Early warning method and system for abnormal vibration of wind driven generator

A wind turbine and early warning system technology, applied in the field of wind power, can solve problems such as damage to key components, small vibration amplitude, and difficulty in detection, so as to reduce the risk of complete damage, reduce the time of sick operation, Effect of reducing spare parts consumption cost

Active Publication Date: 2014-12-10
BEIJING TIANYUAN SCI & TECH CREATION WINDPOWER TECH
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AI Technical Summary

Problems solved by technology

[0003] At present, the vibration protection of the unit is mainly aimed at the protection of large energy and large amplitude. In actual operation, the damage or abnormality of the key mechanical equipment (generator, blade, etc.) of the unit will cause the unit to operate in a "sick" manner, which will induce changes in the vibration of the unit. Moreover, in the early stage of damage, the amplitude of this vibration change is often small, and it is difficult to detect
It will eventually lead to irreversible damage to key components, causing the unit to shut down for a long time, resulting in large economic losses

Method used

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  • Early warning method and system for abnormal vibration of wind driven generator
  • Early warning method and system for abnormal vibration of wind driven generator
  • Early warning method and system for abnormal vibration of wind driven generator

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Embodiment Construction

[0022] see figure 1 As mentioned above, the early warning method for abnormal vibration of wind power generating set in the present invention mainly includes steps such as data collection, data preprocessing, vibration feature extraction, and vibration state evaluation.

[0023] 1. Data collection

[0024] Collect and process the real-time transient vibration data of the unit. The vibration data includes the acceleration A of the nacelle along the axial direction of the main shaft of the generator X , The acceleration A of the nacelle along the radial direction of the main shaft of the generator Y and the effective value of acceleration of the entire crew cabin A E , and satisfy

[0025] 2. Data preprocessing

[0026] 1) Firstly, data cleaning is performed to eliminate noise data, which includes erroneous data, incomplete or inconsistent data, etc. in the data sequence;

[0027] 2) Secondly, Cartesian gridding is performed on the coordinate system according to a certai...

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Abstract

The invention discloses an early warning method and system for abnormal vibration of a wind driven generator. The early warning method comprises the following steps of: A, data acquisition of acquiring real-time transient vibration data of a machine set; B, data pre-treatment of performing pre-treatment on the acquired data to obtain a calculation sample; C, vibration characteristic extraction of performing ellipse fitting on the calculation sample and extracting a characteristic value of a fitted ellipse; D, vibration state assessment of assessing the vibration state of the machine set based on comparing the characteristic value with the set warning threshold value. The early warning method and system for abnormal vibration of the wind driven generator are used for analyzing the vibration state of the machine set, detecting the vibration characteristics and establishing an early warning mechanism, are good for finding hazard of the machine set as early as possible, reduce the running time of the machine set in fault, accordingly provide judgment basis for repair or replacement of key parts, decrease part damage risk and reduces machine set downtime and spare part consumption cost.

Description

technical field [0001] The invention relates to the technical field of wind power, in particular to an early warning method and system for abnormal vibration of a wind power generating set. Background technique [0002] The main components of high-power permanent magnet direct drive wind turbines include permanent magnet direct drive generators, blades, towers, hubs, and converters. The main mechanical components of the unit have their own vibration modes. Due to the change of the service life of the unit and the difference in operating power, the unit has different vibration characteristics. Vibration is an important manifestation of the operating characteristics of the unit. [0003] At present, the vibration protection of the unit is mainly aimed at the protection of large energy and large amplitude. In actual operation, the damage or abnormality of the key mechanical equipment (generator, blade, etc.) of the unit will cause the unit to operate in a "sick" manner, which ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M7/02G01M15/12
Inventor 随德光王贞叶月光
Owner BEIJING TIANYUAN SCI & TECH CREATION WINDPOWER TECH
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