Device and method for monitoring structural deformation of tower of wind turbine generator

Abstract

The invention discloses a device and method for monitoring structural deformation of a tower of a wind turbine generator. The device comprises a laser disposed in the tower of the wind turbine generator and a photoelectric receiver disposed at the top of the tower, and the photoelectric receiver is perpendicular to the horizontal plane and is fixed at the inner wall of the top of the tower. The photoelectric receiver is arranged at the side, opposite to the laser, in the tower. The contact position of the tower of the wind turbine generator and a wind turbine generator bottom foundation is not deformed, the transverse displacement of the contact position of the tower of the wind turbine generator and a wind turbine generator impeller and a generator is maximum, and certainly, even if the displacement deformation is maximum, the numerical value is very small and is difficult to measure; and the laser is installed in the tower, the environment in the tower enables a detection device to be prevented from being affected by wind and sun at ordinary times, fatigue failure of components of the device is avoided, measurement based on laser signals is more accurate and reliable, and the components are arranged in the tower and cannot be affected by the external environment. Based on the device, accurate monitoring data can be provided for deformation calculation.

Description

technical field [0001] The invention relates to the field of wind turbine operation monitoring, in particular to a monitoring device and method for structural deformation of a wind turbine tower. Background technique [0002] During the operation of the wind turbine, its tower not only bears the gravity load of the wind turbine host and the impeller, but also bears the lateral thrust load due to the impeller and the host. At the same time, because the wind turbine itself is a rotating machine, it is affected by the alternating wind speed and turbulence of the incoming flow, which makes the tower bear complex and variable loads such as gravity, lateral thrust, twist and bending moment. The tower structure will undergo a certain amplitude of deformation and vibration under complex and variable loads. Under alternating loads, the amplitude and frequency of deformation not only affect the power generation efficiency of wind turbines, but also cause local permanent damage at som...

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Problems solved by technology

[0005] In view of the above-mentioned problem that the traditional contact strain measuring device is easy to be damaged under extreme environmental conditions, the present invention proposes a method of using a reflected laser light source to monitor the deformation of the wind turbine tower structure, which is suitable for all harsh environments

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