GIS equipment defect diagnosis device and method based on FFT, VMD and LS-SVM
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A LS-SVM, defect diagnosis technology, applied in the direction of measuring devices, instruments, measuring electricity, etc., can solve the problems of low measurement accuracy, simple vibration detection structure, and no detection device proposed
Active Publication Date: 2021-05-18
STATE GRID CHONGQING ELECTRIC POWER CO ELECTRIC POWER RES INST +1
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Problems solved by technology
At present, there is a certain research foundation for the detection of GIS abnormal noise and vibration defects at home and abroad, but a systematic and effective detection device has not been proposed, and there are still shortcomings such as simple structure of vibration detection, low measurement accuracy, and inability to realize self-diagnosis.
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Embodiment 1
[0060] In the embodiment of the present invention, such as Figure 1~2 As shown, the GIS equipment defect diagnosis device based on FFT, VMD and LS-SVM includes:
[0061] Vibration collection module, used to collect the vibration signal on the shell of GIS equipment;
[0062] Fingerprint library, based on the GIS equipment real-type platform to simulate typical abnormal noise and vibration defects to obtain the fingerprint library;
[0063] Feature extraction module adopts FFT algorithm and VMD algorithm to extract the waveform feature of the vibration signal;
[0064] The fault diagnosis module adopts the LS-SVM algorithm to diagnose the waveform characteristics;
[0065] The PC upper computer uses the LabVIEW programming interface to realize human-computer interaction, and the vibration acquisition module, feature extraction module, and fault diagnosis module all realize human-computer interaction through the LabVIEW programming interface of the PC upper computer.
[0066] ...
Embodiment 2
[0075] In the embodiment of the present invention, such as Figure 3-17 As shown, the GIS equipment defect diagnosis method includes the following steps:
[0076] 1. Fix the vibration sensor of the vibration acquisition module on the shell of the GIS equipment to be detected, and the vibration acquisition module acquires the vibration signal on the shell of the GIS equipment;
[0077] 2. The vibration signal is transmitted to the PC host computer, and the vibration signal obtained is analyzed through the human-computer interaction interface of the PC host computer;
[0078] 3. Obtain the fault type through the feature extraction module and fault diagnosis module;
[0079] 3.1 feature extraction module adopts FFT algorithm and VMD algorithm to extract the waveform feature of described vibration signal, comprises the following steps:
[0080] The vibration signal under the normal operation of GIS equipment is mainly the fundamental frequency vibration signal of 100Hz, and the ...
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Abstract
The invention is suitable for the technical field of GIS mechanical defect diagnosis, and provides a GIS equipment defect diagnosis device and method based on FFT, VMD and LS-SVM, and the GIS equipment defect diagnosis device comprises a vibration collection module which is used for collecting a vibration signal on a GIS equipment housing; a fingerprint database obtained by simulating typical abnormal sound vibration defects on the basis of a GIS equipment real-model platform; a feature extraction module used for extracting waveform features of the vibration signals by adopting an FFT algorithm and a VMD algorithm; a fault diagnosis module used for diagnosing the waveform characteristics by adopting an LS-SVM algorithm; and a PC upper computer which adopts a LabVIEW programming interface to realize man-machine interaction. The device has the advantages of integration, portability, high detection precision and the like, the abnormal sound vibration defects of the GIS equipment in operation can be self-diagnosed, potential mechanical defects of the GIS equipment can be found in time, and the system and the method have important significance on the maintenance of safe operation of the GIS equipment.
Description
technical field [0001] The invention belongs to the technical field of GIS mechanical defect diagnosis, and in particular relates to a GIS device defect diagnosis device and method based on FFT, VMD and LS-SVM. Background technique [0002] Gas-insulated fully enclosed combined electrical equipment (hereinafter referred to as GIS) is a widely used electrical equipment in today's transmission network. The circuit breaker, isolating switch, grounding switch, voltage and current transformer, lightning arrester, connecting busbar, cable terminal, inlet and outlet bushing and other primary equipment in the substation are optimized and orderly combined into a whole, and packaged in a metal shell Up, the inside of the equipment is filled with SF6 gas as a closed combination of arc extinguishing and insulating medium. [0003] Mechanical vibration is common in GIS equipment in operation. GIS equipment always has one or more inherent vibration frequencies. When the equipment has me...
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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/12
CPCG01R31/1254G01R31/1209Y04S10/52
Inventor 蒋西平李永福王谦龙英凯李思全杨勃吴照国张施令
Owner STATE GRID CHONGQING ELECTRIC POWER CO ELECTRIC POWER RES INST
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