A New Design Method for (6k±1)-Order Repetitive Control Used in Harmonic Current Source

Repetitive control (RC) method can improve the tracking precision compared with traditional controller, However, the internal model structure determines that the dynamic response of RC will have a fundamental time delay T0. To improve the response speed of traditional RC controller, $(6\mathrm{k}\pm 1)$-order RC structure is used in control which can reduce the data memory and improve the tracking speed, but the new structure will inevitably increase the difficulty of the stability judgement. In this paper, a new design method is proposed for the parameter design of $(6\mathrm{k}\pm 1)$-order RC strategy, simulation and experiments of $(6\mathrm{k}\pm 1)$-order method is performed inharmonic current source (HCS), which shows the validity and advantages of the proposed new design method.