Primary frequency regulation control strategy for electric vehicle aggregation based on charging and discharging margin

Aiming at the problem of insufficient primary frequency regulation resources of power grid in the future, an adaptive control strategy based on charging and discharging margin is proposed for virtual energy storage of electric vehicle aggregation to participate in primary frequency regulation of power grid. Firstly, regulatory and operating range of the electric vehicle is analyzed. Secondly, the primary frequency regulation method of electric vehicle aggregation participating in the power grid is studied. Considering the margin of charging and discharging time and state of charge (SOC), charging and discharging margin index of electric vehicles is designed. Then, an adaptive primary frequency regulation control strategy based on charging and discharging margin is proposed to optimize the droop power of electric vehicles participating in primary frequency regulation, which considers both requirements of primary frequency regulation of power grid and charging, discharging of electric vehicles. Then, the primar