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A method for controlling vibration of a tower of a wind power generating set

A technology for wind turbines and towers, which is applied in the control of wind turbines, monitoring of wind turbines, wind turbines, etc., can solve the problems of low power generation operation efficiency, low safety, and high phase accuracy requirements of the wind turbines, and avoid real-time performance. The effect of deterioration, reducing the number of shutdowns, and reducing the impact force at the moment of shutdown

Active Publication Date: 2016-08-10
STATE GRID CORP OF CHINA +2
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AI Technical Summary

Problems solved by technology

[0012] The purpose of the present invention is to provide a tower vibration control method for wind power generators to solve the problems of high phase accuracy requirements of existing control methods or low operating efficiency and low safety of generating sets

Method used

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  • A method for controlling vibration of a tower of a wind power generating set
  • A method for controlling vibration of a tower of a wind power generating set
  • A method for controlling vibration of a tower of a wind power generating set

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Embodiment Construction

[0040] The present invention will be further introduced below in conjunction with the accompanying drawings and specific embodiments.

[0041] like figure 1 Shown is the schematic diagram of fan vibration control of the present invention, as can be seen from the figure, the wind power generating set tower vibration control method provided by the present invention includes the following steps:

[0042] (1) Use the wind turbine trial operation data to determine the vibration frequency characteristics of the whole machine to ensure that the frequency characteristics are specific to the specific unit. The vibration frequency characteristics of the whole machine include the vibration characteristic frequency of the tower and the modal frequency The modal frequency and the natural frequency are equivalent: the multi-degree-of-freedom vibration is called the modal frequency; the vibration mode of the object is obtained by decoupling the vibration equation of the object, including the...

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Abstract

The invention discloses a vibration control method for a wind generator set tower. The method comprises the steps of collecting motor rotation speed data in real time and utilizing a cabin vibration sensor to collect vibration signals; converting the collected vibration signals into vibration signal peak-to-peak values, and when the vibration signal peak-to-peak values exceed a set alarm value, triggering vibration alarm and performing real-time frequency spectrum characteristic analysis; obtaining real-time frequency spectrum characteristics and a wind wheel rotating speed value at the time; comparing a complete machine vibration frequency point corresponding to the wind wheel rotating speed value in complete machine vibration frequency characteristics obtained in advance and energy concentration degree under the frequency in a real-time frequency spectrum characteristic spectrum, and analyzing vibration reasons and correspondingly performing vibration reduction processing according to the different reasons. According to the vibration control method, the reasons for causing complete machine vibration are distinguished through a spectral analysis algorithm, so that cabin vibration of a wind generator is controlled to guarantee complete machine safety, times of shutdown caused by vibration is reduced, and the wind generator set utilization rate is improved.

Description

technical field [0001] The invention belongs to the field of wind power generator control, and in particular relates to a method for controlling the vibration of a wind power generator tower. Background technique [0002] For large-scale variable-speed variable-pitch wind turbines, below the rated wind speed, the generator speed can be adjusted with the change of wind speed, and the electromagnetic torque of the generator can be controlled through the converter to maintain the best blade tip speed ratio and track the maximum wind energy; Above the wind speed, adjust the pitch angle through the pitch control system to change the aerodynamic characteristics of the blades, control the wind energy absorbed by the wind turbine, and ensure the output power and speed of the wind turbine are stable, but due to the following reasons, the wind turbine is prone to vibration. [0003] (1) In a constant speed wind turbine, the induction generator slip curve acts like a strong damper, mak...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F03D17/00F03D7/00
CPCY02E10/72
Inventor 陶学军岳红轩卢晓光吴鹏张延辉盛琰桂黄宇刘伟鹏张举良丁艳军陈娜娜
Owner STATE GRID CORP OF CHINA
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