Wind power plant tower vortex-induced vibration early warning method and early warning system

Abstract

The invention discloses a wind power plant tower vortex-induced vibration early warning method and early warning system. The method comprises the steps of collecting a vibration signal of a set and awind speed signal and a wind direction signal of a wind power plant, and calculating a vibration peak value, a vibration effective value, an average wind speed and an average wind direction of the setin a collection time period; and comparing the average wind speed with the theoretical critical resonance wind speed value of the wind generation set, changing a collection frequency, further carrying out trend analysis on the vibration peak value and the vibration effective value of each set, achieving accurate prediction of vortex-induced vibration of a tower, and sending out early warning andalarm signals in time. The early warning system comprises a vibration sensor, a wind direction sensor, a wind speed sensor and a server connected with the vibration sensor, the wind direction sensor and the wind speed sensor, the vibration sensor is arranged in a cabin or the tower, and the wind direction sensor and the wind speed sensor are arranged on a meteorological frame. The risk caused by tower vortex-induced resonance when the set cannot be powered on for operation can be avoided, the set yaws by means of temporary power supply in time through early warning of tower vortex-induced vibration, and the safety of the tower is guaranteed.

Description

technical field [0001] The invention relates to the technical field of wind power, in particular to an early warning method and an early warning system for vortex-induced vibration of a wind farm tower. Background technique [0002] In order to capture more wind energy, the diameter of the wind rotor of the wind turbine is getting larger and larger, and in order to increase the operating wind speed of the wind turbine, the height of the tower of the wind turbine is also getting higher and higher. These two development trends will inevitably lead to the gradual reduction of the natural frequency of the complete wind turbine. [0003] The reduction of the natural frequency will lead to the gradual decrease of the wind speed at which the vortex-induced resonance of the wind turbine occurs, which will directly increase the probability of the vortex-induced resonance of the wind turbine in its life cycle, and once the wind turbine is in the vortex-induced resonance for a long tim...

AI Technical Summary

Problems solved by technology

[0003] The reduction of the natural frequency will lead to the gradual decrease of the wind speed at which the vortex-induced resonance of the wind turbine occurs, which will directly increase the probability of the vortex-induced resonance of the wind turbine in its life cycle, and once the wind turbine is in the vortex-induced resonance for a long time, it will have a negative impact on the wind turbine. The safety of the tower of the wind turbine has a great impact

Generally, vortex-induced resonance of wind turbines mostly occurs during the hoisting and commissioning stage of the unit and the power outage maintenance stage of the wind farm, because the unit cannot automatically yaw at this time. Vortex-induced vibration poses a threat to the tower of the wind turbine. When the unit is in the state of vortex-induced resonance for a long time, the tower is prone to collapse risk

[0004] The present invention aims at the problem that the existing wind turbines cannot automatically yaw during the unit hoisting and debugging stage and the wind farm power outage maintenance stage, and creates a new wind farm tower vortex-induced vibration early warning method and early warning system, so that it can During the hoisting and commissioning stage and the wind farm power outage maintenance stage, it is possible to predict in advance whether the unit will experience vortex-induced resonance, and then use temporary power supply to make the unit complete the yaw, thereby avoiding the long-term vortex-induced resonance of the unit and ensuring the safety of the tower

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