Comparative Study of Model Predictive Control for Modular Multilevel Converters with Separate and Decoupled Circulating Current

The model predictive control (MPC) for the modular multilevel converter (MMC) has drawn attention among researchers in recent years due to its straightforward implementation, ability to control multiple objectives, and excellent dynamics response. The output current, circulating current and arm voltage are the three key control objectives of MPC for MMC. The performance of MPC highly depends on the prediction model of these control objectives. In this paper, the separate and decoupled prediction models of circulating current are proposed for MPC. Moreover, the influence of the common-mode voltage is also analyzed. Finally, the two proposed models are validated and compared by simulation and experimental results.     «

The model predictive control (MPC) for the modular multilevel converter (MMC) has drawn attention among researchers in recent years due to its straightforward implementation, ability to control multiple objectives, and excellent dynamics response. The output current, circulating current and arm voltage are the three key control objectives of MPC for MMC. The performance of MPC highly depends on the prediction model of these control objectives. In this paper, the separate and decoupled prediction...     »