Abstract：The participation of wind power and energy storage in primary frequency regulation of power grid

can make better use of the advantages of wind power and energy storage for frequency regulation，which has

gradually become a new trend. However，there are some problems in the coordination of wind power system and

energy storage，such as insufficient utilization of energy storage and mismatch of wind power and energy storage

power. Aiming at the above problems，an improved wind-storage combined primary frequency control strategy was

proposed. Through frequency separation，design of six operating conditions and the switching rules，optimization of wind power and energy storage adaptive droop coefficient，the charging and discharging function of energy storage battery was realized，the power mismatch problem in operating condition switching was improved，and the excessive compensation of power shortage caused by this was avoided. Finally，the wind energy utilization

efficiency and frequency regulation effect of the proposed control strategy and the existing control strategy were

compared through simulation and wind storage experimental platform，and the effectiveness and superiority of the

proposed control strategy were verified.

      Key words：wind-storage combined system；primary frequency regulation；power matching；adaptive droop

coefficient