Amakuru

Mubyongeyeho, ibirango byibutswe muri Ositaraliya nabyo birimo:

DC ihindura GWR PTY LTD Ubucuruzi nka Uniquip Industries yaributswe kubera ubushyuhe n'umuriro: http://www.recalls.gov.au/content/index.phtml/itemId/1060436

NHP Electrical Engineering Products Pty Ltd's DC ihindura, impamvu yo kwibuka ni uko iyo ikiganza gihinduwe muri leta ya'OFF ', ariko umubonano uhora muburyo bwa'ON', kandi sisitemu ntishobora kuzimya: http: //www.ibisobanuro.gov.au/ ibirimo / indangagaciro.phtml / ikintuId / 1055934

Kugeza ubu, hari byinshi bita DC yamashanyarazi kumasoko ntabwo ari DC yamashanyarazi, ariko byatejwe imbere na AC yamashanyarazi.Sisitemu ya Photovoltaque muri rusange ifite umuyaga mwinshi ugereranije na voltage.Mugihe habaye ikosa ryubutaka, umuyoboro mugufi-wumuzunguruko uzakurura imikoranire hamwe, bikavamo umuyoboro muremure cyane, ushobora kuba muremure nka kiloamps (bitewe nibicuruzwa bitandukanye).Cyane cyane muri sisitemu ya Photovoltaque, birasanzwe ko habaho ibintu byinshi bisa byinjiza imirasire yizuba cyangwa kwigenga kwizuba ryinshi.Muri ubu buryo, birakenewe ko uhagarika icyerekezo cya DC cyinjiza imirasire y'izuba myinshi cyangwa DC yigenga yinjiza izuba ryinshi icyarimwe.Ubushobozi bwo kuzimya arc bwa DC ihindura muribi bihe Ibisabwa bizaba byinshi, kandi imikoreshereze yibi bikoresho bya DC yamashanyarazi muri sisitemu ya Photovoltaque bizagira ingaruka zikomeye.

Guhitamo neza kwamahame menshi ya DC

Nigute ushobora guhitamo iburyo bwa DC kuri sisitemu ya Photovoltaque?Ibipimo bikurikira birashobora gukoreshwa nkibisobanuro:

1. Gerageza guhitamo ibirango binini, cyane cyane byatsinze ibyemezo mpuzamahanga.

Amashanyarazi yamashanyarazi ya DC afite cyane cyane ibyemezo byuburayi IEC 60947-3 (bisanzwe muburayi, bikurikirwa nibihugu byinshi muri Aziya-pasifika), UL 508 (igipimo rusange cyabanyamerika), UL508i (igipimo cyabanyamerika kuri DC ihindura sisitemu ya fotora), GB14048.3 .Ibirango byinshi murugo ubu birenga gusa IEC 60947-3.

2. Hitamo DC yamashanyarazi hamwe nibikorwa byiza byo kuzimya arc.

Ingaruka yo kuzimya arc nimwe mubimenyetso byingenzi byo gusuzuma DC ihinduka.Imashanyarazi ya DC nyayo ifite ibikoresho byihariye byo kuzimya arc, bishobora kuzimya umutwaro.Mubisanzwe, igishushanyo mbonera cyimiterere ya DC yameneka ni umwihariko.Igikoresho hamwe nuguhuza ntabwo bihujwe neza, iyo rero iyo switch ifunguye kandi ikazimya, itumanaho ntirizunguruka kugirango rihagarike, ariko isoko idasanzwe ikoreshwa muguhuza.Iyo ikiganza kizunguruka cyangwa cyimukiye Ku kintu runaka, imibonano yose itera "gufungura giturumbuka", bityo bikabyara ibikorwa byihuse cyane, bigatuma arc imara igihe gito.Mubisanzwe, arc ya fotovoltaque DC ihinduranya kumurongo wambere wumurongo wambere uzimya muri milisegonda nkeya.Kurugero, SI sisitemu ya IMO ivuga ko arc yazimye muri milisegonda 5.Ariko, arc ya DC yamashanyarazi yahinduwe na rusange yamashanyarazi ya AC imara milisegonda zirenga 100.

