The synchronous reference frame proportional-integral (SRFPI) control possesses the feature of zero steady-state error with employing PI regulators. Even if the accurate mathematical model of system is unacquainted the linear active disturbance rejection control (LADRC) can still achieve excellent anti-interference ability. In this paper, a modified voltage control strategy for single-phase inverter based on compound SRFPI and LADRC is proposed, which inherits the advantages of the two controllers. Theoretical analysis as well as the feasibility of the controller has been effectively proved by simulation with MATLAB/Simulink and experiments. The research results show that the system achieves low total harmonic distortion (THD), little steady-state error and voltage tracking error, and fast transient response.

single-phase inverter;synchronous reference frame proportional-integral (SRFPI);linear active disturbance rejection control (LADRC);total harmonic distortion (THD);steady-state error