Repetitive Controller Design to Reduce THD of an AC Power Supply

AC 전원장치의 출력 THD저감을 위한 반복제어기 설계

This paper presents the design method of a repetitive controller to educe the harmonics in the output voltage waveform of the AC power supply systems. Output voltage error under the nonlinear load like a rectifier is cyclic with the same period to fundamental wave, therefore one can design the repetitive controller calculating cycle by cycle. The controller is verified mathematically and by simulations.