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Partial discharge electromagnetic wave attenuation characteristic test device

A technology of attenuation characteristics and test device, applied in the direction of measuring device, measuring electricity, measuring electrical variables, etc., can solve problems such as economic losses, and achieve the effect of avoiding insulation breakdown faults

Inactive Publication Date: 2020-01-14
YUNNAN POWER GRID CO LTD ELECTRIC POWER RES INST
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  • Application Information

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Problems solved by technology

[0004] The invention provides a test device for the attenuation characteristics of partial discharge electromagnetic waves. Its pulse source signal generator transmits through UHF sensors and receives test methods through UHF sensors at different positions, which can test the attenuation characteristics of on-site GIS electromagnetic wave signals to avoid Insulation breakdown failure is caused, causing economic losses

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  • Partial discharge electromagnetic wave attenuation characteristic test device
  • Partial discharge electromagnetic wave attenuation characteristic test device
  • Partial discharge electromagnetic wave attenuation characteristic test device

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Embodiment

[0034] like figure 1 Shown, the structure schematic diagram of GIS partial discharge electromagnetic wave attenuation characteristic test device of the present invention;

[0035] A partial discharge electromagnetic wave attenuation characteristic test device is characterized in that: GIS shell 1, high voltage conductor 2, pot insulator 3, UHF sensor 4, butterfly insulator 5, pulse source signal generator 6, oscilloscope 7, cable 8; UHF The sensors 4 are respectively installed at 4 different positions, among which the 4 sensors are all mounted on the metal flange of the pot insulator with a distance of 20cm, and the 4 sensors are connected to the oscilloscope 7 through the cable 8;

[0036] Pulse source signal generator 6 adopts ps level signal generator among the present invention, and it can produce the steep pulse that rising edge is 300ps, can launch the electromagnetic wave signal of place frequency range between 300MHz-3GHz by UHF sensor, and its receiving frequency is a...

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Abstract

The invention provides a partial discharge electromagnetic wave attenuation characteristic test device comprising GIS shells, a high-voltage conductor, UHF sensors, basin type insulators, a disc typeinsulator, a pulse source signal generator, an oscilloscope and a cable. The eight basin type insulators are arranged in the test device; and the UHF sensors are arranged at in flange small holes of the basin type insulators. The sensors for transmission and receiving are installed at four different positions respectively and are connected with the oscilloscope. Attenuation characteristics of electromagnetic waves can be obtained by testing attenuation characteristics of the electromagnetic waves at different structures of the GIS, such as three typical GIS structures of I type, L type and T type. According to the invention, measurement of the attenuation of the on-site GIS partial discharge electromagnetic wave signal can be realized; the attenuation characteristics of the partial discharge electromagnetic wave signal during the propagation in the GIS can be obtained; and thus a sufficient basis is provided for the distribution positions of on-site UHF sensors.

Description

technical field [0001] The invention relates to the technical field of partial discharge detection of electrical equipment, in particular to a partial discharge electromagnetic wave attenuation characteristic test device. Background technique [0002] Closed gas-insulated combined electrical equipment (GIS) has a small footprint and good insulation performance and is widely used in power grids. However, due to the fully enclosed structure of this structure, once an accident occurs, the consequences will be more serious than open equipment. Much more, and its troubleshooting is extremely complex. [0003] GIS is easy to introduce defects during the manufacturing and installation process, such as dust, conductive particles, excessive stress, metal tips, loose interior, etc., which will cause breakdown or flashover under the action of the electric field. Before these insulation faults occur, they are often accompanied by partial discharge. The appearance of partial discharge ...

Claims

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Application Information

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IPC IPC(8): G01R31/12
CPCG01R31/1227
Inventor 彭晶王科谭向宇邓云坤耿英三闫静马仪赵现平李昊刘红文张文斌
Owner YUNNAN POWER GRID CO LTD ELECTRIC POWER RES INST
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