Optimized Unsymmetrical Per-phase Droop for Soft Line Switching of Reconfigurable Unbalanced Inverter-Based Islanded Microgrid

The legacy of power distribution systems is evolving towards more flexible and dynamically reconfigurable microgrids, which substantially increases line-switching actions. This may introduce undesirable transients, poor reliability, deteriorated quality, significant wear tear in switching devices. Frequent line unbalanced inverter-based islanded microgrids (UIBIM). paper proposes an optimized unsymmetrical per-phase droop-controlled approach to mitigate the influence during UIBIM reconfiguration partitioning. To determine Optimal Transitional Droop Settings (OTDS), a new mathematical formulation modeled minimize flow at location(s). Given nature system, proposed droop will be for each phase independently. activation start end instants OTDS are selected reduce dynamics due transition between states switching. superiority effectiveness applying assessed via Matlab/Simulink, utilizing case studies implemented on 6-bus IEEE 34-bus systems. simulation results reveal that can independently current process by nearly 98%. Furthermore, transient voltage significantly reduced.