A Study of Master-slave Control Strategy in the Isolated Microgrid

When an isolated microgrid runs,the essential problem needed to be solved is to achieve the coordination of multiple distributed power sources.In this paper,a master-slave control strategy is proposed,i.e.,the V-f control method is used in master distributed power to provide a stable voltage and frequency for the microgrid and P-Q control method is applied in the slaves,making full use of renewable energy.With this control strategy,the isolated microgrid can run steadily and with dynamic performance.Simulation shows that the control strategy proposed can coordinate these distributed powers and meet the need of the system voltage and frequency.