Research on Drimary Frequency Regulation Strategy of Doubly-Fed Wind Turbine Based on Energy Storage Fuzzy Control

Currently, the DFIG primary frequency control method based on the traditional energy storage is more widely studied and efficient. However, the potential overcharge and discharge of the energy storage battery when the energy storage is involved in frequency control is ignored, causing some safety problems and affecting the primary frequency control effect of the plant. To solve these issues, it takes frequency change and SOC of energy storage batteries together as fuzzy control input, and uses fuzzy control theory to control energy storage batteries to participate into primary frequency regulation control strategy of grid. The new control strategy adaptively adjusts the output power of the energy storage system and effectively avoids overcharge and overdischarge of the energy storage system.