N'ime sistemụ fotovoltaic ike ọhụrụ, ihe mgbanwe nchekwa ike (PCS) bụ isi ihe maka ịgbanwe ike fotovoltaic DC ka ọ bụrụ ike AC grid. Ndị na-eme ka ike YMIN dị elu, ha nwere nnukwu ike iguzogide voltaji, obere mfu, na ogologo ndụ, bụ ihe ndị dị mkpa maka ime ka arụmọrụ nke inverters PCS photovoltaic dịkwuo mma, na-enyere osisi ike photovoltaic aka inweta mgbanwe ike dị irè na mmepụta kwụsiri ike. Ọrụ ha bụ isi na uru teknụzụ bụ ndị a:
1. "Ihe nchekwa ike voltaji" maka DC-Link
N'oge usoro ntụgharị AC-DC na inverters PCS photovoltaic, bọs DC (DC-Link) na-enwe ike ịnweta oke ọkụ na voltaji. YMIN film capacitors na-enye uru ndị a site na:
• Mbuli elu nke voltaji: Ha na-eguzogide nnukwu voltaji nke 500V ruo 1500V (a pụrụ ịhazi ya), ha na-amịkọrọ obere voltaji ndị na-adịghị agbanwe agbanwe nke swiitị IGBT/SiC na-emepụta, na-echebe ngwaọrụ ike site na ihe egwu mmebi.
• Mbelata ESR Ugbu a Dị Ala: ESR dị ala (1/10 nke ihe ndị na-eme ka aluminom electrolytic capacitors) na-amịkọrọ ike ripple ugboro ugboro dị elu na DC-Link nke ọma, na-ebelata mfu ike ma na-eme ka arụmọrụ mgbanwe ike ka mma.
• Nchekwa Ike Dị Elu: Oke ikike dị ukwuu na-enye ohere maka ịchaji na iwepụ ngwa ngwa n'oge mgbanwe voltaji grid, na-eme ka voltaji DC kwụsie ike ma na-ahụ na PCS na-arụ ọrụ na-aga n'ihu.
2. Nchekwa Abụọ nke Ike Ike Voltaji Dị Elu na Ịkwụsi Ike n'Okpomọkụ
Ọdụ ọkụ eletrik PV na-echekarị ihu gburugburu ebe siri ike dịka oke okpomọkụ na oke iru mmiri. Ihe nchekwa ihe nkiri YMIN na-ezute ihe ịma aka ndị a site na imepụta ihe ọhụrụ:
• Ọrụ Na-adịgide Adịgide n'Oke Okpomọkụ: Okpomọkụ Ọrụ Na-ekpuchi -40°C ruo 105°C, yana ọnụego mmebi nke capacitance nke na-erughị 5% na gburugburu okpomọkụ dị elu, na-egbochi oge ọrụ sistemụ n'ihi mgbanwe okpomọkụ.
• Ike Ripple Current: Ike njikwa Ripple current karịrị ugboro iri nke capacitors electrolytic ọdịnala, na-enyocha mkpọtụ harmonic nke ọma na mmepụta PV ma na-ahụ na ịdị mma ike ejikọtara na grid ruru ụkpụrụ mba.
• Ogologo Ndụ na Nchekwa-Enweghị: Site na ndụ ruo awa 100,000, nke karịrị awa 30,000-50,000 nke aluminom electrolytic capacitors, nke a na-ebelata ọnụ ahịa ọrụ na mmezi nke osisi ike photovoltaic.
3. Mmekọrịta na Ngwaọrụ SiC/IGBT
Ka sistemụ fotovoltaic na-agbanwe gaa na voltaji dị elu (usoro nhazi 1500V na-aghọ ihe a na-ahụkarị), YMIN thinner-film capacitors dakọtara nke ọma na semiconductor ike ọgbọ na-abịa:
• Nkwado Mgbanwe Ugboro Dị Elu: Nhazi obere inductance dabara na njirimara ugboro ugboro dị elu nke SiC MOSFETs (ugboro mgbanwe > 20kHz), na-ebelata ọnụọgụ nke ihe ndị na-adịghị arụ ọrụ ma na-enye aka na obere nhazi nke sistemụ PCS (usoro 40kW chọrọ naanị capacitors 8, ma e jiri ya tụnyere 22 maka ngwọta dabere na silicon).
• Mmeziwanye DV/DT Na-eguzogide: Mmeziwanye mgbanwe voltaji, na-egbochi mgbanwe voltaji nke oke ọsọ mgbanwe na ngwaọrụ SiC kpatara.
4. Uru Ọkwa Sistemụ: Mmeziwanye Ọrụ Ike na Nhazi Ọnụego
• Mmezi Ka Mma: Nhazi ESR dị ala na-ebelata mfu okpomọkụ, na-eme ka arụmọrụ PCS dịkwuo elu ma na-amụba mmepụta ike kwa afọ nke ukwuu.
• Nchekwa oghere: Nhazi ike dị elu (40% pere mpe karịa capacitors ọdịnala) na-akwado nhazi akụrụngwa PCS dị obere ma na-ebelata ọnụ ahịa nrụnye.
Mmechi
Ndị na-etinye ihe nkiri YMIN, nke nwere uru dị mkpa dịka oke ike voltaji, mmụba okpomọkụ dị ala, na enweghị mmezi, ejikọtara ya nke ọma n'ime akụkụ dị mkpa nke inverters PCS photovoltaic, gụnyere nchekwa DC-Link, nchedo IGBT, na nzacha harmonic grid. Ha na-eje ozi dị ka "onye nche a na-adịghị ahụ anya" nke ọrụ dị irè na nke kwụsiri ike na osisi ike photovoltaic. Teknụzụ ha abụghị naanị na-akpali sistemụ nchekwa ike photovoltaic gaa na "enweghị mmezi n'oge ndụ ha niile," kamakwa ọ na-enyere ụlọ ọrụ ike ọhụrụ aka ime ngwa ngwa nke nha nha grid na mgbanwe efu-carbon.
Oge ozi: Ọgọst-14-2025