| Abstract |
A method to suppress the circulating current in Modular Multilevel Converter using the repetitive control is discussed. The parallel and series structure of repetitive controller is investigated. It is shown that the performance of the repetitive controller and resonant controller are comparable at high bandwidth, however, at low bandwidths the performance of the repetitive controller deteriorates. The controllers are implemented in Xilinx SoC, where the repetitive control structure is found to give similar steady state error while maintaining lower resource use when implemented with 16- and 32-bit word length compared with the proportional resonant control. |
