Damping Sensitivity Based Droop Control Strategy for Self-Stabilizing Microgrid Realization and Improved Reactive Power-Sharing

This paper proposes an event-triggered adaptive droop control strategy that tunes the reactive droop coefficient in real-time to maintain microgrid stability and enhance reactive power-sharing. First, a damping sensitivity formula is presented to quantify the impact of each inverter on system damping relative to changes in its reactive droop coefficient. Based on this formula, the proposed strategy continuously estimates the damping sensitivity for each inverter and updates the reactive droop coefficient accordingly. This approach ensures that each inverter contributes to grid stabilization in proportion to its own impact on system damping. Simulation results confirm the efficacy of the proposed droop control scheme in enhancing inverter reactive power-sharing and microgrid stability.