Intelligent ultrahigh frequency sensor for electrical equipment partial discharge detection

A partial discharge detection, UHF sensor technology, applied in the direction of instruments, measuring electricity, measuring devices, etc., can solve the problems of narrow detection frequency band and large size of UHF antennas, reduce the cost of data acquisition, high detection sensitivity, The effect of small directional differences

Inactive Publication Date: 2016-05-25
ELECTRIC POWER RES INST STATE GRID JIANGXI ELECTRIC POWER CO +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention, in order to overcome the shortcomings of existing UHF antennas such as narrow detection frequency band and large volume, the present invention provides an intelligent UHF sensor for partial discharge detection of electrical equipment; the sensor also has data processing and transmission functions Function

Method used

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  • Intelligent ultrahigh frequency sensor for electrical equipment partial discharge detection
  • Intelligent ultrahigh frequency sensor for electrical equipment partial discharge detection
  • Intelligent ultrahigh frequency sensor for electrical equipment partial discharge detection

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Embodiment Construction

[0029] Below in conjunction with specific embodiment, further illustrate the present invention.

[0030] In this embodiment, the intelligent UHF sensor is provided with a signal conditioning module 2 connected to the closed Hilbert fractal antenna 1 signal output, a wireless communication module 3 and a power supply module 4, such as figure 1 shown.

[0031] The signal conditioning module 2 includes an amplification and filtering unit 5 , a peak hold unit 6 and a data acquisition unit 7 . The amplification and filtering unit is used to filter out interference and amplify the signal, and is composed of a band-pass filter and a low-noise amplifier. Since the mobile phone interference frequency is within the UHF detection frequency band, it needs to be filtered out by a notch filter. Therefore, the band-pass filter is formed by cascading low-pass, high-pass filters and notch filters, and the prototype of the elliptic function filter can be selected. The low noise amplifier con...

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Abstract

The invention relates to an intelligent ultrahigh frequency sensor for electrical equipment partial discharge detection. The sensor comprises an enclosed Hilbert fractal antenna, a signal conditioning module, a wireless communication module and a power supply module, wherein the enclosed Hilbert fractal antenna comprises a lead paster, a medium substrate, a grounding layer and a feeding probe, the lead paster is designed on the basis of an improved three-order Hilbert fractal curve and comprises an enclosed radiation arm of which two ends are mutually connected, the signal conditioning module comprises an amplification filtering unit, a peak value holding module and a data acquisition module, and the wireless communication module employs a WIFI wireless emission module. The sensor is suitable for internal partial discharge detection of electrical equipment such as a high voltage switch cabinet, a transformer, an electrical cable and GIS equipment.

Description

technical field [0001] The invention relates to an intelligent ultra-high frequency sensor for partial discharge detection of electrical equipment, belonging to the technical field of on-line insulation detection of electrical equipment. Background technique [0002] High-voltage electrical equipment often manifests as the gradual development and enhancement of partial discharge (referred to as partial discharge) before insulation breakdown occurs, and insulation failures often originate from insulation degradation caused by partial discharge. Partial discharge is an important symptom of insulation deterioration. The higher the degree of insulation deterioration, the stronger the partial discharge activity. At the same time, partial discharge is also an important cause of further insulation deterioration. [0003] When the partial discharge occurs in a small range inside the electrical equipment, the breakdown process is very fast, and a steep pulse current will be generated...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/12
CPCG01R31/1227
Inventor 王鹏刘明军李唐兵刘玉婷
Owner ELECTRIC POWER RES INST STATE GRID JIANGXI ELECTRIC POWER CO
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