External sensor for GIS partial discharge detection

An external sensor, partial discharge detection technology, applied in the direction of measuring device shell, testing dielectric strength, radiation element structure, etc., can solve the problems of electromagnetic wave correspondence, inconvenience to carry, low detection sensitivity, etc.

Inactive Publication Date: 2016-06-15
ELECTRIC POWER RES INST OF STATE GRID ZHEJIANG ELECTRIC POWER COMAPNY +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the receiving frequency band of the rectangular patch antenna is generally narrow, and the detection sensitivity is low; the horn antenna is too large and not easy to carry; although the structure of the dipole antenna is simple, it needs to choose a reasonable location during installation, requiring the site ...

Method used

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  • External sensor for GIS partial discharge detection
  • External sensor for GIS partial discharge detection
  • External sensor for GIS partial discharge detection

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Embodiment Construction

[0031] The core of the invention is to provide an external sensor for GIS partial discharge detection, which has high detection sensitivity, is easy to carry, and is suitable for field application.

[0032] In order to make the above objects, features and advantages of the present invention more comprehensible, the specific implementation manners of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0033] In the following description, specific details are set forth in order to provide a thorough understanding of the present invention. However, the present invention can be implemented in many other ways than those described here, and those skilled in the art can make similar extensions without departing from the connotation of the present invention. Accordingly, the present invention is not limited to the specific embodiments disclosed below.

[0034] Please refer to figure 1 and figure 2 , figure 1 A top view of an ex...

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Abstract

The invention discloses an external sensor for GIS (Gas Insulated Switchgear) partial discharge detection. The external sensor comprises an airfoil patch antenna used for receiving an electromagnetic wave signal generated by GIS partial discharge; the outside of the airfoil patch antenna is coated with a sensor shell used for being fixed on a GIS basin type insulator; the sensor shell is also used for encapsulating the airfoil patch antenna and shielding an external disturbance signal; a feed N-type coaxial connector for being connected with an external feed coaxial cable is arranged on the sensor shell; a first coaxial cable for connecting the airfoil patch antenna and the feed N-type coaxial connector is also arranged in the sensor shell. When the sensor is designed, the return loss and the frequency bandwidth of the sensor can be regulated and defined according to the shape, the size and other parameters of the airfoil patch antenna, so as to realize the correspondence between the frequency band of the antenna and a main frequency band of an electromagnetic wave signal leaked from the basin type insulator, therefore, the sensor is ensured to have wider detection bandwidth and higher sensitivity.

Description

technical field [0001] The invention relates to the technical field of electric equipment insulation state diagnosis, in particular to an external sensor used for GIS partial discharge detection. Background technique [0002] Gas Insulated Switchgear (GIS) has the advantages of small footprint and high operational reliability, and has gradually been widely used in substations. During the assembly and operation of GIS, there may be defects that affect the insulation performance, such as scratches on the center guide rod, and metal particles generated during the breaking process of the circuit breaker. GIS using high pressure SF 6 The gas is insulated, and the internal electric field is a slightly uneven field, and internal defects will cause local electric field enhancement, causing partial discharge or even insulation breakdown. [0003] Among them, the partial discharge is manifested as a current pulse with a very steep rising edge and a very narrow pulse width, which wil...

Claims

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Application Information

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IPC IPC(8): G01R31/12G01R1/04H01Q1/38
CPCG01R31/12G01R1/04H01Q1/38
Inventor 邵先军何文林周华张弛徐华
Owner ELECTRIC POWER RES INST OF STATE GRID ZHEJIANG ELECTRIC POWER COMAPNY
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