Title :
Discrete feedforward sliding mode control of a PWM inverter for sinusoidal output waveform synthesis
Author :
Jung, Shih-Liang ; Tzou, Ying-Yu
Author_Institution :
Power Electron. & Motion Control Group, Nat. Chiao Tung Univ., Hsinchu, Taiwan
Abstract :
This paper presents a new discrete feedforward sliding mode control scheme for closed-loop regulation of PWM inverters in applications of high-performance uninterruptible power supply (UPS) systems. Owing to the existence of the feedforward path, discretization of the reference signal with large step size is not required. Moreover, only the output voltage needs to be measured as feedback in the proposed control scheme. A DSP-based digital-controlled PWM inverter has been implemented to examine the actual response of the designed controller. Simulation and experimental results show that the constructed digital PWM inverter control system has fast dynamic response and low total harmonic distortion (THD) under the proposed discrete feedforward sliding mode control scheme
Keywords :
closed loop systems; control system synthesis; digital control; discrete systems; dynamic response; feedback; invertors; power engineering computing; power system harmonics; pulse width modulation; uninterruptible power supplies; variable structure systems; voltage control; DSP; PWM inverter; UPS; closed-loop regulation; digital control; discrete feedforward sliding mode control; dynamic response; feedback; output voltage control; sinusoidal output waveform synthesis; total harmonic distortion; uninterruptible power supply; Active filters; Control system synthesis; Digital control; Distortion measurement; Output feedback; Power harmonic filters; Pulse width modulation inverters; Reactive power; Sliding mode control; Switching frequency; Total harmonic distortion; Transient response; Uninterruptible power systems; Voltage control;
Conference_Titel :
Power Electronics Specialists Conference, PESC '94 Record., 25th Annual IEEE
Conference_Location :
Taipei
Print_ISBN :
0-7803-1859-5
DOI :
10.1109/PESC.1994.349682