Abstract
In a typical AC micro grid, multiple inverters of distributed power supply are connected to the large grid through common connection points. In order to simulate the characteristics of synchronous generator with parallel structure without interconnection line, droop control is widely used in the control system of grid connected inverter to realize the power distribution of distributed power supply. In this paper, the droop control strategy of AC microgrid is studied. Aiming at the power distribution error and voltage steady-state deviation existing in the droop control strategy of traditional AC microgrid with constant droop coefficient, a new dynamic droop control scheme is proposed. The active droop coefficient and angle frequency are connected, the reactive droop coefficient and voltage are connected, and the active and reactive droop coefficients are adjusted dynamically in real time to increase the power Distribution accuracy and voltage deviation reduction. The above control strategy is verified by Matlab/Simulink simulation to improve the transient performance of microgrid.
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