Direct torque control system of high-voltage high-power asynchronous machine based on active disturbance rejection control technique

作者：Liu Zi Jian; Wu Min; Wang Yi Jun^*; Chen Xin; Wang Chun Sheng; Lei Qi

来源：Journal of Central South University(Science and Technology), 2011, 42(11): 3392-3398.

• Active disturbance rejection controls
• Asynchronous machine
• Cascaded multilevel inverter
• Direct torque control
• Pulse width modulation (PWM)

Considering the nonlinear characteristic of asynchronous machine, a novel approach to direct torque control system of high-voltage high-power asynchronous machine fed was presented using cascaded multilevel inverter. The stator flux increment vector including range increment and phase increment was obtained when the stator flux and machine torque were controlled in a closed way in the stator coordinate. The required stator voltage vector was calculated according to the stator flux increment vector. The stator flux and machine torque were estimated by an adaptive observer. The speed, torque and stator flux controllers were designed by using active disturbance rejection control technique, and these controllers have high robustness. The load disturbance was estimated and compensated by the speed controller, which effectively removed the static tracking error that would be caused by the disturbance without compensation. The results show that inverter switching signals are generated by carrier phase-shifted pulse width modulation method, and thus the torque and stator flux amplitude ripples are reduced. The closed-loop control system has excellent dynamic and static performance.

• 出版日期2011
• 单位中南大学