Method and device for measuring dynamic deflection of wind power generation tower

Abstract

The invention discloses a method and device for measuring the dynamic deflection of a wind power generation tower, and belongs to the technical field of wind turbine deflection measurement, and the method for measuring the dynamic deflection specifically comprises the following steps: step 1, deploying a sensor; step 2, data acquisition; step 3, data processing; and step 4, deflection calculation. Compared with other deflection measurement methods, the QYG01-1 type inclinometer is mounted on the surface or inside the tower drum, and the QYG01-1 type inclinometer is convenient to mount, low in cost, free of static reference points and free of environmental influence such as weather, so that measurement under any condition is facilitated, and in addition, a high-precision dynamic transverse rotation angle signal is extracted based on a wavelet lifting decomposition method, so that the deflection measurement precision is improved.

Description

technical field [0001] The invention relates to the technical field of wind turbine deflection measurement, in particular to a method and device for measuring the dynamic deflection of a wind power generation tower. Background technique [0002] After retrieval, Chinese Patent No. CN101813055A discloses a wind turbine with blade tip deflection detection. The invention measures the blade tip deflection of the wind generator by measuring the horizontal distance between the blade tip of the tower and the tower with a rangefinder. Although the invention has simple equipment, convenient operation, and low cost, it needs a static reference point, which is easily affected by the external environment, which easily leads to low accuracy of its deflection measurement results; wind power generator refers to the conversion of wind energy into mechanical work, Mechanical work drives the rotor to rotate, and finally outputs AC power equipment; wind turbines generally consist of components...

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Problems solved by technology

[0002] After retrieval, Chinese Patent No. CN101813055A discloses a wind turbine with blade tip deflection detection. The invention measures the blade tip deflection of the wind generator by measuring the horizontal distance between the blade tip of the tower and the tower with a rangefinder. Although the invention has simple equipment, convenient operation, and low cost, it needs a static reference point, which is easily affected by the external environment, which easily leads to low accuracy of its deflection measurement results; wind power generator refers to the conversion of wind energy into mechanical work, Mechanical work drives the rotor to rotate, and finally outputs AC power equipment; wind turbines generally consist of components such as wind rotors, generators (including devices), steering devices (tails), towers, speed-limiting safety mechanisms, and energy storage devices; Wind turbines are generally installed in areas rich in wind energy resources and work in harsh environments, such as high and low temperature, typhoons, lightning strikes, sandstorms, and various corrosions; among them, the tower is one of the important components of wind turbines. The tower is subjected to high loads and wind field disturbances, and its service life has become a matter of great concern to wind turbine designers; at the same time, the deformation of the tower under dynamic loads has a great impact on the performance of the wind turbine. The wind force or load action or the deflection change during the load process helps to analyze the mechanism of the tower and the structure, and also provides a basis for the design of the strength and stiffness of the tower, which becomes a favorable guarantee for the normal operation of the wind turbine; therefore, the invention of a A method and device for measuring the dynamic deflection of a wind power tower becomes particularly important;

[0003] Most of the existing methods for measuring the dynamic deflection of wind power towers are measured by a rangefinder. Although this type of method has simple equipment, convenient operation, and low cost, it requires a static reference point, which is easily affected by the external environment, which easily leads to deflection measurement. The accuracy of the results is low; therefore, we propose a method and device for measuring the dynamic deflection of wind power towers

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