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GIS partial discharge external sensor

An external sensor and partial discharge technology, applied in the direction of testing the dielectric strength, etc., can solve the problems of high reliability of the sensor, etc., and achieve the effects of easy movement and installation, high detection sensitivity, and small size

Inactive Publication Date: 2012-06-27
STATE GRID SHANDONG ELECTRIC POWER +1
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  • Abstract
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Problems solved by technology

The built-in sensor is installed in the GIS cavity, which can obtain high detection sensitivity, but also has high requirements for the reliability of the sensor

Method used

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  • GIS partial discharge external sensor
  • GIS partial discharge external sensor
  • GIS partial discharge external sensor

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Embodiment Construction

[0032] The GIS partial discharge external sensor of the present invention will be further explained below in conjunction with specific embodiments.

[0033] The structure of the microstrip antenna of the GIS partial discharge external sensor described in the present invention in this embodiment is as follows figure 1 As shown, the lower surface of the metal patch 1 is in close contact with the upper surface of the dielectric substrate 2 , and the lower surface of the dielectric substrate 2 is in close contact with the upper surface of the ground plate 3 . Among them, the dielectric substrate 2 is a polytetrafluoroethylene substrate or a glass fiber laminated substrate with a thickness of 20 mm, a relative permittivity εr of 3.1, a metal patch width W of 60 mm, and a length L of 112.3 mm. The feed point 4 feeds the microstrip antenna. A radio frequency electromagnetic field is formed between the metal patch 1 and the ground plate 3 , and the direction of the radio frequency el...

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Abstract

The invention discloses a GIS partial discharge external sensor which comprises a microstrip antenna. The microstrip antenna comprises: a metal ground plate which has an upper surface and a lower surface; a medium substrate which has an upper surface and a lower surface, wherein the lower surface of the medium substrate is in contact with the upper surface of the ground plate; and a metal paster which has an upper surface and a lower surface, wherein the lower surface of the metal paster is in contact with the upper surface of the medium substrate. A radio frequency electromagnetic field is formed between the metal paster and the ground plate, and a direction of the radio frequency electromagnetic field is perpendicular to a plane which the ground plate locates at and points at the ground plate from the metal paster.

Description

technical field [0001] The invention relates to a signal detection device, in particular to a partial discharge signal detection device. Background technique [0002] Gas Insulated Switchgear (GIS) equipment will generate partial discharge (hereinafter referred to as partial discharge) before insulation breakdown due to insulation defects. Partial discharge is a symptom and manifestation of GIS insulation defects. The detection of GIS partial discharge can detect its internal insulation defects earlier, so that appropriate measures can be taken to prevent its further development from causing accidents. [0003] Partial discharge in GIS is a series of current pulses with a very short rise time, which is accompanied by various physical and chemical phenomena such as sound, light, and chemical products. Studies have shown that as far as a single PD pulse is concerned, its rise time can be as short as less than 1ns, and electromagnetic waves with a frequency of several GHz can...

Claims

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Application Information

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IPC IPC(8): G01R31/12
Inventor 陈静白万建盛戈皞王磊杨卫东张卫国崔荣花胡岳江秀臣
Owner STATE GRID SHANDONG ELECTRIC POWER
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