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Wind driven generator variable-pitch transmission belt fault diagnosis method based on current signals

A wind turbine and current signal technology, which is applied in the direction of motor generator testing, measuring electrical variables, measuring electricity, etc., can solve the problems of increasing operation and maintenance costs of wind farms, difficult and different fault diagnosis methods, and achieve intelligent perception and The effect of intelligent operation and maintenance, avoiding the risk of failure, and reducing the incidence of failure

Active Publication Date: 2020-04-10
TSINGHUA UNIV
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Problems solved by technology

The vibration signal needs to be installed with an additional vibration signal sensor, and the connection line needs to be connected to the acquisition system. It is not suitable for the hub nacelle of the wind turbine that rotates all the time, so it cannot be used in the pitch system of the wind turbine.
[0007] The existing technical solutions have the following technical defects: there is no fault diagnosis method for the wind turbine pitch drive belt; the existing fault diagnosis method for the drive belt mainly relies on additional position signal sensors, which increases the cost of wind farm operation and maintenance ; Based on the data-driven fault diagnosis method, it is difficult to make a reasonable explanation in principle, and different results may be obtained by replacing different data sets

Method used

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  • Wind driven generator variable-pitch transmission belt fault diagnosis method based on current signals
  • Wind driven generator variable-pitch transmission belt fault diagnosis method based on current signals
  • Wind driven generator variable-pitch transmission belt fault diagnosis method based on current signals

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Embodiment Construction

[0049] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in combination with specific embodiments and with reference to the accompanying drawings. It should be understood that these descriptions are exemplary only, and are not intended to limit the scope of the present invention. Also, in the following description, descriptions of well-known structures and techniques are omitted to avoid unnecessarily obscuring the concept of the present invention.

[0050] 1. Analysis of the characteristics of wind turbine pitch drive belt

[0051] Such as image 3 The physical picture of the wind turbine pitch drive belt is shown. Firstly, the periodic slip transition condition that can be used for fault diagnosis of the wind turbine pitch drive belt is proposed. In a belt drive, the friction acts as a force transfer function between the two rolling wheels, so that the driving whe...

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Abstract

The invention relates to a wind driven generator variable-pitch transmission belt fault diagnosis method based on current signals. The method comprises the following steps: acquiring variable-pitch belt transmission system driving shaft motor stator current signals; preprocessing the motor stator current signals to enable the motor stator current signals to meet the requirements of a monitoring system; acquiring a spectrogram of the preprocessed motor stator current signals by using a data analysis method; and determining that the belt of the variable-pitch belt transmission system has a faultif a fault side frequency peak occurs in the fundamental frequency setting range in the frequency spectrum,. By using the method provided by the invention, the slipping fault caused by belt aging canbe identified under the condition of not increasing a sensor.

Description

technical field [0001] The invention relates to the technical field of fault diagnosis, in particular to a fault diagnosis method for a pitch transmission belt of a wind power generator based on a current signal. Background technique [0002] In recent years, the issue of global warming has been paid more and more attention. Clean energy is the core issue for coping with global climate change and realizing sustainable energy supply. Wind power is an important clean energy. Wind power generators have achieved rapid development for decades, especially in recent years when the focus of wind power construction has shifted from land to sea. The grid-connected scale of wind power has become larger and larger, and the single-unit capacity and blade size of wind turbines have also increased day by day. After decades of rapid development of wind turbines, the life cycle of wind turbines is generally 20 to 30 years. Some units in existing wind farms have entered the middle and late ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R23/16G01R31/34G01M13/023G01M13/028
CPCG01M13/023G01M13/028G01R23/16G01R31/343
Inventor 张品佳卢德龙梁哲铭
Owner TSINGHUA UNIV
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