A novel adaptive control for three-phase inverter

This paper proposes a simple and effective adaptive voltage control for the three-phase inverter with LC filter. In the proposed adaptive control, the control input is artificially defined as two types: power control input and signal control input. A state feedback, load current feedforward and reference feedforward are imposed to the power control input to improve the dynamic performance. A dynamic adaptive gain of the reference feedforward is proposed as the signal control input to reject the parameter uncertainty and disturbance. The proposed control method establishes excellent voltage regulation such as fast transient response, zero steady-state error, and low total harmonic distortion. The simulation and experimental results verify the good performance and robustness of the proposed adaptive control.