Grid-Forming Converter with Improved Dynamic and Disturbance Rejection Capability

This paper proposes a control strategy for grid-forming converter based on a cascaded control scheme with current and voltage controllers. The theoretical analysis demonstrates the possibility of obtaining almost zero steady-state error for the current loop utilizing only a proportional controller with a magnitude and lead compensation functions to achieve high bandwidth. For the voltage loop, a disturbance input decoupling function is proposed to obtain better dynamic response for the converter under load changes. Simulations results prove the effectiveness of the proposed strategy.