Hybrid energy storage segmented virtual rotational inertia frequency division control method and device

The invention provides a hybrid energy storage segmented virtual rotational inertia frequency division control method. The method comprises the steps that a hybrid energy storage VSG rotor mechanical equation is acquired; the virtual rotational inertia of the VSG rotor mechanical equation is expressed in a segmented mode according to the frequency, and the virtual rotational inertia is decomposed into virtual rotational inertia expressions of all ends during high-frequency disturbance; establishing a super capacitor charge state expression; under the condition that the capacity of the super capacitor is insufficient, according to the virtual rotational inertia expression of each end during high-frequency disturbance, and respectively obtaining a virtual rotational inertia coordination control equation of each end when the charge state expression of the super capacitor is in the discharge limit, a virtual rotational inertia coordination control equation of each end when the charge state expression of the super