An Automatical Parameter Droop Control for HESS in Hybrid AC/DC Microgrid

With more attention to sustainable development, renewable energy generation is widely used in the region with abundant solar energy and wind energy. However, they also bring security problems to power network quality. In order to improve the power quality and ensure the stability of renewable energy generation, this paper proposes an automatical parameter droop control (APDC) method that automatically adjusts parameters. This control algorithm combines the improved virtual resistance capacitor control with the improved droop control. Firstly, a typical renewable energy microgrid model is proposed. Secondly, a power differential term and a DC bus voltage correction term are added for inverter droop control. Finally, the output power of energy storage units is timely adjusted according to the change of the state of charge (SoC). The simulation results show that the control method has faster response than traditional droop control and increases stability of DC grid.