基于滑模控制的VIENNA型整流器研究

Research of VIENNA-Type Rectifier Based on Sliding-Mode Control

在分析VIENNA整流器数学模型的基础上,针对常规PI控制整流器对系统参数变化较为敏感的问题,提出了一种基于dq两相同步旋转坐标系的双闭环滑模变结构控制算法,并引入中点电位因子对中点电压进行平衡控制。仿真结果表明,应用滑模变结构控制的VIENNA整流器,不仅设计和实现简单,而且具有较好的鲁棒性和动态性能。

Based on analysis of the mathematics model of VIENNA rectifier,according to the defect of conventional PI control based rectifier that is too sensitive to the variation of system parameters ,a sliding-model-control strategy of the VIENNA rectifier was put forward,which used dual closed loop based on dq two-phase synchronous rotating coordinate system. And the midpoint potential factor f was introduced for controlling the midpoint voltage balance. Finally, a simulation model was established, which illustrated that the VIENNA rectifier controlled by sliding-mode variable structure was easy to design and implement,and it possessed good robustness and dynamic perfornmnce.