YMIN Film Capacitors: Cov Khoom Siv Hluav Taws Xob Zoo Rau Cov Inverters Photovoltaic PCS

Hauv cov tshuab photovoltaic tshiab, lub tshuab hloov hluav taws xob (PCS) yog lub hauv paus tseem ceeb rau kev hloov pauv hluav taws xob DC photovoltaic mus rau hauv lub zog AC grid. Cov capacitors zaj duab xis YMIN, nrog lawv qhov kev tiv thaiv hluav taws xob siab, kev poob qis, thiab lub neej ntev, yog cov khoom tseem ceeb rau kev txhim kho kev ua haujlwm ntawm photovoltaic PCS inverters, pab cov chaw tsim hluav taws xob photovoltaic ua tiav kev hloov pauv hluav taws xob zoo thiab cov zis ruaj khov. Lawv cov haujlwm tseem ceeb thiab cov txiaj ntsig kev siv tshuab yog raws li nram no:

1. "Voltage Stabilisation Shield" rau DC-Link

Thaum lub sijhawm hloov AC-DC hauv cov photovoltaic PCS inverters, lub tsheb npav DC (DC-Link) raug rau cov hluav taws xob siab thiab cov hluav taws xob nce siab. YMIN zaj duab xis capacitors muab cov txiaj ntsig no los ntawm:

• Kev Nqus Tau Hluav Taws Xob Siab: Txawm hais tias muaj hluav taws xob siab ntawm 500V txog 1500V (kho tau), lawv nqus tau cov hluav taws xob siab uas tsim los ntawm IGBT/SiC switches, tiv thaiv cov khoom siv fais fab los ntawm kev pheej hmoo tawg.

• Kev Ua Kom Tam Sim No Tsis Muaj ESR Qis: ESR Qis (1/10 ntawm cov capacitors electrolytic aluminium ib txwm muaj) nqus tau cov tam sim no ntawm DC-Link zoo heev, txo qhov poob hluav taws xob thiab txhim kho kev hloov pauv hluav taws xob zoo.

• Lub Chaw Khaws Cia Hluav Taws Xob Muaj Peev Xwm Loj: Muaj ntau qhov peev xwm ua rau them thiab tso tawm sai thaum muaj hluav taws xob hloov pauv, tswj hwm qhov hluav taws xob DC bus ruaj khov thiab ua kom PCS ua haujlwm tas mus li.

2. Kev Tiv Thaiv Ob Chav ntawm High Voltage Withstand thiab Kub Stability

Cov chaw tsim hluav taws xob PV feem ntau ntsib cov chaw ib puag ncig hnyav xws li kub thiab av noo siab. YMIN zaj duab xis capacitors ua tau raws li cov teeb meem no los ntawm kev tsim kho tshiab:

• Kev Ua Haujlwm Ruaj Khov ntawm Qhov Kub Dav Dav: Qhov kub ua haujlwm npog -40°C txog 105°C, nrog rau qhov txo qis ntawm lub peev xwm tsawg dua 5% hauv qhov chaw kub siab, tiv thaiv lub sijhawm tsis ua haujlwm vim qhov kub hloov pauv.

• Muaj Peev Xwm Ripple Current: Muaj peev xwm tswj tau Ripple current ntau dua 10 npaug ntawm cov electrolytic capacitors ib txwm muaj, lim tau suab nrov harmonic ntawm cov zis PV thiab ua kom lub zog txuas nrog grid zoo raws li cov qauv hauv tebchaws.

• Lub Neej Ntev thiab Tsis Tas Yuav Kho: Nrog lub neej ntev txog li 100,000 teev, ntau dua li 30,000-50,000 teev ntawm cov txhuas electrolytic capacitors, qhov no txo ​​cov nqi khiav lag luam thiab kev saib xyuas ntawm cov chaw tsim hluav taws xob photovoltaic.

3. Kev sib koom tes nrog SiC / IGBT Cov Khoom Siv

Raws li cov tshuab photovoltaic hloov zuj zus mus rau qhov muaj hluav taws xob siab dua (1500V architectures dhau los ua mainstream), YMIN thin-film capacitors sib xws nrog cov tiam tom ntej power semiconductors:

• Kev Txhawb Nqa Kev Hloov Zaus Siab: Tus qauv tsim qis-inductance phim cov yam ntxwv siab-zaus ntawm SiC MOSFETs (hloov zaus> 20kHz), txo cov naj npawb ntawm cov khoom tsis siv neeg thiab pab txhawb rau qhov me me ntawm PCS systems (lub kaw lus 40kW tsuas yog xav tau 8 lub capacitors, piv rau 22 rau cov kev daws teeb meem raws li silicon).

• Txhim kho dv/dt Withstand: Txhim kho kev hloov pauv voltage, tiv thaiv kev oscillations voltage los ntawm kev hloov pauv ceev dhau hauv SiC li.

4. Tus Nqi Qib System: Kev Txhim Kho Kev Siv Hluav Taws Xob Zoo Dua thiab Kev Txhim Kho Tus Nqi

• Kev Ua Haujlwm Zoo Dua: Tus qauv tsim ESR qis txo qhov poob cua sov, ua rau PCS ua haujlwm tau zoo dua thiab ua rau muaj zog ntau ntxiv txhua xyoo.

• Txuag Chaw: Tsim kom muaj zog ntau (me dua 40% dua li cov capacitors ib txwm muaj) txhawb nqa cov khoom siv PCS compact thiab txo cov nqi teeb tsa.

Xaus lus

Cov YMIN zaj duab xis capacitors, nrog lawv cov txiaj ntsig tseem ceeb ntawm kev ua siab ntev ntawm qhov hluav taws xob siab, qhov kub qis nce, thiab xoom kev saib xyuas, tau koom ua ke tob rau hauv cov ntsiab lus tseem ceeb ntawm photovoltaic PCS inverters, suav nrog DC-Link buffering, IGBT kev tiv thaiv, thiab grid harmonic filtering. Lawv ua haujlwm ua "tus saib xyuas tsis pom" ntawm kev ua haujlwm zoo thiab ruaj khov hauv cov chaw tsim hluav taws xob photovoltaic. Lawv cov thev naus laus zis tsis yog tsuas yog tsav cov tshuab khaws cia hluav taws xob photovoltaic mus rau "kev saib xyuas-dawb thoob plaws lawv lub neej voj voog," tab sis kuj pab kev lag luam hluav taws xob tshiab ua kom nrawm dua ntawm grid parity thiab xoom-carbon hloov pauv.