Affiliation of Author(s):自动化学院
Journal:Conf Proc IEEE Appl Power Electron Conf Expo APEC
Abstract:The model predictive control (MPC) predicts all the possible behaviors and selects an optimal switching state which minimizes the predefined cost function at the next step, and is emerging as a powerful control method in power electronics. However, for a single phase T-NPC inverter with the conventional MPC method, only three different voltage vectors can be generated, which significantly impairs the system performance. Therefore, aiming at improving the current quality, a real-time duty ratio calculation scheme based on the MPC control is proposed. Moreover, the error of the two capacitor voltages is embedded into the current reference for balancing the capacitor voltage. The improved MPC control strategy achieves the balanced capacitor voltage and the minor steady-state error by providing another control degree of freedom. The effectiveness of the proposed MPC strategy is validated on a T-NPC LCL-filtered inverter by both the simulation and experimental results. © 2017 IEEE.
Volume:0
Page Number:3614-3618
Translation or Not:no
Date of Publication:2017-05-17
Date of Publication:2017-05-17