Title :
Study on Mathematical Model and Lyapunov-Based Control for Three-Level NPC Voltage-Source Rectifier
Author :
Yongqing, Meng ; Zheng, Liu ; Shen ChuanWen ; Yi, Liang ; Yanmin, Su ; Ting, Yu
Author_Institution :
Dept. of Electr. Eng., Xi´´an Jiaotong Univ.
Abstract :
In this paper, the mathematical model of three-level neutral-point-clamped (NPC) voltage source rectifier (VSR) using switching functions is founded firstly, and its operating principle is analyzed. Then a new nonlinear control law based on Lyapunov´s 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 PI controller of DC-link voltage and adding feedforward control of load current, the steady state error of the converter resulting from parameter uncertain can be eliminated effectively. Computer simulations of the system confirm the validity of the mathematical model and the effectiveness of the proposed control strategy
Keywords :
Lyapunov methods; PI control; PWM rectifiers; control system synthesis; feedforward; mathematical analysis; nonlinear control systems; power convertors; stability; voltage control; DC-link voltage; Lyapunov-based control; PI controller; PWM rectifier; feedforward control; functions; large-signal disturbances; load current; mathematical model; nonlinear control law; stability theory; three-level NPC voltage-source rectifier; three-level neutral-point-clamped voltage source rectifier; transient response; Computer errors; Computer simulation; Error correction; Lyapunov method; Mathematical model; Pulse width modulation; Rectifiers; Steady-state; Transient response; Voltage control;
Conference_Titel :
Industrial Electronics, 2006 IEEE International Symposium on
Conference_Location :
Montreal, Que.
Print_ISBN :
1-4244-0496-7
Electronic_ISBN :
1-4244-0497-5
DOI :
10.1109/ISIE.2006.295763
