Stability of Networking DC Microgrids with Active Loads

Abstract

Direct current (DC) networking microgrids have gained prominence as a means to integrate renewable energy sources and enhance system resilience. However, these types of microgrids heavily rely on communication networks, whose inherent time delays can significantly impact system stability. Additionally, the presence of various, often non-linear load characteristics further complicates the scenario. In this paper, a delay-dependent stability analysis for networking microgrids is presented, with a specific focus on robust operation in the presence of active loads. The formulation also accounts for the uncertain and varying nature of loads within microgrids.The results show that active loads impose more stringent constraints on feasible operating conditions, consensus matrix design, and controller tuning.