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由于有源滤波器中所需产生的补偿电流主要是各高次谐波组成的畸变电流,有源滤波器及其电流控制器必须要有能力跟踪变化很陡的畸变电流信号,所以有源滤波器的滤波效果很大程度上取决于其控制性能。为此,以大功率单独注入式有源电力滤波器为例,通过建立其数学模型,结合滞环控制响应速度快和重复控制无稳态误差的特性,提出了一种新型复合型控制方法作为大功率单独注入式有源电力滤波器的电流跟踪控制方法,并对上述控制方法的快速性、器件产生高频毛刺含量和控制误差等方面进行了比较分析。结果表明这种新型复合控制方法能使逆变器的输出迅速、准确地跟随参考信号的变化,同时还具有良好的自适应性和鲁棒性。
As the compensation current generated in the active filter is mainly composed of the distortion current of each harmonic, the active filter and its current controller must be able to track the distorted current signal with steep change, so the active filter The filtering effect of the device depends very much on its control performance. For this reason, taking the high power single injection active power filter as an example, a new composite control method is proposed by establishing the mathematical model and combining with the characteristics of hysteresis control fast response and non-steady error of repetitive control High-power single-injection active power filter current tracking control method, and the rapidity of the control method, the device generates high-frequency glitch content and control error were compared and so on. The results show that the new composite control method can make the output of the inverter quickly and accurately follow the change of reference signal, and it also has good adaptability and robustness.