Load Sensitivity-Based Adaptive Control Strategy for Grid-Supportive Loads in DC Microgrids

The increasing integration of renewable energy sources and the corresponding demand for system flexibility have emphasized the role of Grid-Supportive Loads (GSL) in stabilizing electrical networks. This paper proposes a novel control strategy for GSL in DC microgrids, leveraging the real-time sensitivity to voltage of loads as a dynamic control parameter. In contrast to conventional approaches with fixed tuning, the proposed method enables accurate and adaptive power curtailment in response to prevailing operating conditions. Simulation results in a representative DC microgrid confirm that the strategy ensures predictable, coordinated, and load composition-independent voltage support. Furthermore, the paper compares the conventional voltage-based GSL control with the new power-based approach, highlighting the improved controllability and enhanced ancillary services achieved through the use of load sensitivity.