三相电压型PWM整流器的模糊PI控制策略研究

Three-phase PWM Voltage Rectifier Fuzzy PI Control Strategy

三相电压型PWM整流器由于开关器件的非线性和对电路参数的依赖性,使得传统的PI双闭环控制无法更好的提高其动态性能,因此限制了其在更宽负载范围内的运用。本文在建立三相PWM整流器数学模型的基础上,针对目前三相PWM整流器动态性能较差的特点,设计了一种模糊PI控制器。仿真实验表明:该控制方法设计简单,提高了PWM整流器的动态性能,而且较好地实现了电流的解耦控制,且使系统鲁棒性增强。

Three-phase PWM rectifier voltage switching devices because of nonlinearity and the dependence on circuit parameters,the traditional double loop PI control can not be better to improve their dynamic performance,thus limiting their use of a wider load range.Three-Phase PWM Rectifier in the establishment of this mathematical model based on the three-phase PWM rectifier for the current poor dynamic performance characteristics.Point,a fuzzy PI controller.Simulation results show that：the control method is simple,improve the dynamic performance of PWM rectifier,and better achieved the current decoupling control,and enhance the system robustness.