【摘要】 由于PI调节的滞后性及三相电压型PWM整流器的非线性特征,双闭环PI控制算法难以使PWM整流器在扰动下获得良好的动态性能。考虑到滑模变结构控制对干扰及参数变化具有很强的鲁棒性,结合PWM整流器在两相同步旋转坐标系下的数学模型,设计了一种滑模变结构控制算法。在Matlab/Simulink环境下搭建了PWM整流器控制系统仿真模型。滑模变结构控制算法与双闭环PI控制算法调节性能的对比表明,滑模变结构控制算法具有更好的动态性能。更多还原

【Abstract】 Due to the lag of PI regulation and the nonlinear characteristic of three-phase voltage source PWM rectifier,the dual-closed loop PI control algorithm can hardly let PWM rectifier obtain good dynamic performance under disturbance.Considering the robustness of sliding-mode variable structure control in case of disturbance and parameter variation,a sliding-mode variable structure control algorithm was designed according to the mathematical model of PWM rectifier on two-phase synchronous rotating reference frame.The PWM rectifier control system was modeled and simulated in Matlab/Simulink.Comparison of regulation performance between the sliding-mode variable structure control algorithm and the dual-closed loop PI control algorithm shows that the sliding-mode variable structure control algorithm possesses better dynamic performance.更多还原