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, gyare-gyaren raƙuman ruwa, fitarwa na sine.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. Ayyukan farawa a hankali don kauce 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
Lokacin zabar inverter na kashe-grid, ban da kula da yanayin fitarwa da nau'in keɓancewa na inverter, akwai sigogin fasaha da yawa waɗanda suma suna da mahimmanci, kamar wutar lantarki na tsarin, ƙarfin fitarwa, ƙarfin kololuwa, ingantaccen juzu'i, canjin lokaci, da dai sauransu Zaɓin waɗannan sigogi yana da tasiri sosai akan buƙatun wutar lantarki.
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, ɗayan shine bayyanannen ikon magana, naúrar ita ce VA, wannan shine alamar UPS, ainihin ƙarfin fitarwa mai aiki shima yana buƙatar ninka ƙarfin wutar lantarki, kamar 500VA kashe-grid inverter. , Matsakaicin wutar lantarki shine 0.8, ainihin kayan aiki mai aiki shine 400W, wato, zai iya fitar da nauyin tsayayyar 400W, irin su fitilun lantarki, masu dafa abinci, 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 lodi, wasu inductive lodi, kamar kwandishan, famfo, da dai sauransu, da mota ciki, da ikon farawa shine sau 3-5 akan ƙimar wutar lantarki, don haka inverter na kashe-grid yana da buƙatu na musamman don ɗaukar nauyi.Ƙarfin kololuwa ita ce ƙarfin lodin mai inverter na 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 dukkansu abubuwa ne na ajiyar makamashi, amma bambancin shine cewa capacitors na adana makamashin lantarki a cikin nau'in wutar 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:
Ingantaccen tsarin jujjuyawar kashe-grid ya haɗa da bangarori biyu, ɗaya shine ingancin injin kanta, kashe-grid inverter circuit yana da wahala, 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 ƙarfin injin inverter, keɓancewa mai girma fiye da ƙimar keɓancewar mitar ya fi girma, mafi girman ingancin ƙarfin wutar lantarki shima ya fi girma.Na biyu, ingancin cajin baturi 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 ba da kayan aiki kai tsaye don amfani, ba tare da buƙatar shiga ta hanyar canza baturi ba.
5) Lokacin canjawa:
Kashe-grid tsarin tare da kaya, akwai PV, baturi, mai amfani uku halaye, lokacin da baturi bai isa ba, canzawa zuwa mai amfani yanayin, akwai lokacin sauyawa, wasu kashe-grid inverters amfani da lantarki sauya sauyawa, lokaci a cikin 10 millise seconds, kwamfutocin tebur ba za su rufe ba, hasken wuta ba zai yi kyalli ba.Wasu na'urorin inverters na kashe-grid suna amfani da sauyawa na relay, lokacin yana iya zama fiye da 20 millise seconds, kuma kwamfutar tebur na iya rufewa ko ta sake farawa.