Title :
Adaptive repetitive control of PWM inverters for very low THD AC-voltage regulation with unknown loads
Author :
Tzou, Ying-Yu ; Jung, Shih-Liang ; Yeh, Hsin-Chung
Author_Institution :
Dept. of Electr. & Control Eng., Nat. Chiao Tung Univ., Hsinchu, Taiwan
fDate :
9/1/1999 12:00:00 AM
Abstract :
An adaptive repetitive control scheme is proposed and applied to the control of a pulsewidth-modulated (PWM) inverter used in a high-performance AC power supply. The proposed control scheme can adaptively eliminate periodic distortions caused by unknown periodic load disturbances in an AC power supply. The proposed adaptive repetitive controller consists of a voltage regulator using state feedback control, a repetitive controller with tuning parameters and an adaptive controller with a recursive least-squares estimator (LSE). This adaptive repetitive controller designed for AC voltage regulation has been realized using a single-chip digital signal processor (DSP) TMS320C14 from Texas Instruments. Experimental verification has been carried out on a 2 kVA PWM inverter. Simulation and experimental results show that the DSP-based adaptive repetitive controller can achieve both good dynamic response and low total harmonic distortion (THD) under large-load disturbances and uncertainties
Keywords :
DC-AC power convertors; PWM invertors; adaptive control; control system analysis; control system synthesis; dynamic response; harmonic distortion; power conversion harmonics; state feedback; voltage control; 2 kVA; AC voltage regulation; PWM inverters; TMS320C14 DSP; adaptive controller; adaptive repetitive control scheme; control design; control performance; control simulation; dynamic response; low THD AC-voltage regulation; periodic distortions elimination; recursive least-squares estimator; state feedback control; total harmonic distortion; tuning parameters; voltage regulator; Adaptive control; Power supplies; Programmable control; Pulse inverters; Pulse width modulation inverters; Pulsed power supplies; Recursive estimation; Regulators; State feedback; Voltage control;
Journal_Title :
Power Electronics, IEEE Transactions on
