The decoupling control of a doubly fed pumped storage unit makes its rotor unable to respond to a change of system frequency. To improve the ability of the storage unit to participate in system frequency modulation, a control strategy of coordinated control of rotor kinetic energy and guide vane opening is proposed. First, the mathematical models of pump turbine and doubly fed generator are established, and the optimization process of guide vane opening of the storage unit is analyzed. Secondly, the frequency control link is added to the guide vane opening control of the pump turbine, and the variable difference adjustment coefficient is set according to the available rotor kinetic energy of the unit. This ensures that the unit speed always operates within the safe range. Finally, combined with the frequency modulation advantages of the two controls, the proportional coefficients of the two controls participating in frequency modulation are coordinated according to the frequency change, so as to realize smooth switching between the two. In the system with wind turbine, the simulation results show that the proposed control strategy can improve the frequency response capacity of the unit and the wind power consumption capacity of the power grid under the power generation and electric conditions of the pumped storage unit. This work is supported by the National Key Research and Development Program of China (No. 2016YFB0900100).