Analysis and design of repetitive controlled Power Electronic Load Simulator with high dynamic performance

In this paper, a digital repetitive control strategy is proposed to achieve zero tracking error for Power Electronic Load Simulator (PELS). The proposed control scheme is of “plug-in” structure: a plug-in digital repetitive controller plus a conventional controller (e.g., P or PD controller). The design of the plug-in repetitive learning controller is systematically developed. The stability analysis of overall system is discussed. A repetitive controlled PELS is given as an application example. Desired current can be ensured under parameter uncertainties and disturbances. Simulation results are provided to testify the effectiveness of the proposed control scheme.