Ezinhlelweni ezintsha ze-photovoltaic zamandla, isiguquli sesitoreji samandla (PCS) siyihabhu eyinhloko yokuguqulwa okusebenzayo kwamandla e-photovoltaic DC abe amandla egridi ye-AC. Ama-capacitor amafilimu e-YMIN, anokumelana kwawo namazinga aphezulu kagesi, ukulahlekelwa okuphansi, nempilo ende, ayizici ezibalulekile zokuthuthukisa ukusebenza kwama-inverters e-PCS e-photovoltaic, okusiza izitshalo zamandla e-photovoltaic zithole ukuguqulwa kwamandla okuphumelelayo kanye nokukhishwa okuzinzile. Imisebenzi yabo eyinhloko kanye nezinzuzo zezobuchwepheshe zimi kanje:
1. "Isivikelo Sokuzinza kweVoltage" se-DC-Link
Ngesikhathi senqubo yokuguqulwa kwe-AC-DC kuma-inverter e-PCS e-photovoltaic, ibhasi le-DC (DC-Link) lingaphansi kwama-pulse currents aphezulu kanye nama-voltage spikes. Ama-capacitor amafilimu e-YMIN ahlinzeka ngalezi zinzuzo ngokuthi:
• I-High-Voltage Surge Absorption: Ngokumelana nama-voltage aphezulu angu-500V kuya ku-1500V (okwenziwa ngokwezifiso), amunca ama-voltage esikhashana akhiqizwa amaswishi e-IGBT/SiC, avikela amadivayisi kagesi ezingozini zokuwohloka.
• I-ESR Yamanje Yokushelela Okuthambile: I-ESR Ephansi (1/10 yama-aluminum electrolytic capacitor) imunca kahle i-high-frequency ripple current ku-DC-Link, yehlise ukulahleka kwamandla futhi ithuthukise ukusebenza kahle kokuguqulwa kwamandla.
• Isigcinamandla Sesitoreji Samandla Esikhulu Esiphezulu: Ibanga elibanzi lamandla livumela ukushaja okusheshayo nokushajwa phakathi nokuguquguquka kwamandla kagesi wegridi, ukugcina ukuqina kwamandla kagesi webhasi le-DC nokuqinisekisa ukusebenza okuqhubekayo kwe-PCS.
2. Ukuvikelwa Okukabili Kokumelana Nokushisa Okuphezulu Nokuzinza Kwezinga Lokushisa
Iziteshi zikagesi ze-PV zivame ukubhekana nezimo ezinzima ezifana nezinga lokushisa eliphezulu kanye nomswakama ophezulu. Ama-capacitor amafilimu e-YMIN ahlangabezana nalezi zinselelo ngemiklamo emisha:
• Ukusebenza Okuzinzile Ebangeni Lokushisa Elibanzi: Amazinga okushisa asebenzayo amboza -40°C kuya ku-105°C, ngezinga lokuwohloka kwe-capacitance elingaphansi kuka-5% ezindaweni ezishisa kakhulu, okuvimbela ukwehla kwesistimu ngenxa yokushintshashintsha kwezinga lokushisa.
• Umthamo Wamanje We-Ripple: Ikhono lokuphatha lamanje le-Ripple lingaphezu kwezikhathi ezingu-10 zama-electrolytic capacitor, ukuhlunga ngokuphumelelayo umsindo we-harmonic ekuphumeni kwe-PV nokuqinisekisa ikhwalithi yamandla axhunywe kugridi ihlangabezana nezindinganiso zikazwelonke.
• Ukuphila Okude Nokugcinwa Kwamahhala: Ngokuphila isikhathi esingafika kumahora angu-100,000, okwedlula kude amahora angu-30,000-50,000 we-aluminium electrolytic capacitor, lokhu kunciphisa izindleko zokusebenza nokugcinwa kwezitshalo zamandla e-photovoltaic.
3. Ukusebenzisana namadivayisi we-SiC/IGBT
Njengoba izinhlelo ze-photovoltaic ziguqukela kuma-voltage aphezulu (izakhiwo eziyi-1500V ziba yinsakavukela), ama-capacitor efilimu emincane ye-YMIN ahambisana ngokujulile nama-semiconductors wamandla esizukulwane esilandelayo:
• Usekelo Lokushintsha Imvamisa Ephakeme: Idizayini ye-low-inductance ifana nezici zemvamisa ephezulu ye-SiC MOSFETs (imvamisa yokushintsha > 20kHz), inciphisa inani lezingxenye ze-passive futhi inikele ekuncipheni okuncane kwezinhlelo ze-PCS (uhlelo lwe-40kW ludinga kuphela ama-capacitor angu-8, uma kuqhathaniswa nama-22 wezixazululo ezisekelwe ku-silicon).
• Ukumelana ne-dv/dt okuthuthukisiwe: Ukuzivumelanisa nezimo okuthuthukisiwe ezinguqukweni zamandla kagesi, ukuvimbela ukuzungeza kwamandla kagesi okubangelwa isivinini sokushintsha ngokweqile kumadivayisi we-SiC.
4. Inani Lezinga Lesistimu: Ukusebenza Kamandla Okuthuthukisiwe kanye Nokuthuthukisa Izindleko
• Ukusebenza Okuthuthukisiwe: Idizayini ye-ESR ephansi inciphisa ukulahlekelwa ukushisa, ikhuphule ukusebenza kahle kwe-PCS iyonke futhi ikhulise ngokuphawulekayo ukukhiqizwa kwamandla konyaka.
• Ukonga Isikhala: Idizayini ephezulu yokuminyana kwamandla (ama-40% amancane kunama-capacitor avamile) isekela ukwakheka kwezinto ezihlangene ze-PCS futhi yehlisa izindleko zokuyifaka.
Isiphetho
Ama-capacitor amafilimu e-YMIN, anezinzuzo zawo eziyinhloko zokubekezelela i-voltage ephezulu, ukukhuphuka kwezinga lokushisa eliphansi, nokugcinwa okungu-zero, ahlanganiswe ngokujulile ezicini eziyinhloko zama-inverter e-photovoltaic PCS, okuhlanganisa ukubhafa kwe-DC-Link, ukuvikelwa kwe-IGBT, nokuhlunga kwegridi ye-harmonic. Basebenza "njengomnakekeli ongabonakali" wokusebenza okuphumelelayo nokuzinzile ezitshalweni zamandla e-photovoltaic. Ubuchwepheshe babo abugcini nje ngokushayela amasistimu okugcina amandla e-photovoltaic aye “ekungagcinwani kwawo kuwo wonke umjikelezo wabo wokuphila,” kodwa futhi kusiza imboni yamandla entsha ukuthi isheshise ukuzuza kokulingana kwegridi kanye noshintsho lwe-zero-carbon.
Isikhathi sokuthumela: Aug-14-2025