非正交坐标系下模糊PI三相VSR控制系统研究*

为了提高三相PWM电压型整流器(VSR)的动静态性能,针对三相VSR传统PI控制器参数固定的缺陷,在传统双闭环控制策略的基础上将电压外环采用模糊PI控制器,在线调整PI控制器的两个参数,增强系统的鲁棒性。采用非正交坐标系下的SVPWM算法,与传统SVPWM相比简化了矢量算法步骤,更有利于数字化实现。最后利用MATLAB仿真分析了三相VSR的运行数据,通过比较可知,模糊PI非正交矢量控制系统与传统PI矢量控制系统相比具有更好的动态稳定性、跟踪性和抗干扰能力,仿真结果为此类硬件装置提供了改进设计的依据。

Study of Fuzzy PI Three-phase Voltage-Source PWM Rectifier Control System Based on Non-orthogonal Coordinates

Focusing on the defects of traditional PI controller of three-phase VSR-fixed parameter , this paper , based on the traditional double-closed loop control strategy , proposes to employ fuzzy PI controller for outer voltage loop in order to improve dynamic and static performance , which can improve the robustness and optimize the performance of the system.A SVPWM algorithm based on non-orthogonal coordinates is applied to inverter , and the algorithm steps are more simplified compared with the conventional SVPWM .The fuzzy PI based on non-orthogonal coordinates vector system is superior the conventional PI vector control system in dynamic stability , speed tracking and anti-interference by and MATLAB simulation analyzing the running data of three phase VSR , which provides the basis for improving the design of this kind of hardware device .