A Novel Droop Control for Enhanced Performance of Grid-Forming Distributed Energy Resources

Abstract

The growing demand for reliable distributed generation (DG) systems promoted multiple advancements in grid-forming (GFM) control strategies applied to distributed energy resources (DERs). This paper proposes a novel 'logistic function-based droop control', designed to improve the performance of GFM DERs. By utilizing the distinctive features of the logistic function that include an S-shaped curve, flexibility, and gradual ramp-down, the proposed control is designed to enable the flexible and reliable operation of DERs integrated into a microgrid. This control utilizes the inherent benefits of logistic functions to address the challenges associated with conventional droop control with minimal control complexity, particularly, during transient conditions and sudden load changes. Through comprehensive analysis and simulations, the efficacy of the proposed 'Logistic function-based droop control' is demonstrated in comparison to the traditional droop control. The results show the effectiveness of the proposed droop in substantially enhancing the operation of GFM DERs.