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Vibration acceleration measurement-based wind power generation unit transmission system fault alarm method

A technology for wind turbines and vibration acceleration, applied in wind turbines, monitoring of wind turbines, engines, etc., can solve problems such as insensitivity of alarms, achieve obvious alarm effects, and improve sensitivity and accuracy

Active Publication Date: 2017-09-29
青岛绿色发展研究院有限公司
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Problems solved by technology

However, after analyzing the measured vibration acceleration data of multiple sets of wind turbines, it was found that the effective value of vibration acceleration of some units that have been confirmed to be faulty did not exceed the alarm threshold specified in the standard, that is, the alarm method based on the effective value of vibration acceleration exists. The problem of insensitive alarm

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  • Vibration acceleration measurement-based wind power generation unit transmission system fault alarm method
  • Vibration acceleration measurement-based wind power generation unit transmission system fault alarm method
  • Vibration acceleration measurement-based wind power generation unit transmission system fault alarm method

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Embodiment Construction

[0040] The invention provides a method for fault alarm of a transmission system of a wind power generating set, which comprises the following steps:

[0041] Step 1: Sampling the vibration acceleration signals of the important parts of the transmission system of the wind turbine at equal time intervals continuously, and setting the number of sampling points as N points;

[0042] Step 2: The vibration acceleration signal obtained by sampling is processed according to formula (1);

[0043]

[0044] Where: y i is the vibration acceleration signal value after direct current removal;

[0045] x i Obtain the vibration acceleration signal value for sampling;

[0046] i is the signal sampling number, i=1,2,3,...,N;

[0047] is the mean value of the signal;

[0048]

[0049] Step 3: Calculate the variance σ of the vibration acceleration signal after DC removal 2 ;

[0050] According to the definition of variance:

[0051]

[0052] because, y i is the vibration accel...

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Abstract

The invention relates to a vibration acceleration measurement-based wind power generation unit transmission system fault alarm method which comprises the following steps of collecting a vibration acceleration signal at an important part of a wind power generation unit transmission system firstly, then constructing an acceleration signal-based compound index M, wherein the compound index M in the method is obtained by synthesizing an effective value of the vibration acceleration signal and a kurtosis index, comparing the obtained compound index M with a preset alarm threshold MThreshold, and finally, judging a running condition and a fault level of the wind power generation unit transmission system through a comparative result. Shown by analyzing actually-measured vibration acceleration data of multiple groups of the wind power generation units, the method provided by the invention has remarkable promotion action on the sensitivity and the accuracy of a fault alarm of the wind power generation unit.

Description

technical field [0001] The invention belongs to the field of state monitoring of wind power generating sets, and relates to a method for state monitoring and fault alarm of a wind power generating set transmission system. Background technique [0002] Wind energy is a typical representative of renewable energy. Due to its clean and efficient characteristics that meet the requirements of sustainable development, the installed capacity of wind power in the world is currently increasing. With the planning and construction of large-scale wind farms, the proportion of wind power in the power system is gradually increasing. How to improve the operating efficiency and income of wind power has become the key to the development of wind power. [0003] Due to the harsh operating environment of wind turbines and complex operating conditions and working conditions, the failure rate of the gearbox and shafting of the transmission system is often high, and the high failure rate causes hig...

Claims

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Application Information

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IPC IPC(8): F03D17/00
CPCF03D17/00
Inventor 胡爱军孙尚飞赵军向玲
Owner 青岛绿色发展研究院有限公司
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