Method for dynamically monitoring health status of wind turbine gearbox in real time

A technology of health status and wind turbines, applied in the field of rotating machinery status monitoring and fault diagnosis, can solve problems that affect the accuracy of gearbox health status assessment, do not consider the impact of thresholds, and are difficult to accurately evaluate gearboxes, etc.

Inactive Publication Date: 2012-11-07
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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Problems solved by technology

However, due to the lack of effective feature extraction and multivariate state information fusion, it is difficult to achieve an accurate assessment of the overall health state of the gearbox; in addition, the vibration and tempe

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  • Method for dynamically monitoring health status of wind turbine gearbox in real time
  • Method for dynamically monitoring health status of wind turbine gearbox in real time
  • Method for dynamically monitoring health status of wind turbine gearbox in real time

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[0047] The preferred embodiments will be described in detail below in conjunction with the drawings. It should be emphasized that the following description is only exemplary, and is not intended to limit the scope of the present invention and its application.

[0048] The steps of the present invention are as follows:

[0049] Step 1: Collect gearbox vibration signals and gearbox operation and monitoring data;

[0050] Step 2: Analyze the gearbox vibration signal to obtain the time domain characteristics, frequency domain characteristics and envelope spectrum characteristics of the envelope signal of the gearbox vibration signal;

[0051] Step 3: Establish the gearbox operating condition space, divide the gearbox operating condition space into set gearbox operating condition subspaces according to the gearbox operating and monitoring data;

[0052] Step 4: On the basis of steps 2 and 3, divide the gearbox time domain characteristics, frequency domain characteristics, operation and moni...

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Abstract

The invention discloses a method for dynamically monitoring the health status of a wind turbine gearbox in real time in the technical field of status monitoring and fault diagnosis of rotating machinery. The method comprises the following steps: acquiring a vibration signal and operating and monitoring data of the gearbox; analyzing the vibration signal of the gearbox to obtain the time domain feature and frequency domain feature of the vibration signal of the gearbox and the envelope spectrum feature of an envelope signal; establishing an operation condition space for the gearbox and dividing the operation condition space of the gearbox into a predetermined number of operation condition sub-spaces of the gearbox according to the operating data of the gearbox; generating a health status feature library for each component of the gearbox from an obtained operation monitoring historical data subset; establishing a health status evaluation model to obtain a health status real-time evaluation model under each operation condition and the health index of each component; and finally, calculating the health index of the gearbox. With the method, the health status evaluation model is established, the complexity of determining a monitoring threshold under a complex dynamic operation condition is avoided, and the defect of linear distortion caused by the simple increment of multi-feature parameters is overcome.

Description

technical field [0001] The invention belongs to the technical field of state monitoring and fault diagnosis of rotating machinery, and in particular relates to a method for real-time dynamic monitoring of the health state of a wind turbine gearbox. Background technique [0002] The gearbox is a key component of the wind turbine, responsible for power transmission and speed change. Due to the complex and harsh operating environment (alternating load, humidity, wind and sand, vibration, high temperature, corrosion, etc.), the gearbox failure rate of wind turbines is extremely high. According to statistics, after five years of operation, the damage rate of wind farm gearboxes is as high as 40% to 50%, and the replacement rate of very few gearboxes is almost close to 100%. In recent years, the failure rate of gearboxes has been increasing year by year, which has become the main reason for the low availability of wind farm units and high operation and maintenance costs. [0003...

Claims

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Application Information

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IPC IPC(8): G01M13/02
Inventor 董玉亮房方
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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