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Abnormal vibration analysis-based GIS (gas insulated switchgear) mechanical fault diagnosis method and system

A technology for mechanical faults and diagnosis methods, applied in the testing, measuring devices, instruments, etc. of machine/structural components, can solve the problems of immaturity, rare application of online monitoring and diagnosis systems, etc., and achieve the effect of strong anti-interference ability and sensitivity

Active Publication Date: 2016-09-28
STATE GRID CORP OF CHINA +1
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Problems solved by technology

[0008] For the fault monitoring technology of GIS, the offline regular maintenance method or partial live detection offline maintenance method is still mainly used at home and abroad at present. The application of a relatively complete online monitoring and diagnosis system in actual production is still very rare and immature.

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  • Abnormal vibration analysis-based GIS (gas insulated switchgear) mechanical fault diagnosis method and system

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Embodiment Construction

[0028] It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and examples.

[0029] Aiming at the current research status and existing problems of GIS mechanical state online monitoring and fault diagnosis technology, the present invention provides a GIS mechanical state online monitoring and fault diagnosis method, and proposes a set of intelligent GIS mechanical state for practical engineering applications Online monitoring and fault diagnosis system.

[0030] According to the GIS mechanical fault diagnosis system of the present invention, such as figure 1 As shown, it includes a vibration signal detection module 11, a signal conditioning module 12, a data acquisition module 13, and a signal processing module 14. The signal processing module 14 uses a threshold value...

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Abstract

The invention discloses an abnormal vibration analysis-based GIS (gas insulated switchgear) mechanical fault diagnosis method and system. The GIS (gas insulated switchgear) mechanical fault diagnosis method includes the following steps that: vibration signals on a GIS are acquired; de-noising processing is performed on the acquired signals through using a threshold de-noising method; various kinds of feature information contained in the signals are extracted by using a narrowband noise aided multivariate empirical mode decomposition (EMD) method; the power feature of the signals is extracted by using a power density function, and the maximal amplitudes of the power spectra of all IMF of each channel are calculated so as to form power feature matrixes under measured conditions; and a power feature matrix under a normal condition and / or power feature matrixes under various kinds of fault conditions which are obtained through tests are adopted as judgment criteria of faults. Compared with a traditional method, the method and system of the invention have no influence on the normal operation of a whole power system, and can monitor the running state of the GIS safely and reliably, and are suitable for being applied to GIS substations of various voltage levels.

Description

technical field [0001] The invention relates to a GIS mechanical fault diagnosis method and system based on abnormal vibration analysis. Background technique [0002] At present, the abnormal mechanical vibration of GIS (Gas Insulated Switchgear, gas insulated switchgear) occurs when the substation is in operation. The abnormal vibration will have a negative impact on the operation status of GIS, and may cause excessive noise, which will affect the work of operators and personnel near the substation. Life. At the same time, the abnormal vibration will interfere with the partial discharge ultrasonic detection of the on-site GIS, which affects the accurate evaluation of the GIS operation status. [0003] GIS condition monitoring creates conditions for realizing the transition from planned maintenance to condition-based maintenance. The long-term planned maintenance and blind dismantling and disassembly have wasted a lot of manpower, material and financial resources, and also...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M99/00G01H11/08
CPCG01H11/08G01M99/00
Inventor 孙庆生曹涛周章斌韩光王勤王东
Owner STATE GRID CORP OF CHINA
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