A wind turbine load control method, system, terminal and storage medium based on wind wheel thrust force

By using a nonlinear feedback controller based on wind turbine thrust and a Kalman filtering algorithm, the pitch angle is dynamically adjusted, solving the problem of wind turbine thrust control in a highly turbulent environment. This optimizes the load on key components of the wind turbine, reduces equipment costs and foundation costs, and improves control accuracy and stability.

CN115681004BActive Publication Date: 2026-07-10CRRC WIND POWER(SHANDONG) CO LTD
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Patents(China)
Current Assignee / Owner
CRRC WIND POWER(SHANDONG) CO LTD
Filing Date
2022-12-07
Publication Date
2026-07-10

AI Technical Summary

Technical Problem

Existing wind turbine control methods struggle to effectively control tower top thrust and foundation load during the rotor speed ramp-up phase, leading to overload of critical components and impacting equipment costs and foundation construction. Furthermore, current technologies struggle to effectively control rotor thrust load in extreme environments, particularly under extreme gust conditions, resulting in excessive loads on critical structural components and increased design and manufacturing costs.

Method used

A nonlinear feedback controller based on wind turbine thrust is adopted to optimize the fatigue and ultimate load related to wind turbine thrust by dynamically adjusting the pitch angle. The Kalman filter algorithm is used to estimate the wind turbine thrust load, and the desired wind turbine thrust load is obtained by low-pass filtering and spectrum analysis. A nonlinear feedback controller is established for feedback control, and the pitch angle is dynamically adjusted to control the load within the safe threshold range.

Benefits of technology

It effectively reduced the ultimate and fatigue loads related to the thrust of the wind turbine rotor, improved the operational stability of key components of the wind turbine, reduced equipment costs and foundation costs, and enhanced the control accuracy and efficiency of the wind turbine.

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Patent Text Reader

Abstract

The application provides a wind turbine load control method based on wind wheel thrust, relates to the wind turbine regulation and control field, and obtains wind wheel thrust load; the wind wheel thrust load is low-pass filtered to obtain expected wind wheel thrust load; the cut-off frequency Wc of the filter is selected by performing spectrum analysis on a wind speed signal; the cut-off frequency selection method is that the cut-off frequency Wc of the thrust load low-pass filter is selected as a frequency threshold value lower than a preset frequency threshold value and a wind energy ratio reaching 90% of total wind speed spectrum energy; the expected wind wheel thrust load is taken as a control target, feedback control is performed on actual wind wheel thrust, a nonlinear feedback controller is established, and the pitch angle is dynamically adjusted according to the amplitude of the deviation of the actual thrust load from the expected wind wheel thrust load. The method can dynamically adjust the pitch angle through the nonlinear feedback controller, and the purpose of optimizing the fatigue and limit load related to the wind wheel thrust of the wind turbine is achieved.
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