Self-adaptive primary frequency modulation method for wind storage combined system with long time scale

The invention discloses a self-adaptive primary frequency modulation method for a wind storage combined system with a long time scale, which combines the unique advantages of two frequency modulation resources of a double-fed induction generator (DFIG) and a super capacitor, considers the long-term continuous fluctuation working condition of power grid frequency, and provides a super capacitor and DFIG combined'energy recycling 'frequency modulation strategy. The required energy storage configuration capacity can be controlled at a low level, and the primary frequency modulation requirement of a power grid is met at low cost. On the basis, the state of charge (SOC) of the super capacitor is comprehensively considered, a Logistic function is introduced to correct the distribution coefficient of the DFIG and the super capacitor in real time, smooth switching between energy storage resources of the super capacitor and the DFIG can be achieved, the situation of over-charging and over-discharging of the super capa