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Test device used for measuring partial discharge signal attenuation in ultrasonic method

A technique for measuring discharge signals and attenuation, which is used in measuring devices, circuit breaker testing, and measuring ultrasonic/sonic/infrasonic waves, etc.

Active Publication Date: 2014-11-12
STATE GRID CORP OF CHINA +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, there is no test and measurement device specially used for partial discharge signal attenuation in the market

Method used

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  • Test device used for measuring partial discharge signal attenuation in ultrasonic method

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Embodiment Construction

[0013] Example of a test setup for measurement of partial discharge signal attenuation by ultrasonic method, such as figure 1 As shown, the test device includes a high-voltage lead terminal, a horizontal bus sleeve 11, a disconnector 12 and a vertical bus sleeve 13, and the high-voltage lead terminal includes an external terminal sleeve 14 and a high-voltage lead 15 located in the terminal sleeve 14, The terminal sleeve 14 of the high-voltage lead terminal is arranged vertically and is fixedly equipped with a first busbar adapter barrel 16 at the lower end. The lower end of the first busbar adapter barrel 16 is fixedly connected with a first support seat 17. The upper end is closed by an end cover 18, wherein an upper insulator 19 and a lower insulator 20 are arranged at an interval between the upper and lower insulators, a vertical high-voltage conductor 21 is arranged between the upper and lower insulators, and a shielding head is arranged at the upper end of the vertical hig...

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Abstract

The invention relates to the technical field of partial discharge detection, in particular to a test device used for measuring ultrasonic partial discharge signal attenuation in an ultrasonic method. The test device comprises a high-voltage lead terminal, a horizontal bus sleeve and a vertical bus sleeve, a horizontal high-voltage conductor is arranged in the horizontal bus sleeve, a vertical high-voltage conductor is arranged in the vertical bus sleeve, the high-voltage lead terminal is connected with the horizontal high-voltage conductor, the vertical high-voltage conductor is connected with the horizontal high-voltage conductor through an isolation switch, the connection portion of the isolation switch and the vertical high-voltage conductor is of an L-type structure, the portion of the L-type structure between the high-voltage lead terminal and the horizontal high-voltage conductor is provided with a discharge pointed end, ultrasonic sensors are arranged in the horizontal bus sleeve, on the isolation switch and in the vertical bus sleeve respectively, and the ultrasonic sensors are all connected with an oscilloscope through coaxial cables identical in length. The test device can provide a theoretical basis for best installation positions and the number of the ultrasonic sensors in a partial discharge online monitoring system.

Description

technical field [0001] The invention relates to the technical field of partial discharge detection, in particular to a test device for measuring the attenuation of partial discharge signals by an ultrasonic method. Background technique [0002] Gas-insulated switchgear (GIS) has been widely used in electrical systems due to its high reliability and small footprint. As an important manifestation of insulation damage of power equipment, partial discharge widely exists in all kinds of operating equipment. Due to the limitations of the manufacturing process and the requirements of operating voltage, it is impossible and unreasonable to completely avoid the occurrence of partial discharge in operating electrical equipment Yes, but it is necessary to limit the partial discharge level and required level of electrical insulating materials. [0003] The partial discharge detection of gas insulated switchgear can effectively understand the insulation status of the equipment and timel...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01H17/00G01R31/12G01R31/327
Inventor 刘宝宝张高潮曾其武马悦许嘉宁
Owner STATE GRID CORP OF CHINA
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