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针对三相四开关有源电力滤波器(Three-phase Four-switch Active Power Filter,TFAPF)非线性强耦合的特点,设计了一种新型的基于多输入-多输出反馈线性化和空间矢量脉宽调制的控制器。首先推导出了三相四开关有源电力滤波器在d-q同步旋转坐标系下的数学模型。在此基础上,应用多输入-多输出反馈线性化的控制方法,实现了d-q坐标系下的有功电流和无功电流解耦控制。通过选取适当的反馈系数,得到有源电力滤波器交流侧的指令电压,采用三相四开关的空间电压矢量脉宽调制技术对指令电压进行逼近。通过MATLAB仿真分析,验证了所提方案的正确性和可行性。
Aiming at the nonlinear strong coupling of three-phase four-switch active power filter (TFAPF), a novel multi-input multi-output feedback linearization and space vector pulse width Modulation controller. First, the mathematical model of three-phase four-switch active power filter in d-q synchronous rotating coordinate system is deduced. On this basis, the control method of multi-input-multi-output feedback linearization is used to realize the active current and reactive current decoupling control in d-q coordinate system. By choosing the appropriate feedback coefficient, the command voltage of the AC side of the active power filter is obtained, and the command voltage is approximated by the space voltage vector pulse width modulation technique of three-phase four-switch. Through the MATLAB simulation analysis, the correctness and feasibility of the proposed scheme are verified.