The invention provides a wind
turbine generator wide-frequency-band additional damping control method which comprises the steps of carrying out oscillation mode
decomposition through Chebyshev filtersof different frequency bands and according to the rotating speed difference of a draught fan, and obtaining the oscillation components of all the frequency bands; respectively carrying out adaptive
variational mode decomposition on the oscillation component of each
frequency band to extract an oscillation mode
signal of each
frequency band; respectively carrying out a Prony
algorithm on the oscillation
modal signals of each
frequency band to extract the oscillation
modal parameters of each frequency band; according to the oscillation
modal parameters of each frequency band, based on a lead-
lag correction model, performing optimization calculation by using a
quantum particle swarm algorithm to obtain the optimization
control parameters of damping control of each frequency band; integratingthe output of the additional damping controllers of
multiple frequency bands, and superposing the final control quantity to a current
inner loop controlled by a wind
turbine generator, thereby inhibiting different oscillation
modes. according to the method, the damping controllers are designed respectively, so that the independence of different types of damping functions is ensured, and the crossinfluence of different types of damping inhibition is reduced.