Mu machitidwe atsopano a mphamvu ya photovoltaic, chosinthira mphamvu chosungira mphamvu (PCS) ndiye malo ofunikira kwambiri osinthira bwino mphamvu ya photovoltaic DC kukhala mphamvu ya grid AC. Ma capacitor a YMIN film, omwe ali ndi mphamvu zambiri zotsutsana ndi magetsi, kutayika kochepa, komanso moyo wautali, ndi zinthu zofunika kwambiri pakukweza magwiridwe antchito a ma inverter a photovoltaic PCS, kuthandiza malo opangira magetsi a photovoltaic kuti asinthe mphamvu moyenera komanso kuti atulutse mphamvu mokhazikika. Ntchito zawo zazikulu ndi zabwino zake ndi izi:
1. "Chitetezo cha Kukhazikika kwa Voltage" cha DC-Link
Pa nthawi yosinthira AC-DC mu ma inverter a photovoltaic PCS, DC bus (DC-Link) imakhala ndi ma pulse currents okwera komanso ma voltage spikes. Ma capacitor a YMIN film amapereka maubwino awa mwa:
• Kuchuluka kwa Mphamvu Yowonjezera Mphamvu: Pokhala ndi mphamvu yowonjezereka ya 500V mpaka 1500V (yosinthika), imayamwa mphamvu yocheperako yamagetsi yopangidwa ndi ma switch a IGBT/SiC, kuteteza zida zamagetsi ku zoopsa zosweka.
• Kuchepetsa Mphamvu ya ESR Yotsika: ESR Yotsika (1/10 ya ma capacitor a aluminiyamu achikhalidwe) imayamwa bwino mphamvu ya ripple yamagetsi yamagetsi pa DC-Link, kuchepetsa kutayika kwa mphamvu ndikuwonjezera mphamvu yosinthira mphamvu.
• Mphamvu Yosungira Mphamvu Yokhala ndi Mphamvu Yambiri: Kuchuluka kwa mphamvu zomwe zingagwiritsidwe ntchito kumalola kuti magetsi azichajidwa mwachangu komanso kutulutsa mphamvu panthawi ya kusintha kwa magetsi a gridi, kusunga mphamvu yamagetsi ya basi ya DC ndikuwonetsetsa kuti PCS ikugwira ntchito mosalekeza.
2. Chitetezo Chachiwiri cha Kupirira kwa Voltage Yaikulu ndi Kukhazikika kwa Kutentha
Malo opangira magetsi a PV nthawi zambiri amakumana ndi malo ovuta monga kutentha kwambiri komanso chinyezi chambiri. Ma capacitor a YMIN amakumana ndi mavutowa kudzera mu mapangidwe atsopano:
• Kugwira Ntchito Kokhazikika Pamalo Otentha Kwambiri: Kutentha kwa ntchito kumafikira -40°C mpaka 105°C, ndi kuchuluka kwa mphamvu yochepetsera mphamvu yochepera 5% m'malo otentha kwambiri, zomwe zimaletsa nthawi yogwira ntchito chifukwa cha kusinthasintha kwa kutentha.
• Mphamvu ya Ripple Current: Mphamvu yogwiritsira ntchito Ripple current ndi yoposa nthawi 10 kuposa ya ma capacitor achikhalidwe a electrolytic, zomwe zimasefa bwino phokoso la harmonic pa PV output ndikuwonetsetsa kuti mphamvu yolumikizidwa ndi grid ikukwaniritsa miyezo ya dziko.
• Moyo Wautali Ndi Wopanda Kukonza: Ndi moyo wa maola okwana 100,000, woposa maola 30,000-50,000 a aluminiyamu electrolytic capacitors, izi zimachepetsa ndalama zogwirira ntchito ndi kukonza zomera zamagetsi za photovoltaic.
3. Kugwirizana ndi Zida za SiC/IGBT
Pamene makina a photovoltaic akusintha kupita ku ma voltage okwera (mapangidwe a 1500V akukhala otchuka), ma capacitor a YMIN thin-film amagwirizana kwambiri ndi ma semiconductor amphamvu a m'badwo wotsatira:
• Thandizo la Kusinthana kwa Ma Frequency Ambiri: Kapangidwe kake kotsika ka inductance kakugwirizana ndi mawonekedwe a ma frequency apamwamba a SiC MOSFETs (kusinthana kwa ma frequency > 20kHz), kuchepetsa kuchuluka kwa zinthu zopanda ntchito komanso kuthandizira kuchepetsa mphamvu ya PCS systems (dongosolo la 40kW limafuna ma capacitor 8 okha, poyerekeza ndi 22 pa mayankho ozikidwa pa silicon).
• Kupirira bwino kwa dv/dt: Kusinthasintha kwamphamvu ku kusintha kwa magetsi, kuteteza kusinthasintha kwa magetsi komwe kumachitika chifukwa cha liwiro lalikulu la kusintha kwa magetsi mu zida za SiC.
4. Mtengo wa Dongosolo: Kugwiritsa Ntchito Mphamvu Mwanzeru ndi Kukonza Ndalama
• Kugwira Ntchito Mwanzeru: Kapangidwe kake kochepa ka ESR kamachepetsa kutaya kutentha, kukulitsa mphamvu zonse za PCS komanso kukulitsa kwambiri kupanga mphamvu pachaka.
• Kusunga Malo: Kapangidwe ka mphamvu zambiri (kakang'ono ka 40% kuposa ma capacitor achikhalidwe) kamathandizira kapangidwe ka zida za PCS zazing'ono ndipo kumachepetsa ndalama zoyikira.
Mapeto
Ma capacitor a YMIN, omwe ali ndi ubwino waukulu wa kupirira mphamvu zamagetsi, kukwera kwa kutentha kochepa, komanso kusakonza bwino, amaphatikizidwa kwambiri m'magawo ofunikira a inverters a photovoltaic PCS, kuphatikiza DC-Link buffering, chitetezo cha IGBT, ndi kusefa kwa grid harmonic. Amagwira ntchito ngati "woteteza wosawoneka" wa magwiridwe antchito abwino komanso okhazikika m'mafakitale amagetsi a photovoltaic. Ukadaulo wawo sumangoyendetsa makina osungira mphamvu a photovoltaic kuti "asakonze nthawi yonse ya moyo wawo," komanso umathandiza makampani atsopano amagetsi kufulumizitsa kukwaniritsa grid parity ndi kusintha kwa zero-carbon.
Nthawi yotumizira: Ogasiti-14-2025