关键词: 双馈感应电机, PI调节, 直接转矩控制, 遗传算法

Abstract:

In the direct torque control system of traditional doubly fed induction machines, there exists the problem of large torque ripple at low speed, which affects the control performance of the system. Aiming at the problem of the traditional control system is improved, the genetic algorithm is applied to the direct torque control system of doubly fed motor, parameter optimization of PI controller online, matching control system in different working conditions demand. Simulation results show that the proposed method can effectively reduce the torque ripple and flux ripple, improve the dynamic performance during speed regulation, and enlarge the speed range.

Key words: doubly-fed induction motor (DFIM), PI adaptive, direct torque control (DTC), genetic algorithm (GA)