Vibration monitor and control method and system for wind turbine generator

Abstract

The invention discloses a vibration monitor and control method and system for a wind turbine generator. The method comprises a collection step, wherein cabin vibration signals of the wind turbine generator are obtained; a calculation step, wherein according to the cabin vibration signals, cabin vibration frequency values are calculated; an identification step, wherein according to calculated vibration frequency, an oscillation-actuating source is judged; a vibration reduction step, according to the oscillation-actuating source, an oscillation-actuating frequency in control signals are filtered out. The vibration monitor and control method and system for the wind turbine generator can thoroughly solve the cabin vibration problem caused by variable pitch adjusting, the transmission chain rotating frequency and the like, and any equipment cost is not required to be added.

Description

technical field [0001] The invention relates to the field of vibration control of wind turbines, in particular to a method and system for monitoring and controlling the vibration of wind turbines. Background technique [0002] With the continuous development of wind turbines in the direction of high power, the height of the tower, the diameter of the wind rotor and the overall weight of the nacelle are all increasing, and the vibration problem is becoming more and more prominent. Excessive vibration amplitude of the unit may not only cause breakdown and loss of power generation, but also affect the life of each component in the unit and the long-term safe and stable operation of the unit. [0003] According to practical experience, there are many main reasons for the vibration of the wind turbine nacelle, such as Figures 1a-1d It is shown that vibration excitation comes from axial or lateral swing caused by unbalanced blades, wind turbulence causes tower to shake back and f...

AI Technical Summary

Problems solved by technology

This protection method is passive protection. When the vibration value exceeds the alarm limit and stops, the vibration of the fan is already very large, which has already caused a certain impact on the unit.

[0005] It can be seen that the above-mentioned existing control methods that can reduce the vibration problem of wind turbines obviously still have inconvenience and defects in terms of method and use, and need to be further improved urgently.

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