Title :
Design of current controller for 3-phase PWM converter with unbalanced input voltage
Author :
Kim, H.S. ; Mok, H.S. ; Choe, G.H. ; Hyun, D.S. ; Choe, S.Y.
Author_Institution :
Dept. of Electr. Eng., Kon-Kuk Univ., Seoul, South Korea
Abstract :
Generally current controllers of three-phase PWM power converters have been implemented in the synchronous frame because the synchronous frame controller can eliminate steady state error and has fast transient response by decoupling control. However most of such controllers have been designed under balanced input voltage. Therefore such designed current controllers showed undesirable current control characteristics under unbalanced conditions because the current reference is distorted by the second order harmonic voltage due to negative sequence. In this paper, a current controller for a PWM power converter, considering unbalanced input voltage, is designed and verified by both simulation and experiment
Keywords :
PWM power convertors; control system analysis; control system synthesis; electric current control; harmonic distortion; power system harmonics; transient response; control design; control performance; control simulation; current control characteristics; current controller; current reference; decoupling control; negative sequence; second order harmonic voltage distortion; steady state error; three-phase PWM power converter; transient response; unbalanced conditions; unbalanced input voltage; Analog-digital conversion; Control systems; Electric current control; Equations; Kirchhoff´s Law; Motor drives; Pulse width modulation; Pulse width modulation converters; Rectifiers; Voltage control;
Conference_Titel :
Power Electronics Specialists Conference, 1998. PESC 98 Record. 29th Annual IEEE
Conference_Location :
Fukuoka
Print_ISBN :
0-7803-4489-8
DOI :
10.1109/PESC.1998.701945
