Fault diagnosis method and device for wind generating set

A technology for wind turbines and fault diagnosis, which is used in motor generator testing, measuring devices, measuring electricity, etc., can solve problems such as low fault diagnosis accuracy, complex system installation, and unstable speed signal acquisition, and achieve improved accuracy and clarity. efficiency, reduce system costs, and achieve engineering and practice optimization effects

Pending Publication Date: 2022-01-28
SHANGHAI ELECTRIC WIND POWER GRP CO LTD
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Problems solved by technology

Generally speaking, the rotational speed is mainly obtained through the rotational speed sensor, and the vibration data and the rotational speed are collected synchronously. From the past research results, the existence of the rotational speed

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  • Fault diagnosis method and device for wind generating set
  • Fault diagnosis method and device for wind generating set
  • Fault diagnosis method and device for wind generating set

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[0044] Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numerals in different drawings refer to the same or similar elements unless otherwise indicated. The implementations described in the following exemplary embodiments do not represent all implementations consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with aspects of the present application as recited in the appended claims.

[0045] The terminology used in this application is for the purpose of describing particular embodiments only, and is not intended to limit the application. As used in this application and the appended claims, the singular forms "a", "the", and "the" are intended to include the plural forms as well, unless the context clearly dictates otherwise. It should also be understood that the term...

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Abstract

The invention provides a fault diagnosis method and device for a wind generating set. The method comprises the following steps of: acquiring a current signal and vibration data of a wind generating set; determining the angular displacement of a generator of the wind generating set according to the current signal; determining a first-order spectrum of the wind generating set according to the angular displacement and the vibration data, a first coordinate axis of the first-order spectrum being used for representing the angular displacement, a second coordinate axis of the first-order spectrum being used for representing the vibration data, and the angular displacement comprising a plurality of unit angular displacements; carrying out interpolation processing on the first-order spectrum to enable the number of the vibration data corresponding to each unit angular displacement to meet a preset condition, so as to obtain a second-order spectrum; and analyzing the second-order spectrum by adopting a fault diagnosis algorithm. The non-rotating-speed order tracking mode is more accurate and stable, the system cost is reduced, and the precision and definition of fault diagnosis are improved through interpolation processing.

Description

technical field [0001] The present application relates to the field of fault diagnosis, in particular to a fault diagnosis method and device for a wind power generating set. Background technique [0002] At present, it is possible to predict the failure of the wind generator set according to the collected speed of the wind generator set, so as to avoid the loss caused by the downtime of the wind generator set. For wind turbines, the bearing vibration and generator fault diagnosis technology at constant speed is relatively mature, and basic FFT analysis, envelope analysis, wavelet analysis, spectrum analysis, etc. can meet the basic analysis requirements. However, in actual situations, the generator is often in a state of variable speed. Generally speaking, the rotation speed is mainly obtained through the rotation speed sensor, and the vibration data and the rotation speed are collected synchronously. From the past research results, the existence of the rotation speed senso...

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Application Information

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IPC IPC(8): G01R31/34G01H17/00G06F17/14
CPCG01R31/343G01H17/00G06F17/14G06F17/148
Inventor 郭和平成骁彬
Owner SHANGHAI ELECTRIC WIND POWER GRP CO LTD
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