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笔者针对谐波抑制的同时需要补偿大容量的无功功率的要求,分析和比较了目前常用的混合型有源电力滤波器的拓扑结构,采用了一种新颖的结构即新型串联谐振注入式混合有源滤波器,分析了其工作原理和传递函数。针对有源电力滤波器系统参考信号是以20ms为公倍周期的各次谐波的合成量这一特点,在传统PI算法的基础上根据参考电流是周期量这一特点提出了递推积分PI算法。利用PSIM仿真软件建立了仿真模型,理论和仿真实验都证明采用该控制算法可使注入型有源电力滤波器实现更精确的控制、更快的响应速度和更理想的补偿效果。
In order to compensate the large reactive power, aiming at the harmonic suppression, the author analyzes and compares the topologies of hybrid active power filters which are commonly used at present, and adopts a novel structure of novel series resonant injection hybrid Active filter, analyzed its working principle and transfer function. Aiming at the characteristic that the reference signal of active power filter system is composed of harmonics of common double period of 20ms, based on the traditional PI algorithm, the recursive integral PI algorithm. The simulation model is established by PSIM simulation software. Both theoretical and simulation experiments prove that the control algorithm can achieve more precise control, faster response and better compensation.