa, ngokuvamile ifrikhwensi yamandla engu-50Hz, futhi ukuchezuka kwayo kufanele kube phakathi kuka-±1% ngaphansi kwezimo ezivamile zokusebenza.
4. Layisha amandla factor
Bamba ikhono le-inverter lokuthwala imithwalo ye-inductive noma ye-capacitive. Isici samandla okulayisha se-sine wave inverter singu-0.7 kuya ku-0.9, futhi inani elilinganiselwe lingu-0.9. Endabeni yamandla athile omthwalo, uma isici samandla se-inverter siphansi, umthamo odingekayo we-inverter uzokhula, okuzokwandisa izindleko futhi kwandise amandla abonakalayo wesifunda se-AC sesistimu ye-photovoltaic. Njengoba ukwanda kwamanje, ukulahlekelwa kuzokwanda nakanjani, futhi ukusebenza kahle kwesistimu nakho kuzokwehla.
5. Ukusebenza kahle kwe-inverter
Ukusebenza kahle kwe-inverter kubhekisela esilinganisweni samandla okukhiphayo kumandla okufakwayo ngaphansi kwezimo zokusebenza ezishiwo, ezivezwa njengephesenti. Ngokuvamile, ukusebenza kahle okubizwa nge-photovoltaic inverter kubhekisela kumthwalo ohlanzekile wokumelana, ngaphansi komthwalo we-80%. s ukusebenza kahle. Njengoba izindleko eziphelele zesistimu ye-photovoltaic ziphakeme, ukusebenza kahle kwe-inverter ye-photovoltaic kufanele kukhuliswe, izindleko zesistimu kufanele zincishiswe, futhi ukuphumelela kwezindleko zesistimu ye-photovoltaic kufanele kuthuthukiswe. Njengamanje, ukusebenza kahle okujwayelekile kwama-inverters ajwayelekile kuphakathi kuka-80% no-95%, futhi ukusebenza kahle kweziguquli zamandla aphansi kuyadingeka ukuthi kungabi ngaphansi kwama-85%. Enkambweni yangempela yokuklama yesistimu ye-photovoltaic, akufanele nje kukhethwe ama-inverters asebenza kahle kakhulu, kodwa ngesikhathi esifanayo, isistimu kufanele ilungiswe ngokufanele ukuze wenze umthwalo wesistimu we-photovoltaic usebenze eduze kwephuzu elisebenza kahle kakhulu ngangokunokwenzeka.
6. Ukukhishwa okulinganiselwe kwamanje (noma umthamo wokukhiphayo olinganiselwe)
Ibonisa umthamo wamanje olinganiselwe we-inverter ngaphakathi kwebanga lesici samandla esishiwo. Eminye imikhiqizo ye-inverter inikeza umthamo wokuphuma olinganiselwe, ovezwa nge-VA noma i-kVA. Umthamo olinganiselwe we-inverter yilapho isici samandla okukhiphayo singu-1 (okungukuthi umthwalo oqinile ophikisayo), i-voltage elinganiselwe ephumayo iwumkhiqizo wokukhishwayo okulinganiselwe kwamanje.
7. Izinyathelo zokuzivikela
I-inverter esebenza kahle kakhulu kufanele futhi ibe nemisebenzi yokuvikela ephelele noma izinyathelo zokubhekana nezimo ezihlukahlukene ezingavamile ngesikhathi sokusetshenziswa kwangempela, ukuze i-inverter ngokwayo nezinye izingxenye zesistimu zingalimazi.
(1) Umnikazi wenqubomgomo yokufaka i-undervoltage:
Uma i-voltage yokufaka ingaphansi kuka-85% we-voltage elinganiselwe, i-inverter kufanele ibe nokuvikeleka nokuboniswa.
(2) Faka i-akhawunti yomshwalense we-overvoltage:
Uma i-voltage yokufaka ingaphezu kuka-130% wevoltage elinganiselwe, i-inverter kufanele ibe nesivikelo nesibonisi.
(3) Ukuvikelwa kwamanje:
Ukuvikelwa okudlulele kwamanje kwe-inverter kufanele kukwazi ukuqinisekisa isenzo esifike ngesikhathi lapho umthwalo une-circuited ifushane noma i-current idlula inani elivumelekile, ukuze ivimbele ukuthi ingalinyazwa amandla okushisa. Lapho ukusebenza kwamanje kudlula u-150% yenani elilinganiselwe, i-inverter kufanele ikwazi ukuvikela ngokuzenzakalelayo.
(4) Isiqinisekiso sokukhishwa kwesifunda esifushane
Isikhathi sesenzo sokuvikela i-inverter short-circuit akumele sidlule ama-0.5s.
(5) Okokufaka kokuvikela ukuhlehla kwe-polarity:
Uma izigxobo ezinhle nezingezinhle zamatheminali okokufaka zihlehliswa, isiguquli kufanele sibe nomsebenzi wokuvikela nesibonisi.
(6) Ukuvikelwa kombani:
I-inverter kufanele ibe nesivikelo sombani.
(7) Ukuvikelwa ngaphezu kwezinga lokushisa, njll.
Ngaphezu kwalokho, kuma-inverters ngaphandle kwezinyathelo zokuqiniswa kwe-voltage, i-inverter kufanele futhi ibe nezinyathelo zokuvikela ukuphuma kwe-overvoltage ukuvikela umthwalo emonakalweni we-overvoltage.
8. Izici zokuqalisa
Bamba ikhono le-inverter ukuqala ngomthwalo kanye nokusebenza ngesikhathi sokusebenza okuguquguqukayo. I-inverter kufanele iqinisekiswe ukuthi iqala ngokuthembekile ngaphansi komthwalo olinganiselwe.
9. umsindo
Ama-Transformer, ama-inductors okuhlunga, ama-switch ka-electromagnetic namafeni asemashini kagesi kagesi konke kudala umsindo. Uma i-inverter isebenza ngokujwayelekile, umsindo wayo akufanele udlule i-80dB, futhi umsindo we-inverter encane akufanele udlule i-65dB.
Isikhathi sokuthumela: Feb-08-2022
