ELEKTR TRANSPORT VOSITALARINI ZARYADLASH QURILMALARI ULANGAN PAST KUCHLANISHLI ELEKTR TARMOQLARIDA KUCHLANISH SIFATI VA GARMONIK BUZILISHLARNI KAMAYTIRISH USULLARI
Keywords:
elektromobil, past kuchlanishli tarmoq, kuchlanish sifati, garmonik buzilish, THD, Shunt APF, MATLAB/Simulink, 6-pulsli to‘g‘rilagich.Abstract
Ushbu ishda elektromobillarni zaryadlash qurilmalarining 0,4 kV past kuchlanishli elektr tarmoqlariga ta’siri va ular natijasida yuzaga keladigan kuchlanish sifati hamda garmonik buzilishlarni kamaytirish masalasi tadqiq etilgan. Elektromobil zaryadlash qurilmasining nochiziqli yuklama sifatidagi modeli 6-pulsli uch fazali to‘g‘rilagich, doimiy tok zanjiri va DC/DC o‘zgartirgich asosida shakllantirilgan. Garmonik buzilishlarni kamaytirish uchun Shunt Active Power Filter (Shunt APF) qo‘llanilib, uning boshqaruvi oniy aktiv va reaktiv quvvatlarga asoslangan P–Q nazariyasi yordamida tashkil etilgan. Kompensatsiya toklarini aniqlashda Clarke transformatsiyasi, past chastotali filtr, PI-regulyator, teskari Clarke transformatsiyasi va histerezisli tok boshqaruvi qo‘llanilgan. MATLAB/Simulink muhitida 400 V, 50 Hz kuchlanishli va 50 kW quvvatli EV zaryadlash stansiyasi modeli tadqiq qilingan. Keltirilgan natijalarga ko‘ra, Shunt APF qo‘llanganda tokning umumiy garmonik buzilishi 31,8 % dan 3,6 % gacha kamaygan, PCC kuchlanishi esa 371 V dan 395 V gacha yaxshilangan.
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