Uphononongo malunga neTopology kunye nezicelo zoLawulo lweeTransformers ze-Electronic Power ze-Medium-High Voltage III

3.3 I-Clemeded Multilevel Topology

I-topology ye-Neutral Point Clamped (NPC) multilevel ibonisiwe. Ngaphandle kwe-topology ye-NPC ene-diode-clamped, ii-topology ze-NPC ziquka uhlobo lwe-flying capacitor kunye nohlobo lwe-hybrid clamped, phakathi kwezinye. Nangona kunjalo, ngenxa yomthamo omkhulu we-capacitor, ii-topology ze-NPC zisasebenzisa kakhulu izixhobo zokutshintsha ezingasebenziyo okanye ezisebenzayo zokucinezela. Ukuthatha i-topology ye-diode-clamped multilevel njengomzekelo, kwi-topology yesigaba se-rectifier esinezigaba ezintathu, umlenze ngamnye wesigaba uqulathe ii-transistors zokutshintsha ezicascaded kunye nee-diode zokubopha, eziqhagamshelwe ngokuhambelana nebhasi enye ye-DC ene-voltage ephezulu. Uncwadi lucebise i-topology ye-PET yesigaba esinye enesigaba sokulungisa kusetyenziswa isekethe ene-diode-clamped enezigaba ezine. Ibhasi enye ye-DC ene-voltage ephezulu ilandelwa yi-input-series-output-parallel DABs, njengoko kubonisiwe. Le topology inokwandiswa ibe yisakhiwo sesigaba sesithathu, kwaye inani lamanqanaba e-voltage linokutshintshwa ngokusekelwe kumanqanaba e-voltage amelana nesixhobo kunye nenqanaba le-voltage esecaleni ye-voltage ephezulu. Njenge-topology ye-MMC, i-topology ye-NPC ingasetyenziswa nakwisigaba sokuzahlula, idibanisa ibhasi ye-DC ene-voltage ephezulu kunye ne- Isiguquli sokuZihlukanisa, njengoko kubonisiwe. Uncwadi lusebenzise i-NPC converter ene-diode-clamped yamanqanaba amathathu kwicala le-high-voltage ye-LLC resonant converter, luyiqinisekisa kwi-prototype ye-166kW/2kV ~ 400V. Uncwadi lusebenzise isekethe ye-NPC ene-diode-clamped yamanqanaba amathathu kwi-DAB yezigaba ezintathu, nto leyo efezekisa iimpawu ze-DAB ezifanelekileyo kunye neempawu zangoku.

Xa i-NPC topology isetyenziswa njengesigaba sokulungisa, ayifuni iibhasi ze-DC ezizimeleyo, nto leyo enciphisa inani lee-transformers zesigaba sokwahlula. Ngaphezu koko, kwizakhiwo zezigaba ezintathu, akukho mbane uphindaphindayo ophindwe kabini kwibhasi. Nangona kunjalo, ngenxa yokuba i-clamped topology ifuna inani elikhulu lezixhobo zokubopha, inani lezixhobo zokubopha liyanda njengoko inani lamanqanaba lisanda, okwenza ukwanda kwamanqanaba kube nzima kwaye kube nzima ukufezekisa ukuphindaphinda. Ngokuphathelele ulawulo, imisinga egeleza kwi-capacitor nganye yebhasi ye-NPC converter yahlukile, nto leyo ekhokelela ekungalinganini kwe-capacitor voltage. Kwi-NPC topology engaphezulu kwamanqanaba amathathu, akukho algorithm esebenzayo yokulinganisela i-voltage. Ukongeza, amaxesha okusebenza angahambelaniyo okutshintsha ngaphakathi nangaphandle kweengalo kukhokelela ekufudumaleni okungalinganiyo, okunokusonjululwa kuphela ngokutshintsha i-topology yesekethe iyonke.

Ubunzima obuninzi obubangelwa kukwandiswa kwamanqanaba buthetha ukuba ii-topologies ze-NPC zingasetyenziswa kuphela kumanqanaba ombane aphakathi/aphezulu ngoqhagamshelo lwezixhobo okanye ukusetyenziswa kwezixhobo ze-SiC ezine-voltage ephezulu. Nangona kunjalo, kumanqanaba ombane aphantsi, xa kuthelekiswa ne-topology enye ye-H-bridge, i-NPC enamanqanaba amathathu inesiqingatha kuphela sokumelana nombane kunye noxinzelelo lwe-voltage kwi-transistor nganye etshintshayo, ngelixa ikhupha amanqanaba ombane amaninzi, okubangela iimfuno zokucoca iziphumo eziphantsi. Inezibonelelo ezininzi zokusetyenziswa njengesigaba se-inverter kwicala le-voltage ephantsi ye-PET. Umzekelo, uncwadi lusebenzise i-NPC ene-diode enamanqanaba amathathu njengesigaba se-inverter se-PET ukuqhuba i-motor enamanqanaba amathathu, ukwenza uvavanyo lokuvavanya kunye nokufezekisa ukusebenza kakuhle kwe-motor drive kunye nokusebenza kwengxolo.