Wind turbine, pitch angle measurement system and method for a wind turbine

Abstract

The present invention relates to wind turbines, pitch angle measurement systems and methods for wind turbines. The measuring system comprises a first angular velocity sensor (130) for measuring a first angular velocity () about a first sensor axis (e1) fixedly connected to the blade (100) in a first predetermined direction, the first predetermined direction being selected to produce a first projection of the main axis of rotation (32) onto the first sensor axis (e1) for measuring a second angular velocity (β) about the second sensor axis (e2) and fixed in a second predetermined direction Ground connected to the second angular velocity sensor (140) of the blade (100), the second predetermined direction is selected to produce a second projection of the main axis of rotation (32) onto the second sensor axis (e2), the first sensor The axis (e1) and said second sensor axis (e2) are linearly independent, and the first calculation unit (160) calculates the pitch angle (Θ1c) from the first angular velocity () and the second angular velocity (β).

Description

technical field [0001] The present application relates to a wind turbine and a measurement system for determining at least the blade pitch angle of a blade of a wind turbine relative to a hub. The invention also relates to a method for determining the pitch angle of at least one blade of a wind turbine. Background technique [0002] Wind turbines harvest energy from the wind to generate electricity. Use one or more blades to change the aerodynamic energy in the wind into rotational power that drives a generator. In order to maximize energy harvested during a year's operation at a particular location, the maximum power level of the generator is chosen to be well below the aerodynamic energy value associated with the maximum wind speed expected at that location. The wind speed at which rotational power is extracted that matches the maximum generator power is called the rated speed of the wind turbine. [0003] Since the rated speed is well below the maximum wind speed at th...

AI Technical Summary

Problems solved by technology

One disadvantage is the susceptibility to mechanical failure in the drive part connecting the body of the blade to the inner working parts of the encoder

The second disadvantage is the loss of accuracy due to wear and wear in the drive

A third disadvantage is the loss of accuracy when the encoder and drive are out of alignment after a maintenance technician steps on the unit by mistake during maintenance

Therefore, the calculation of the rotor speed is time-delayed or time-averaged, and the sum of the quantities is not measured instantaneously

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