Method and equipment for determining vibration displacement of tower top of wind generating set

Abstract

The invention provides a method and equipment for determining the vibration displacement of the tower top of a wind generating set. The method comprises the following steps of acquiring the real-timeposition of a first preset monitoring point on the top of a cabin in real time through a satellite positioning system; determining the real-time position of a second preset monitoring point on the basis of the real-time position of the first preset monitoring point; determining the real-time position of a tower top center based on the real-time position of the first preset monitoring point and thereal-time position of the second preset monitoring point; and determining the vibration displacement of the tower top center according to the initial position of the tower top center under the statethat the tower frame has no internal stress and the real-time position of the determined tower top center. According to the method and the equipment for determining the vibration displacement of the tower top of the wind generating set, the accuracy of measuring the vibration displacement of the tower top of the wind generating set can be improved.

Description

technical field [0001] The present invention generally relates to the technical field of wind power generation, and more specifically, relates to a method and equipment for determining the vibration displacement of a tower top of a wind power generating set. Background technique [0002] Wind turbines operate outdoors at high altitudes, and the tower not only bears the weight of the wind turbine itself but also bears wind loads, and the loads are relatively complicated. Usually, in order to invert the load on any section of the tower, it is necessary to measure the vibration displacement of the tower top. [0003] At present, displacement vibration sensors can be used to measure the vibration displacement of the top of the tower, but the low frequency characteristics of the displacement vibration sensor are not good, and the vibration frequency of the tower of the wind turbine is just in the low frequency range, resulting in poor measurement accuracy. In addition, the displ...

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Problems solved by technology

[0003] At present, the displacement vibration sensor can be used to measure the vibration displacement of the tower top, but the low frequency characteristics of the displacement vibration sensor are not good, and the vibration frequency of the tower of the wind turbine is just in the low frequency range, resulting in poor measurement accuracy

In addition, the displacement vibration sensor can only measure the relative displacement of the tower top relative to its equilibrium position, but cannot measure the absolute displacement of the tower top relative to the center of the tower bottom

[0004] In addition, the laser vibrometer can also be used to measure the vibration displacement of the tower top, but the laser vibrometer can only measure the displacement of one point at a time, and cannot simultaneously invert the load of multiple sections. In addition, the laser vibrometer High cost, not suitable for batch equipment, and difficult to install

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