Wind turbine generator wide-frequency-band additional damping control method

Abstract

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.

Description

technical field [0001] The present application relates to the field of electric power system control, and in particular to a method for controlling wind turbines with wide-band additional damping. Background technique [0002] The research on vibration suppression of traditional power grids has been relatively mature, and related devices and measures, such as the damping control measures of adding power system stabilizers to power units, have been widely used in power grids and achieved remarkable results. With the penetration of new energy in power grids The rate is gradually increased, resulting in a variety of oscillation modes. [0003] When the oscillation of the traditional power grid occurs, the new energy unit will also produce corresponding oscillation problems, and the interaction of a large number of power electronic equipment will also cause new oscillation problems. The damping control research of wind turbines is mainly aimed at a certain type of oscillation pr...

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Problems solved by technology

[0004] However, with the gradual increase of the penetration rate of new energy in the power grid, the current situation is that there are multiple oscillation modes in the new energy system with high penetration rate. The existing damping control measures show positive damping effects in certain oscillation modes, while in other oscillation modes The negative damping effect may be shown under the current situation. The traditional damping measures for a certain type of oscillation cannot meet the needs of the stable operation of the current power grid, and there are obvious limitations in the suppression function.

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