Abstract: With the continuous improvement of the penetration rate of wind turbines，in order to suppress the

voltage/frequency fluctuations of the doubly-fed induction generators（DFIGs）after grid-connected due to their own active power output fluctuations，aDFIGinertia support and primary frequencymodulation control based on distributed energy storage was proposed. On this basis，the reactive power and voltage regulation capability of DFIG units was analyzed，and a coordinated control scheme of active power-frequency and reactive power-voltage was proposed.Finally，the simulation experiment shows that the DFIG based on distributed energy storage fully participates in the system frequency regulation，and the active power output by the wind turbine can respond to the active load fluctuation in time，improve the primary frequency regulation ability of the system. In addition，the output reactive power can also be adjusted according to the fluctuation of the voltage，which can significantly improve the voltage fluctuation of the generator port，and provide a new idea for the optimization and improvement of the DFIG control strategy.

      Key words: doubly-fed wind turbine；virtual inertia；primary frequency；voltage/frequency coordinated

control；distributed energy storage