Adaptive Model Predictive Control of Current Interharmonics in PV System

This paper proposes a novel adaptive model predictive control (MPC) for current interharmonics in photovoltaic (PV) system. In this method, a two-step prediction model for the output current and interharmonic currents of PV system is firstly derived. Then, MPC is used to realize the inverter control and interharmonic suppression at the same time. In addition, enhanced suppression of interharmonics at specific frequencies is realized by introducing a key parameter adaptive adjustment mechanism. Simulation results show that the proposed interharmonic suppression strategy can effectively reduce the interharmonic amplitude with a suppression ratio of up to 75%. And adaptive parameter adjustment can significantly improve the suppression effect of specific interharmonics by more than 26%.