3. Ihangane na voltage nini hamwe nubu.

Umuvuduko wa sisitemu rusange yifotora irashobora kugera kuri 1000V (600V muri Reta zunzubumwe zamerika), kandi ikigezweho kigomba guhagarikwa biterwa nikirango nimbaraga za module, kandi niba sisitemu ya fotokoltaque ihujwe muburyo bumwe cyangwa bwinshi bwigenga ( imiyoboro myinshi MPPT).Umuvuduko wa voltage numuyoboro wa DC bigenwa numugozi wa voltage hamwe nuburinganire bwumurongo wamafoto akeneye guhagarikwa.Reba uburambe bukurikira muguhitamo amashanyarazi yamashanyarazi ya DC:

Umuvuduko = NS x VOC x 1.15 (Ikigereranyo cya 1.1)

Ibiriho = NP x ISC x 1.25 (Formula 1.2)

Aho NS-umubare wibikoresho bya batiri murukurikirane NP-umubare wamapaki ya batiri murwego rumwe

VOC-bateri ikingura amashanyarazi yumuzunguruko

ISC-bigufi byumuzunguruko wumurongo wa batiri

1.15 na 1.25 ni coefficient zifatika

Mubisanzwe, DC ihinduranya ibirango byingenzi birashobora guhagarika sisitemu ya DC ya 1000V, ndetse igashushanya guhagarika DC yinjiza 1500V.Ibirango binini bya DC byahinduwe akenshi bifite urukurikirane rwimbaraga.Kurugero, fotokolta ya ABB ya DC ifite ibicuruzwa bya ampere amagana.IMO yibanda kuri DC ya sisitemu yo gukwirakwiza amashanyarazi kandi irashobora gutanga 50A, 1500V DC.Nyamara, bamwe mubakora inganda ntoya batanga gusa 16A, 25A DC, kandi tekinoroji nikoranabuhanga biragoye kubyara amashanyarazi menshi ya DC.

4. Icyitegererezo cyibicuruzwa kiruzuye.

Mubisanzwe, ibirango binini bya DC byahinduwe bifite moderi zitandukanye zishobora guhuza ibikenewe mubihe bitandukanye.Hano hari hanze, yubatswe, itumanaho rishobora guhura ninjiza nyinshi za MPPT murukurikirane kandi iringaniye, hamwe na bidafunze, kandi biranyuze.Kwishyiriraho uburyo butandukanye nko kwishyiriraho shingiro (ushyizwe mumasanduku ya kombine hamwe nogukwirakwiza amashanyarazi), umwobo umwe hamwe no gushiraho panel, nibindi.

5. Ibikoresho ni flame-retardant kandi bifite uburinzi bwo hejuru.

Mubisanzwe, amazu, ibikoresho byumubiri, cyangwa ikiganza cya DC byahinduwe byose ni plastike, ifite ibiranga flame-retardant kandi mubisanzwe byujuje ubuziranenge bwa UL94.Ikariso cyangwa umubiri wa DC nziza-nziza irashobora guhura na UL 94V0, kandi ikiganza muri rusange gihura na UL94 V-2.

Icya kabiri, kubintu byubatswe muri DC imbere muri inverter, niba hari ikiganza cyo hanze gishobora guhindurwa, urwego rwo kurinda ibintu rusabwa muri rusange kugirango byibuze byuzuze ibisabwa kugirango urwego rwo kurinda imashini yose.Kugeza ubu, inverteri ikoreshwa cyane muruganda (muri rusange munsi ya 30kW yingufu) murwego rusanzwe rwuzuza urwego rwa IP65 rwo kurinda imashini yose, bisaba ko rwinjizwamo DC hamwe no gukomera kumwanya mugihe imashini yashizwemo .Kuri DC yo hanze, niba yashyizwe hanze, basabwa kuzuza byibuze urwego rwo kurinda IP65.