Abstract

The application of virtual synchronous generator (VSG) in new energy grid connected power generation and microgrid application has become a research hotspot. When VSG technology is used for primary frequency regulation control of energy storage, it can be not solved the possibility that the frequency and voltage of microgrid will change greatly. Due to sudden increase or drop of load or adjustment of new energy power generation power under isolated operation mode of microgrid which will eventually lead to failure of microgrid re-grid operation. The secondary frequency modulation control is proposed to reestablish the active power frequency balance point and reactive power voltage balance point of the microgrid system under the island operation mode. Finally, the effectiveness of the proposed control strategy is verified by building a simulation model of wind, light and storage combined microgrid on the simulation platform.

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