Photovoltaic kashe-grid inverter

Gabatarwar Samfur
The PV off-grid inverter shine na'urar jujjuya wutar lantarki wanda ke turawa-jawa yana haɓaka ikon shigar da DC sannan kuma ya juyar da shi zuwa ikon 220V AC ta hanyar inverter gada SPWM sinusoidal pulse wide modulation technology.
Kamar grid-connected inverters, PV kashe-grid inverters bukatar high dace, high aminci, da kuma fadi da kewayon DC shigar ƙarfin lantarki; a cikin tsarin wutar lantarki na PV masu matsakaici da babba, fitarwa na inverter ya kamata ya zama igiyar sinusoidal tare da ƙananan murdiya.

Ayyuka da Features
1. 16-bit microcontroller ko 32-bit DSP microprocessor ana amfani dashi don sarrafawa.
2. Yanayin sarrafawa na PWM, yana inganta haɓaka sosai.
3. Dauki dijital ko LCD don nuna sigogin aiki daban-daban, kuma yana iya saita sigogi masu dacewa.
4. Rawanin murabba'i, raƙuman gyare-gyare, fitowar raƙuman ruwa. Fitowar igiyar igiyar ruwa, ƙimar karkatar da igiyar igiyar ruwa bai wuce 5%.
5. Babban ƙarfin ƙarfin ƙarfin ƙarfafa daidaito, ƙarƙashin ƙimar ƙima, ƙimar fitarwa gabaɗaya ƙasa da ƙari ko debe 3%.
6. Aikin farawa a hankali don guje wa babban tasiri na yanzu akan baturi da kaya.
7. Maɗaukaki mai saurin canzawa, ƙananan girman da nauyi mai haske.
8. An sanye shi da daidaitaccen tsarin sadarwa na RS232/485, dacewa don sarrafa sadarwa mai nisa.
9. Ana iya amfani da shi a cikin yanayi sama da mita 5500 sama da matakin teku.
10, Tare da shigar da baya dangane kariya, shigar da undervoltage kariya, shigar da overvoltage kariya, fitarwa overvoltage kariya, fitarwa obalodi kariya, fitarwa short kewaye kariya, overheat kariya da sauran kariya ayyuka.

Muhimman sigogin fasaha na masu juyawa na kashe-grid
A lokacin da zabar wani kashe-grid inverter, baya ga kula da fitarwa waveform da keɓe irin na inverter, akwai da dama fasaha sigogi da suke da muhimmanci sosai, kamar tsarin ƙarfin lantarki, fitarwa ikon, kololuwa ikon, hira yadda ya dace, sauyawa lokaci, da dai sauransu Zabar wadannan sigogi yana da babban tasiri a kan load ta lantarki bukatar.
1) Wutar lantarki:
Wutar lantarki ce ta fakitin baturi. Wutar shigar da wutar lantarki na kashe-grid inverter da ƙarfin fitarwa na mai sarrafawa iri ɗaya ne, don haka lokacin zayyana da zaɓin samfurin, kula da kiyaye iri ɗaya tare da mai sarrafawa.
2) Ƙarfin fitarwa:
Kashe-grid inverter fitarwa ikon magana yana da nau'i biyu, daya shine bayyanannen ikon magana, naúrar shine VA, wannan shine alamar UPS, ainihin ƙarfin fitarwa mai aiki kuma yana buƙatar ninka ƙarfin wutar lantarki, kamar 500VA kashe-grid inverter, factor factor shine 0.8, ainihin fitarwa mai aiki mai ƙarfi shine 400W, wato, 400 na iya sarrafa wutar lantarki. da dai sauransu; na biyu shine ma'anar ikon aiki, naúrar shine W, kamar 5000W kashe-grid inverter, ainihin ƙarfin aiki na fitarwa shine 5000W.
3) Mafi girman iko:
A cikin PV kashe-grid tsarin, kayayyaki, batura, inverters, lodi hada da lantarki tsarin, da inverter fitarwa ikon, an ƙaddara da kaya, wasu inductive lodi, kamar kwandishan, famfo, da dai sauransu, da mota a ciki, da farawa ikon ne 3-5 sau da rated ikon, don haka kashe-grid inverter yana da musamman bukatun ga obalodi. Ƙarfin kololuwa shine ƙarfin juzu'i na inverter kashe-grid.
Mai jujjuyawar yana ba da kuzarin farawa zuwa kaya, wani ɓangare daga baturi ko tsarin PV, kuma an samar da wuce gona da iri ta hanyar abubuwan ajiyar makamashi a cikin inverter - capacitors da inductor. Capacitors da inductor duka biyun abubuwan adana makamashi ne, amma bambancin shine cewa capacitors na adana makamashin lantarki ta hanyar lantarki, kuma girman ƙarfin capacitor, yawan ƙarfin da zai iya adanawa. Inductor, a gefe guda, suna adana makamashi a cikin nau'in filin maganadisu. Mafi girman ƙarfin maganadisu na inductor core, mafi girman inductance, da ƙarin kuzarin da za'a iya adanawa.
4) Canjin Canzawa:
Kashe-grid tsarin juyawa yadda ya dace ya haɗa da bangarori biyu, ɗayan shine ingancin injin kanta, kashe-grid inverter circuit yana da rikitarwa, don tafiya ta hanyar jujjuya matakai da yawa, don haka ƙimar gabaɗaya ta ɗan ƙasa kaɗan fiye da inverter mai haɗin grid, gabaɗaya tsakanin 80-90%, mafi girman ƙarfin injin inverter yadda ya dace, mafi girman ƙarfin lantarki mafi girma fiye da tsarin wutar lantarki mafi girma inganci kuma ya fi girma. Na biyu, ingancin caji da cajin baturi, wannan shine nau'in baturi yana da dangantaka, lokacin da samar da wutar lantarki na photovoltaic da aiki tare da wutar lantarki, photovoltaic na iya samar da nauyin da za a yi amfani da shi kai tsaye, ba tare da buƙatar shiga ta hanyar canza baturi ba.
5) Lokacin canjawa:
Kashe-grid tsarin tare da kaya, akwai PV, baturi, mai amfani yanayi uku, lokacin da baturi bai isa ba, canjawa zuwa yanayin amfani, akwai lokacin sauyawa, wasu kashe-grid inverters amfani da lantarki sauya sauyawa, lokaci a cikin 10 millise seconds, tebur kwamfuta ba zai rufe, lighting ba zai flicker. Wasu na'urorin inverters na kashe-grid suna amfani da juyawa na relay, lokacin zai iya zama fiye da 20 millise seconds, kuma kwamfutar tebur na iya rufewa ko ta sake farawa.