Title :
Robust current control method with disturbance voltage observer for voltage source PWM inverter
Author :
Senjyu, Tomonobu ; Kamifurutono, Hisashi ; Uezato, Katsumi
Author_Institution :
Fac. of Eng., Ryukyus Univ., Okinawa, Japan
Abstract :
The voltage source PWM (pulse width modulated) inverter is used for power supply in the field of motor control, UPS (uninterruptible power supply), power conditioner, and so on. Current tracking control for the PWM inverter is very important, since current control ability affects control performance of plant. In this paper, the robust current control method with a disturbance voltage observer for a voltage source PWM inverter is presented; current is controlled to be exactly equal to the reference current under variations of load parameters and operating conditions. Also, the influence of estimation error is restrained by time-varying feedback gain based on Lyapunov´s direct method. The feedback gain is calculated on-line to ensure the system´s stability with various disturbances
Keywords :
Lyapunov methods; PWM invertors; electric current control; feedback; observers; robust control; simulation; Lyapunov´s direct method; UPS; control performance; current tracking control; disturbance voltage observer; estimation error; feedback gain; load parameter variations; motor control; power conditioner; power supply; pulse width modulated inverter; robust current control; three phase; time-varying feedback gain; uninterruptible power supply; voltage source PWM inverter; Current control; Estimation error; Feedback; Motor drives; Pulse inverters; Pulse width modulation inverters; Pulsed power supplies; Robust control; Uninterruptible power systems; Voltage control;
Conference_Titel :
Power Electronics and Drive Systems, 1995., Proceedings of 1995 International Conference on
Print_ISBN :
0-7803-2423-4
DOI :
10.1109/PEDS.1995.404891
