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Gas insulation combined electric device local discharge superhigh frequency detection apparatus and method

A technology of gas insulation combination and detection device, which is applied in the direction of measurement device, instrument, measurement electricity, etc., can solve the problems of poor anti-interference ability, single detection method, narrow detection frequency band, etc.

Inactive Publication Date: 2008-01-23
CHONGQING UNIV
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AI Technical Summary

Problems solved by technology

Although the GIS partial discharge detection methods or devices disclosed at home and abroad have brought some positive effects, due to their narrow detection frequency band, low sensitivity, and poor anti-interference ability, when the partial discharge signal is very weak, especially when using The UHF external antenna sensor detects the UHF electromagnetic waves leaked to the outside of the GIS through the gap of the insulator. At this time, the signal has a greater attenuation and is weaker.
The detection method is single and the detection effect is not ideal

Method used

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  • Gas insulation combined electric device local discharge superhigh frequency detection apparatus and method
  • Gas insulation combined electric device local discharge superhigh frequency detection apparatus and method
  • Gas insulation combined electric device local discharge superhigh frequency detection apparatus and method

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Embodiment Construction

[0011] Below in conjunction with accompanying drawing, technical scheme of the present invention is described further:

[0012] A device and method for detecting UHF partial discharge of gas-insulated composite electrical appliances. Its detection principle is as follows: the ultra-high-frequency ultra-wideband vibrator antenna sensor receives the electromagnetic wave signal excited by the partial discharge of gas-insulated composite electrical appliances, and is amplified and filtered by an amplification filter. The high-speed digital collector collects the signal waveform and sends it to the computer for storage and processing to diagnose and identify partial discharge faults. Partial discharge UHF detection device of gas-insulated combined electrical appliances, which consists of gas-insulated combined electrical appliances, leakage electromagnetic waves (4), ultra-high frequency and ultra-wideband vibrator antenna sensors (5), coaxial radio frequency cables (6, 8), amplific...

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Abstract

The UHF detection equipment for local discharge in gas insulated combined electric appliance consists of seven parts of gas insulated combined electric appliance, leaked electromagnetic wave, UHF ultrawideband vibrator antenna sensor, coaxial RF cables, amplifying filter, high speed digital sampler, bus and computer. The present invention has effectively increased UHF detecting bandwidth and raised detecting sensitivity and S / N ratio, so that it can obtain accurate local discharge information. The present invention may be used widely in insulation state monitoring of gas insulated high voltage equipment with SF6 breaker, gas insulated cable, etc.

Description

technical field [0001] The invention relates to the field of ultra-high-frequency detection of partial discharge of a gas-insulated combined electrical appliance (GIS), in particular to an ultra-high-frequency detection device and method for partial discharge of a gas-insulated combined electrical appliance. Background technique [0002] The GIS partial discharge signal detection in the prior art, its sensor technology is a very critical technology. Since the GIS partial discharge signal is a pulse with a time width ranging from about 1 to several ns, the frequency can be as high as 1GHz or more, and the main factor affecting the external noise of the partial discharge detection sensor is the electromagnetic wave emitted by the radio station or wireless communication, and its frequency ranges from Several kHz to dozens of MHz, so when detecting partial discharge signals in a strong noise environment, UHF sensors have a greater advantage. For example, Japanese Patent Publica...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/02G01R31/12
Inventor 唐炬孙才新张晓星魏钢杜林李剑周泉王有元陈伟根
Owner CHONGQING UNIV
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