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Digital Control of Three-Phase UPS Inverter using Internal Model
Woo, J.I.,Cho, Y.G.,Jung, Y.I.,Park J.H.,Seo, J.K. 동아대학교 생산기술연구소 1999 生産技術硏究所硏究論文集 Vol.4 No.1
This paper deals with the novel digital control of the three phase PWM(Pulse Width Modulation) inverter for UPS(Uninterruptible Power Supply). In this paper, the voltage and current of output filter capacitor as a state variable are the feedback control input, and the switching pulse width is adopted by deadbeat control so that the output voltage is been exactly equal to the reference voltage. Especially, this paper proposes internal model in order to improve the performance deterioration of deadbeat control caused by the parameter variation.