基于模糊控制的双闭环PWM整流器

Double Closed Loop PWM Rectifier Based on Fuzzy Control

传统的双闭环PWM整流器设计中常常采用常规PID调节方式进行控制,但是由于PWM整流器具有非线性等特性,在较大的扰动和控制对象变化时情况下,使用PID调节方式难以得到满意的调节效果。该文将传统PID控制与模糊控制相结合,并引入负载电流前馈补偿,提出了一种新颖的控制策略,优化了PWM整流系统。理论分析和仿真表明:这种控制策略能使系统获得优良的动态和静态性能,而且设计方法简单,控制器容易实现。

Double closed loop PWM rectifier is regulated by PID regulator in traditional design, because of the non-linear character of PWM rectifiers, especially with the bigger interference and change of controlled object the PID regulator couldn＇t achieve satisfactory, results. A novel control strategy combined PID with fuzzy control and led in feed forward compensation of load current is designed, which optimized PWM rectify control system. The theory analysis and simulation results demonstrate that this control strategy is convenient and efficient.