Method for calculating gradient of wind generation set tower

Abstract

The invention discloses a method for calculating the gradient of a wind generation set tower. The method includes the steps that a relation expression between the gradient of the tower, the wind speed and the pitch angle is established and a superposition method is adopted for calculating the offset of the tower; when the wind speed v is smaller than or equal to 12 m / s, an adaptive least squares algorithm is adopted for fitting a function relationship between the wind speed and the gradient of the tower, and therefore the gradient of the wind generation set tower is acquired when the wind speed is zero or close to zero; an equation is solved under the operation condition that the wind speed is larger than the rated wind speed; when the inequation that 12 m / s<V<=25 m / s is satisfied, a multielement nonlinear regression analysis method is adopted for acquiring a relationship between the gradient, the wind speed and the pitch angle, a quadratic polynomial regression model is established, parameters of a multielement nonlinear regression model are estimated through a least square method, and the gradient is acquired. The method has the beneficial effects that the gradients of the wind generation set tower under different wind speed conditions can be acquired and calculation results are accurate.

Description

technical field [0001] The invention belongs to the technical field of wind power, and relates to a method for calculating the inclination of a wind turbine tower. Background technique [0002] The tower body of the wind turbine mainly plays a supporting role in the wind turbine. The tower itself bears complex and changeable loads such as its own gravity, wind thrust, and impeller torque. At the same time, it is affected by meteorological and geological factors, making the wind turbine in During the operation, the tower body, as an elastic rigid body, will sway to a certain extent. During the long-term operation, the base of the tower will cause settlement and other phenomena due to factors such as the tower body swaying, which will cause the tower body to deflect. Excessive inclination of the tower body will affect the normal operation of the wind power generating set, and even cause safety accidents in severe cases. Therefore, it is very necessary to develop a calculatio...

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Problems solved by technology

[0006] The purpose of the present invention is to provide a method for calculating the inclination of the tower body of a wind turbine, which solves the problem of only obtaining a relationship between the offset and the wind speed in the current research on the relationship between the offset and the force of the tower body of the wind turbine. relationship, and did not consider the change of its force under different wind speeds and the relationship between the inclination and the pitch angle

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