Offshore wind turbine generator load control system based on data driving

Abstract

The invention provides an offshore wind turbine generator load control system based on data driving. The offshore wind turbine generator load control system comprises a trailing edge flap, a signal acquisition module, a signal conditioning module, an upper computer and an electric servo module. The method has the beneficial effects that the blade root bending moment, the foundation pitching and the foundation yawing are adjusted through the trailing edge flaps, and the response speed of the method is obviously higher than that of traditional variable pitch control. According to the method, the time-varying linearization data model is constructed by using the online input / output data information of the floating type offshore wind power system, and the coupling relationship among the blade load, the basic vibration and the wind wheel rotating speed is considered in the corresponding controller design, so that the precision is higher than that of a simplified mechanism model in the past; and control errors caused by unconsidered model dynamic characteristics in a simplified mechanism model can be made up. Frequency decoupling is carried out on the control system and an original complete machine master control through a filtering scheme, the effect of reducing the blade fatigue load and basic vibration at the same time can be achieved on the premise that power fluctuation is not sacrificed, normal operation of the master control system is not affected, and the method is easy to achieve in new and old units.

Description

technical field [0001] The invention relates to the technical field of offshore wind power, in particular to a data-driven load control system for offshore wind turbines. Background technique [0002] In recent years, the rapid development of deep-sea floating offshore wind power has become one of the supporting forces in the global energy transformation development strategy. Correspondingly, floating offshore wind turbines are the key technology to develop the deep-sea wind power market, and floating foundations introduce additional degrees of freedom for offshore wind turbines, which enables the coupling of blade load-foundation vibration, rotor speed and foundation vibration under the combined action of wind and waves. The relationship is serious, which brings great challenges to the safe and reliable operation of offshore wind turbines. [0003] For floating foundation vibration, the existing technologies mainly include two schemes of mass tuning damper and pitch contro...

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Problems solved by technology

[0005] To sum up, for floating wind turbines, because the existing technologies do not comprehensively consider the coupling relationship between blades, transmission chains, foundations, and rotational speeds, the effects of fatigue load and power output control are not good.

[0006] Regarding the vibration control of floating foundations, the existing mass-tuned dampers have very limited response ability to large disturbance external loads; the existing pitch control for floating foundation vibrations does not consider the thrust coupling relationship between the wind rotor speed and foundation vibration; the existing The multi-input and multi-output pitch controller considers the thrust coupling relationship between the wind rotor speed and the foundation vibration, but based on the simplified mechanism assumption based on rigid body dynamics, it does not consider flexible features such as blades and towers, so its fidelity remains to be verified, especially Especially for offshore wind power systems with negative damping factors, the relevant dynamic model characteristics will cause large control errors; the existing technologies are at the expense of power fluctuations, and the coupling relationship between blade load and foundation vibration is not considered; in addition, the existing Technical responses are slow

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