Ii-Capacitors zefilimu ze-YMIN: IziQinisekiso zeVoltage ezisebenzayo kakhulu kwii-Inverters ze-Photovoltaic PCS

Kwiinkqubo ezintsha ze-photovoltaic zamandla, i-power storage converter (PCS) yeyona ndawo iphambili yokuguqula ngokufanelekileyo amandla e-photovoltaic DC abe ngamandla e-grid AC. Ii-capacitor zefilimu ze-YMIN, ezinokumelana nombane ophezulu, ilahleko ephantsi, kunye nobomi obude, zizinto ezibalulekileyo zokuphucula ukusebenza kwee-inverters ze-photovoltaic PCS, zinceda izityalo zamandla ze-photovoltaic zifezekise ukuguqulwa kwamandla okusebenzayo kunye nemveliso ezinzileyo. Imisebenzi yazo ephambili kunye neenzuzo zobugcisa zezi zilandelayo:

1. "Isihlangu sokuzinzisa iVoltage" seDC-Link

Ngexesha lenkqubo yokuguqulwa kwe-AC-DC kwii-inverters ze-PCS ze-photovoltaic, ibhasi ye-DC (DC-Link) ixhomekeke kwimijelo ye-pulse ephezulu kunye ne-voltage spikes. Ii-capacitors zefilimu ze-YMIN zibonelela ngezi zibonelelo ngoku:

• Ukufunxwa koMbane oPhezulu: Ukumelana nombane ophezulu ukusuka kwi-500V ukuya kwi-1500V (okunokwenzeka ngokwezifiso), zifunxa ii-spikes zombane ezidlulayo eziveliswa ziiswitshi ze-IGBT/SiC, zikhusela izixhobo zamandla kwiingozi zokuqhekeka.

• Ukuthambisa umbane we-ESR ephantsi: I-ESR ephantsi (1/10 efana neyee-capacitors ze-aluminium zemveli) ifunxa ngokufanelekileyo umbane we-ripple ojikelezayo ophezulu kwi-DC-Link, inciphisa ukulahleka kwamandla kwaye iphucula ukusebenza kakuhle kokuguqulwa kwamandla.

• I-High-Capacity Energy Storage Buffer: Uluhlu olubanzi lomthamo luvumela ukutshaja nokukhupha ngokukhawuleza ngexesha lokuguquguquka kwe-voltage yegridi, ukugcina uzinzo lwe-voltage yebhasi ye-DC kunye nokuqinisekisa ukusebenza kwe-PCS okuqhubekayo.

2. Ukhuseleko oluphindwe kabini lwe-High Voltage Withstand kunye noZinzo lobushushu

Izitishi zamandla ze-PV zihlala zijongene neendawo ezinzima ezifana nobushushu obuphezulu kunye nokufuma okuphezulu. Ii-capacitor zefilimu ze-YMIN zihlangabezana nale mingeni ngoyilo olutsha:

• Ukusebenza Okuzinzileyo Kuluhlu Olubanzi Lobushushu: Ubushushu bokusebenza bugubungela -40°C ukuya kwi-105°C, kunye nesantya sokudilika kwamandla esingaphantsi kwe-5% kwiindawo ezinobushushu obuphezulu, okuthintela ukungasebenzi kwenkqubo ngenxa yokuguquguquka kobushushu.

• Umthamo wamandla ombane weRipple: Umthamo wokuphatha umbane weRipple ungaphezulu kwe-10 kunee-capacitors ze-electrolytic zemveli, ukucoca ngokufanelekileyo ingxolo ye-harmonic kwimveliso ye-PV kunye nokuqinisekisa ukuba umgangatho wamandla oqhagamshelwe kwigridi uyahlangabezana nemigangatho yesizwe.

• Ubomi obude kunye nokungabikho kokugcinwa: Ngobomi obude obufikelela kwiiyure ezili-100,000, obudlula kakhulu iiyure ezingama-30,000-50,000 zee-capacitors ze-aluminium electrolytic, oku kunciphisa iindleko zokusebenza kunye nokugcinwa kwezityalo zamandla ze-photovoltaic.

3. Ukusebenzisana nezixhobo zeSiC/IGBT

Njengoko iinkqubo ze-photovoltaic zitshintsha ziye kwii-voltage eziphezulu (uyilo lwe-1500V lusiba yinto eqhelekileyo), ii-capacitors ze-YMIN thin-film zihambelana kakhulu nee-power semiconductors zesizukulwana esilandelayo:

• Inkxaso yokuTshintsha ngokuGqibeleleyo: Uyilo oluphantsi lokungangenisi amandla luhambelana neempawu eziphantsi zeSiC MOSFETs (ukutshintsha ngokuGqibeleleyo > 20kHz), kunciphisa inani lezinto ezingasebenziyo kwaye kuncedisa ekuncitshisweni kweenkqubo zePCS (inkqubo ye-40kW ifuna ii-capacitors ezi-8 kuphela, xa kuthelekiswa ne-22 kwizisombululo ezisekelwe kwi-silicon).

• Ukuphucula i-dv/dt Ukumelana: Ukuphucula ukuzivumelanisa notshintsho lwe-voltage, okuthintela ukushukuma kwe-voltage okubangelwa zisantya sokutshintsha esigqithisileyo kwizixhobo ze-SiC.

4. Ixabiso leNqanaba leNkqubo: Ukuphuculwa kokuSebenza kakuhle kwamandla kunye nokuphuculwa kweendleko

• Ukusebenza kakuhle okuphuculweyo: Uyilo lwe-ESR ephantsi lunciphisa ukulahleka kobushushu, luphucula ukusebenza kakuhle kwe-PCS iyonke kwaye lunyusa kakhulu imveliso yamandla yonyaka.

• Ukonga Indawo: Uyilo oluphezulu lwamandla (oluncinci ngama-40% kunee-capacitor zemveli) luxhasa uyilo lwezixhobo ze-PCS ezincinci kwaye lunciphisa iindleko zokufakela.

Isiphelo

Ii-capacitor zefilimu ze-YMIN, ezineengenelo zazo eziphambili zokunyamezela i-voltage ephezulu, ukunyuka kobushushu obuphantsi, kunye nokugcinwa kwe-zero, zidityaniswe nzulu kwiinkalo ezibalulekileyo ze-inverters ze-PCS ze-photovoltaic, kubandakanya i-DC-Link buffering, ukhuseleko lwe-IGBT, kunye nokucoca i-grid harmonic. Zisebenza "njengomlindi ongabonakaliyo" wokusebenza okusebenzayo nokuzinzileyo kwizityalo zamandla ze-photovoltaic. Ubuchwepheshe bazo abuqhubeli nje kuphela iinkqubo zokugcina amandla e-photovoltaic "ezingagcinwanga kakuhle kulo lonke ixesha labo lobomi," kodwa zikwanceda ishishini elitsha lamandla ukukhawulezisa ukufezekisa ukulingana kwegridi kunye notshintsho lwe-zero-carbon.