一种基于电压空间矢量的有源滤波器滞环电流控制新方法

A Novel Hysteresis Current Control Method for Active Power Filter Based on Voltage Space Vector

为提高有源滤波器的电流跟踪性能,提出一种基于电压空间矢量的滞环电流控制新方法。该方法利用电流误差矢量与参考电压矢量的空间分布给出最佳的电压矢量切换,使电流误差控制在滞环宽度以内;采用电压空间矢量消除相间影响,并且其实现简单,无需复杂的矢量变换。在降低开关频率条件下,既有较好的电流响应速度,又能有效限制电流误差,改善电流跟踪性能。实验结果证明该方法的正确性和可行性。

In order to improve the current tracking performance of active power filter, in this paper, a novel hysteresis current control method based on voltage space vector is proposed. This method gives the best suitable switching of voltage vector using the space distribution of current error vector and reference voltage vector, and then controls the current error below the hysteresis width. Voltage space vector is introduced into the control system to eliminate the phase interference, and it can be realized simply without complicated vector transform. The proposed method has fast current response, and can limit the current error and the switching frequency with good current tracking performance. The experimental results show that the proposed novel method is valid and feasible.