Isuzuma ku mikoreshereze ya Topology na Control ya Transformers z'amashanyarazi zikoresha Voltage yo Hagati na Hejuru III

3.3 Topiology y'urwego rwinshi ihambiriye

Hagaragajwe topolojia ya Neutral Point Clamped (NPC). Uretse topolojia ya NPC ifite diode-clamped, topolojia ya NPC irimo kandi ubwoko bwa capacitor iguruka n'ubwoko bwa hybrid clamped, n'ibindi. Ariko, kubera ingano nini ya capacitor, topolojia ya NPC iracyakoresha ibikoresho byo guhindura ibintu bidakora cyangwa bikora mu gufunga. Dufashe urugero rwa topolojia ya diode-clamped multilevel, muri topolojia y'icyiciro cya gatatu cyo gukosora, buri gice cy'icyiciro kigizwe na transistors zihinduranya zicassed na diodes zifatana, zihujwe hamwe na bisi imwe ya DC ifite voltage nyinshi. Inyandiko zatanze topolojia ya PET y'icyiciro kimwe ifite urwego rwo gukosora hakoreshejwe circuit ifite diode y'icyiciro cya kane. Bus imwe ya DC ifite voltage nyinshi ikurikirwa na DABs zinjira-uruhererekane-zisohoka-zikwirakwira, nk'uko bigaragazwa. Iyi topolojia ishobora kwaguka mu buryo bw'icyiciro cya gatatu, kandi umubare w'urwego rwa voltage ushobora guhinduka hashingiwe ku rugero rwa voltage yihanganira igikoresho n'urwego rwa voltage nyinshi ku ruhande rwa voltage nyinshi. Kimwe na topolojia ya MMC, topolojia ya NPC ishobora no gukoreshwa mu cyiciro cyo kwitandukanya, ihuza bisi ya DC ifite voltage nyinshi na Transformer yo kwitandukanya, nk'uko bigaragazwa. Ubuvanganzo bwakoresheje converter ya NPC ifite diode-clamped yo mu rwego rwa gatatu ku ruhande rufite voltage nyinshi rwa converter ya LLC resonant, buyigenzura kuri prototype ya 166kW/2kV ~ 400V. Ubuvanganzo bwakoresheje circuit ya NPC ifite diode-clamped yo mu rwego rwa gatatu kuri DAB ifite phase eshatu, bugera ku miterere myiza ya DAB n'umuvuduko w'amashanyarazi.

Iyo topolojia ya NPC ikoreshejwe nk'icyiciro cyo gukosora, ntabwo isaba bisi za DC zatandukanye, bigabanya umubare wa transformers zo mu cyiciro cyo gutandukanya. Byongeye kandi, mu miterere y'ibice bitatu, nta mvubura y'amashanyarazi ihinduka inshuro ebyiri kuri bisi. Ariko, kubera ko topolojia ihambiriye isaba umubare munini w'ibikoresho byo gufunga, umubare w'ibikoresho byo gufunga uriyongera uko umubare w'urwego wiyongera, bigatuma kwaguka kw'urwego bigorana kandi kugabanuka kugakomera. Mu bijyanye no kugenzura, imigezi inyura muri buri capacitor ya bisi ya NPC converter iratandukanye, bigatuma habaho ihindagurika ry'amashanyarazi ya capacitor. Kuri topolojia ya NPC iri hejuru y'ibice bitatu, nta buryo bwo guhuza ingufu bukora neza. Byongeye kandi, ibihe bidahuye by'imikorere y'amahindura imbere no hanze y'amaboko bituma habaho ubushyuhe budahuje, ibyo bikaba byakemurwa gusa no guhindura topolojia rusange y'uruhererekane.

Ingorane nyinshi ziterwa no kwaguka k'urwego bivuze ko imiterere ya NPC ishobora gukoreshwa gusa mu rugero rw'amashanyarazi ari hagati/ari hejuru binyuze mu guhuza ibikoresho cyangwa gukoresha ibikoresho bya SiC bifite voltage nyinshi. Ariko, ku rugero rw'amashanyarazi ari hasi, ugereranije na topology imwe ya H-bridge, NPC ifite level eshatu ifite 1/2 gusa imbaraga zo kwihanganira voltage n'imbaraga za voltage kuri buri transistor ihinduranya, mu gihe isohora voltage nyinshi, bigatuma ibisabwa mu kuyungurura bigabanuka. Ifite inyungu nyinshi zo kuyikoresha nk'urwego rwa inverter ku ruhande rwa PET rufite voltage nke. Urugero, inyandiko zakoresheje NPC ifite diode eshatu nk'urwego rwa inverter rwa PET kugira ngo itware moteri y'ibice bitatu, ikora igenzura ry'igerageza kandi igera ku musaruro mwiza wa moteri n'urusaku.