Super twisting algorithm for power conversion system based on LCL filter

Abstract New energy represented by wind and solar energy is often used in conjunction with energy storage devices due to its changing characteristics. For the three-phase two-level power conversion system (PCS), a super twisting algorithm (STA) control strategy based on the system error model is proposed in this paper. This method can maintain the quality of the grid current when the grid has large harmonics; it can operate in different modes to meet different power factor requirements. The proposed method has high parameter robustness and can resist the parameter drift of components. Theoretical analysis and simulation results prove the correctness of the proposed control strategy.