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GIS mechanical defect diagnosis system and method based on abnormal vibration analysis

A technology for mechanical defect and vibration analysis, applied in the measurement of vibration, vibration measurement in solids, instruments, etc., it can solve problems such as the influence of the accuracy of the detection results and the inability of ultra-high frequency sensors to suppress interference, and achieve the effect of ensuring reliable operation.

Active Publication Date: 2019-04-16
HEFEI POWER SUPPLY COMPANY OF STATE GRID ANHUI ELECTRIC POWER +1
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AI Technical Summary

Problems solved by technology

[0010] Fault diagnosis can be carried out according to the waveform characteristics of the discharge pulse and the frequency characteristics of the UHF signal, which has good detection sensitivity, but the structural design of the UHF sensor itself cannot suppress the interference from the high-frequency band in the substation, which makes the accuracy of the detection results severely affected

Method used

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  • GIS mechanical defect diagnosis system and method based on abnormal vibration analysis
  • GIS mechanical defect diagnosis system and method based on abnormal vibration analysis
  • GIS mechanical defect diagnosis system and method based on abnormal vibration analysis

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Embodiment Construction

[0047] The present invention is described in detail below in conjunction with accompanying drawing:

[0048] Such as figure 1 As shown, the vibration signal of the GIS shell is mainly transmitted by the vibration of its internal power transmission equipment. These power transmission equipment include circuit breakers, disconnectors, transformers, and busbars. Therefore, the vibration signals on the shell have the vibration signals of these equipment. vibration characteristics. figure 1 Among them, 1. indicates vibration caused by partial discharge, 2. indicates vibration caused by foreign objects, 3. indicates vibration caused by electromagnetic force and magnetostriction, 4. indicates vibration caused by electrostatic force, 5. indicates vibration caused by operation, and 6. indicates vibration Vibration caused by a short circuit to ground.

[0049] Vibration caused by partial discharges.

[0050] Since the foreign matter is too small compared to the shell, the effect of f...

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Abstract

The invention discloses a system and a method of diagnosing GIS (Gas Insulated Switchgear) mechanical defects based on abnormal vibration analysis. An acceleration sensor is fixed at the position of a measurement point on the surface of the GIS shell, and the acceleration sensor, a charge amplifier, a data acquisition unit and a data processing device are serially connected in sequence; after the data processing device carries out wavelet denoising on measured vibration signals, a spectrum for vibration signals at each measurement point is obtained finally; and through analyzing the signal component of each frequency range of the spectrum, the GIS mechanical fault type is determined. The system and the method of the invention have the beneficial effects that the GIS diagnosis technology research based on abnormal vibration analysis provides an important and feasible detection means for discovering GIS mechanical defects or hidden fault, and an important role is played in ensuring reliable operation of the GIS.

Description

technical field [0001] The invention relates to the technical field of mechanical fault diagnosis, in particular to a GIS mechanical defect diagnosis system and method based on abnormal vibration analysis. Background technique [0002] Gas Insulated Switchgear (GIS) is widely used in substations of various voltage levels, and has many advantages, such as small footprint, long maintenance cycle, all components are sealed from environmental interference, and high operational reliability. Technologically advanced and economically superior. Although GIS has many advantages, there are also some problems. For example, because all components of GIS are packaged in metal boxes, the structure is compact, and there are many internal electrical components, it is difficult to find and accurately locate the fault in time; Its complex structure is not easy to disassemble, and it is difficult to realize on-site maintenance. In case of failure, GIS generally has a power outage of 2 weeks,...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/00G01H1/00
CPCG01H1/00G01R31/00
Inventor 孙庆生曹涛
Owner HEFEI POWER SUPPLY COMPANY OF STATE GRID ANHUI ELECTRIC POWER
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