New Mesh Configurations With Decentralized Droop Control Method for DC Microgrids

This article proposes new, practical, and scalable mesh configurations for dc microgrids. The new mesh configurations are inspired by the concepts in graph theory. A decentralized secondary droop control method without involving communication complexity is also presented in this article. The proposed control method eliminates the limitations of the conventional droop control method in the scenarios where the cable resistances in a dc microgrid system cannot be neglected. The new mesh configurations with the proposed control method achieve accurate current sharing among all the converters. The effectiveness and performance of the proposed control method are validated using circuit simulations and hardware-based experiments on existing and proposed configurations of multi-converter dc microgrid systems.