Load Profile‐Based Setpoint Design for Piecewise Droop Controller to Mitigate Current Sharing Error in Dual Active Bridge System

Effective load current distribution is a fundamental aspect of ensuring a stable and efficient DC microgrid operation particularly when utilizing dual active bridge converters. In order to construct an improved piecewise setpoint, this research involves a thorough analysis of the statistical distribution of load profiles and the intrinsic properties of a two‐segment piecewise droop controller. Furthermore, a thorough comparison analysis of linear and exponential droop‐based approaches is carried out in this paper. To assess the proposed two‐segment piecewise droop controller, several simulations and hardware‐in‐loop scenarios are carried out. Additionally, the conventional discrete piecewise droop control method is compared with the proposed method. Notably, with the proposed method, paralleling dual active bridge converters in a DC microgrid clearly demonstrates a significant improvement in current sharing within a specific operating range. © 2024 Institute of Electrical Engineers of Japan and Wiley Periodicals LLC.