Isibuyekezo mayelana ne-Topology kanye ne-Control Applications ze-Medium-High Voltage Power Electronic Transformers III

3.3 I-Topology Ehlanganisiwe Yezinga Eliningi

I-topology ye-Neutral Point Clamped (NPC) multilevel iboniswa. Ngaphandle kwe-topology ye-NPC ene-diode-clamped, i-topology ye-NPC ifaka phakathi uhlobo lwe-flying capacitor kanye nohlobo lwe-hybrid clamped, phakathi kokunye. Kodwa-ke, ngenxa yobuningi be-capacitor obukhulu, i-topology ye-NPC isasebenzisa kakhulu amadivayisi okushintsha angasebenzi noma asebenzayo ukuze ibambe. Uma sibheka i-topology ye-diode-clamped multilevel njengesibonelo, ku-topology yesigaba sokulungisa izigaba ezintathu, umlenze ngamunye wesigaba uqukethe ama-transistors okushintsha ahlanganisiwe kanye nama-diode okubopha, axhunywe ngokuhambisana nebhasi elilodwa le-DC elinomthamo ophezulu. Izincwadi ziphakamise i-topology ye-PET yesigaba esisodwa enesigaba sokulungisa kusetshenziswa isekethe ene-diode-clamped enezigaba ezine. Ibhasi elilodwa le-DC elinomthamo ophezulu lilandelwa ama-DAB okufaka uchungechunge-lokukhipha-okuhambisanayo, njengoba kuboniswe. Le topology ingandiswa ibe yisakhiwo sezigaba ezintathu, futhi inani lamazinga e-voltage lingashintshwa ngokusekelwe emazingeni e-voltage amelana nedivayisi kanye nezinga le-voltage eseceleni le-voltage ephezulu. Njenge-topology ye-MMC, i-topology ye-NPC ingasetshenziswa futhi esigabeni sokuhlukaniswa, ixhumanisa ibhasi le-DC elinamandla aphezulu ne- Isiguquli Sokuzihlukanisa, njengoba kuboniswe. Izincwadi zisebenzise i-converter ye-NPC ene-diode-clamped enamazinga amathathu ohlangothini oluphezulu lwe-converter ye-LLC resonant, ziyiqinisekisa ku-prototype engu-166kW/2kV ~ 400V. Izincwadi zisebenzise isekethe ye-NPC ene-diode-clamped enamazinga amathathu ku-DAB enezigaba ezintathu, zafinyelela i-voltage ye-DAB efanele kanye nezici zamanje.

Uma i-topology ye-NPC isetshenziswa njengesigaba sokulungisa, ayidingi amabhasi e-DC ahlukanisiwe, okunciphisa inani lama-transformer esigaba sokuhlukanisa. Ngaphezu kwalokho, ezakhiweni zezigaba ezintathu, akukho ukugeleza kwe-voltage yemigqa emibili ebhasini. Kodwa-ke, ngenxa yokuthi i-topology ehlanganisiwe idinga inani elikhulu lamadivayisi okubopha, inani lamadivayisi okubopha liyanda njengoba inani lamazinga likhuphuka, okwenza ukwanda kwezinga kube nzima futhi kube nzima ukukufeza ukuphindaphinda. Ngokuphathelene nokulawula, imisinga egeleza ku-capacitor ngayinye yebhasi yesiguquli se-NPC ihlukile, okuholela ekungalinganini kwe-voltage ye-capacitor. Kuma-topology e-NPC angaphezu kwamazinga amathathu, ayikho i-algorithm esebenzayo yokulinganisa i-voltage. Ngaphezu kwalokho, izikhathi zokusebenza ezingaguquki zokushintsha ngaphakathi nangaphandle kwezingalo ziholela ekushiseni okungalingani, okungaxazululwa kuphela ngokushintsha i-topology yesekethe iyonke.

Ubunzima obuningi obubangelwa ukwanda kwezinga busho ukuthi ama-topology e-NPC angasetshenziswa kuphela emazingeni e-voltage aphakathi nendawo/aphezulu ngokuxhumeka kochungechunge lwedivayisi noma ukusetshenziswa kwamadivayisi e-SiC ane-voltage ephezulu. Kodwa-ke, emazingeni e-voltage aphansi, uma kuqhathaniswa ne-topology eyodwa ye-H-bridge, i-NPC enamazinga amathathu inengxenye kuphela yokumelana ne-voltage kanye nokucindezeleka kwe-voltage ku-transistor ngayinye eshintshayo, ngenkathi ikhipha amazinga e-voltage amaningi, okuholela ezidingweni zokuhlunga okuphumayo okuphansi. Inezinzuzo ezinkulu zokusetshenziswa njengesigaba se-inverter ohlangothini lwe-voltage ephansi ye-PET. Isibonelo, izincwadi zisebenzise i-NPC enamazinga amathathu ene-diode-clamped njengesigaba se-inverter se-PET ukushayela imoto enezigaba ezintathu, zenza ukuqinisekiswa kokuhlola futhi zifinyelela ukusebenza okuhle kwe-motor drive kanye nokusebenza komsindo.