Mobile QR Code QR CODE : The Korean Institute of Power Electronics
Title Sinusoidal Current Control of Single-Phase PWM Converters under Voltage Source Distortion Using Composite Observer
Authors ThanhHaiNguyenThanh Hai Nguyen ; 李Dong-Choon Lee ; 李Suk-Gyu Lee
DOI 10.6113/TKPE/2011.16.5.466
Page pp.466-476
ISSN 1229-2214
Keywords Composite observer; PLL; PR controller; single-phase PWM converters
Abstract In this paper, a high-performance current control for the single-phase PWM converter under distorted source voltages is proposed using a composite observer. By applying the composite observer, the fundamental and high-order harmonic components of the source voltage and current are extracted without a delay. The extracted fundamental component is used for a phase-lock loop (PLL) system to detect the phase angle of the source voltage. A multi-PR (proportional-resonant) controller is employed to regulate the single-phase line current. The high-order harmonic components of the line current are easily eliminated, resulting in the sinusoidal line current. The simulation and experimental results have verified the validity of the proposed method.