Anti-Disturbance Current Regulation Strategy for LCL-Filtered Single-Phase Inverters Based on Constant Funnel Bang-Bang Control

This paper proposes a constant funnel bang-bang control based current regulation strategy for LCL-filtered single-phase inverters subject to unknown disturbance. First, the dynamic mathematical model of the inverter system is established in a single-input, single-output form. Accordingly, the bang-bang current controller (BCC) is designed, which can guarantee global stability, produce high-quality output current, and exhibit strong robustness against disturbances, as it does not depend on the accurate system model. Simulation results validate the effectiveness of the proposed method.