An improved three-vector coordination robust model predictive control for 3P-2L inverters

Abstract

This paper introduces an improved three-vector robust coordination model predictive control for three-phase two-level (3P-2L) grid-connected inverters. Initially, an improved three-vector model predictive control methodology is suggested that broadens voltage coverage, minimizes current ripple, and employs non-contiguous vector state synthesis. Subsequently, a robust predictive control methodology is devised based on the sliding mode control theory. By optimizing the cost function in the traditional model predictive control, it allows the inverter to sustain stable functionality despite parameter discrepancies. Moreover, a sophisticated coordination controller is implemented that facilitates smooth transition between the proposed improved three-vector model predictive control and robust model predictive control, ensuring effective adaptability in diverse scenarios. Eventually, through simulation and experimentation, the efficacy of the proposed methodology is verified.