A nk pm m-Order Harmonic Repetitive Control Scheme with Improved Stability Characteristics

In many applications, the ability to impose periodic reference signals is required for the good operation of the system, making repetitive controllers viable candidates for performing this task. If the reference signal contains only a periodic set of the harmonic components, conventional repetitive controllers can be substituted by nk pm m RC, which are advantageous in terms of response time and memory storage. In this sense, this article proposes a nk pm m RC with better stability characteristics when compared with the previously presented solutions in the literature. The proposed controller was validated through experimental results using a three-phase active power filter.