Title :
Research on control method of three-level NPC voltage source rectifier
Author :
Jinghua, Zhou ; Yongqing, Meng ; Zhengxi, Li ; Kun, Liu
Author_Institution :
Coll. of Mech. & Electr. Eng., North China Univ. of Technol., Beijing
Abstract :
In this paper, the mathematical model of three-phase four-wire three-level neutral-point-clamped (NPC) voltage source rectifier (VSR) using switching functions is founded and its operating principle analyzed. Then a new nonlinear control law based on Lyapunovpsilas stability theory for the PWM rectifier is presented. With this control law, the converter can be stabilized globally for handling large-signal disturbances, and exhibit good transient response. Also, by designing new three-level sinusoidal PWM method, this paper solves effectively the problem that the neutral point potential of DC-link has triple-harmonic fluctuation resulting from existing three-level SPWM method. Computer simulations of the system confirm the validity of the mathematical model and the effectiveness of the proposed control strategy.
Keywords :
PWM rectifiers; mathematical analysis; nonlinear control systems; stability; switching convertors; Lyapunov´s stability theory; PWM rectifier; large- signal disturbances; neutral-point-clamped; nonlinear control law; switching functions; three-level NPC voltage source rectifier; three-level sinusoidal PWM method; triple-harmonic fluctuation; Fluctuations; Mathematical model; Propulsion; Rectifiers; Space vector pulse width modulation; Switches; Topology; Variable speed drives; Vehicles; Voltage control; Lyapunov; NPC; SPWM; VSR;
Conference_Titel :
Vehicle Power and Propulsion Conference, 2008. VPPC '08. IEEE
Conference_Location :
Harbin
Print_ISBN :
978-1-4244-1848-0
Electronic_ISBN :
978-1-4244-1849-7
DOI :
10.1109/VPPC.2008.4677718
