Method and device for monitoring vibration of engine room of wind generating set

Abstract

The embodiment of the invention provides a method and device for monitoring vibration of an engine room of a wind generating set. The method comprises the following steps that an acceleration signal of the engine room of the wind generating set, and a torque signal and a rotating speed signal of a generator in the current time period are collected; according to the acceleration signal of the engine room, the inherent frequency of the engine room is calculated; according to the torque signal of the generator in the current time period, the fluctuation frequency of the current torque is calculated; according to the rotating speed signal of the generator in the current time period, the fluctuation frequency of the current rotating speed is calculated; if the difference value absolute value ofthe fluctuation frequency of the current torque and the inherent frequency of the engine room as well as the difference value absolute value of the fluctuation frequency of the current rotating speedand the inherent frequency of the engine room are both smaller than a preset triggering resonance threshold value, the situation that torque resonance occurs is judged. Torque resonance is monitored,engine room vibration ultralimit caused by rotating speed-torque fluctuation is also monitored, and the engine room of the wind generating set is advantageously protected.

Description

technical field [0001] Embodiments of the present invention relate to the technical field of wind power generation, and in particular to a method and device for monitoring vibration of a nacelle of a wind power generating set. Background technique [0002] During the power generation process of the wind turbine, the nacelle vibration will be caused by various reasons. Due to wind conditions or self-control reasons, wind turbines sometimes cause speed-torque fluctuations. When the frequency of speed-torque fluctuations is close to the natural frequency of the wind turbine nacelle, it is easy to cause the vibration of the nacelle to exceed the limit. When the vibration of the nacelle exceeds the limit, it will cause harm to the wind turbine. [0003] In the prior art, there is no method for monitoring the excessive vibration of the nacelle caused by the speed-torque fluctuation, so when the vibration of the nacelle caused by the speed-torque fluctuation exceeds the limit, it ...

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Problems solved by technology

[0004] The embodiment of the present invention provides a method that solves the technical problem that there is no method in the prior art to monitor the overrun vibration of the nacelle caused by the speed-torque fluctuation, which makes it inconvenient to protect the nacelle of the wind power generating set

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