Direct current partial discharge source detecting and recognizing device

A technology for identifying devices and discharge sources, applied in the direction of testing dielectric strength, etc., to achieve the effect of improving resolution and sensitivity

Inactive Publication Date: 2014-01-29
GUANGXI POWER GRID ELECTRIC POWER RES INST +1
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Problems solved by technology

[0003] The detection of DC partial discharge is an important means of monitoring the state of oil-paper insulation of power transformers. At present, there are few partial discharge detection device systems under DC. In China, only the research group of Professor Wu Guang

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  • Direct current partial discharge source detecting and recognizing device
  • Direct current partial discharge source detecting and recognizing device
  • Direct current partial discharge source detecting and recognizing device

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[0027] The above is only an overview of the solutions of the present invention. In order to more clearly illustrate the technical means of the present invention, the present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0028] The invention adopts an analog active band-pass filter with a bandwidth of 10kHz-40MHz, a high-speed acquisition card with a sampling rate of 100MS / s and an industrial computer to realize DC partial discharge source detection, discharge source classification and pattern recognition. The device of the present invention can record a single partial discharge pulse current waveform and its occurrence time, extract the pulse current pulse to form a pulse time sequence, and adopt the partial discharge pulse group rapid classification technology based on the pulse characteristics to divide the original pulse group into several sub-pulse groups. Subsequently, the fingerprint information of ea...

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Abstract

The invention discloses a direct current partial discharge source detecting and recognizing device. The direct current partial discharge source detecting and recognizing device comprises a band-pass filter, a high speed capture card and an industrial personal computer, is capable of realizing direct current partial discharge source detection, classification and mode recognition, and is applicable to transformer paper oil insulation partial discharge experiment. An analog front end of the device is provided with 40M simulation bandwidth, so that high-frequency component of partial discharge pulse signal is guaranteed to be correctly acquired; resolution of high-speed capture card is 10 bits, so that resolution and sensibility of the device during partial discharge pulse collection. The device is capable of recording partial discharge pulse waveform and happening moments to form pauls time sequence, adopting partial discharge pulse cluster rapid classifying technology to classify original pulse cluster into a plurality of auxiliary pulse clutter to abstract discharge fingerprint according to pulse waveform characteristics and at last utilizing fault characteristics data base to perform discharge type judgment on the auxiliary pulse clutter. The direct current partial discharge source detecting and recognizing device has typical characteristics functions such as external disturbance eliminating function, multiple partial discharge source separating function and partial discharge mode recognition function.

Description

technical field [0001] The invention belongs to the technical field of partial discharge monitoring of high-voltage equipment. Specifically, it is a DC partial discharge source detection device and identification device. Background technique [0002] The power transformer is one of the important electrical equipment in the power system. Once an accident occurs, it will take a long time to repair and cause serious impact. With the rapid development of my country's electric power industry and the continuous expansion of the power grid, the stand-alone capacity and installed capacity of power transformers continue to increase, and the voltage level is also continuously improved. Generally speaking, the larger the capacity and the higher the voltage level, the greater the loss caused by transformer failure. In recent years, although the reliability of power transformers has been improved due to the improvement of materials, design methods and manufacturing technologies, unexpe...

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Application Information

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IPC IPC(8): G01R31/12
Inventor 梁俊斌邓雨荣郭丽娟陶松梅张炜吴秋丽邬蓉蓉吕泽承唐明雷文
Owner GUANGXI POWER GRID ELECTRIC POWER RES INST
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