CIGRE 35 (2021) (стр. 473-482)
АУТОР(И) / AUTHOR(S): Jelena Čakarević, Katarina Obradović, Aleksandar Milić
Е-АДРЕСА / E-MAIL: cakarevicjelena1@gmail.com
DOI: 10.46793/CIGRE35.0473C
САЖЕТАК / ABSTRACT:
Rastući trend distribuirane proizvodnje električne energije iz solarnih izvora diktira razvoj kompaktnih, efikasnih i jeftinih rešenja energetskih pretvarača. Tradicionalni pristup postizanja galvanske izolacije u solarnim elektranama podrazumeva rad mrežnih pretvarača uz niskofrekventne energetske transformatore, koji su često predimenzionisani. Korišćenjem topologija koje u sebi integrišu transformator za visoke radne učestanosti ostvaruju se niža cena i manji gabarit celog sistema. Ipak, da bi se postigla prihvatljiva efikasnost za namotaje visokofrekventnog transformatora potrebno je koristiti skupe licnaste provodnike. U radu je data uporedna analiza dva pristupa za postizanje galvanske izolacije u solarnim pretvaračima – sa transformatorom za 50Hz naspram primene transformatora za 200kHz i to prema efikasnosti sistema, zapremini i ceni. Mrežni pretvarač je u obe realizacije monofazni invertor snage 1000 W sa izlaznim LCL filtrom. Na bazi dobijenih rezultata formulisane su smernice za dizajn visokofrekventnog transformatora u cilju postizanja efikasnog, jeftinog i kompaktnog galvanskog odvajanja.
КЉУЧНЕ РЕЧИ / KEYWORDS:
galvanska izolacija, solarni invertor, visokofrekventni transformator, mrežni transformator
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