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XLPE power cable typical defect partial discharge type identification system and method

A partial discharge and power cable technology, applied in the field of partial discharge type identification system for typical defects of XLPE power cables, can solve the problems of low neural network iteration efficiency, large convergence probability constraints, poor recognition accuracy, etc., to improve recognition efficiency and recognition accuracy, the effect of improving the convergence speed

Inactive Publication Date: 2020-12-29
YANGJIANG POWER SUPPLY BUREAU OF GUANGDONG POWER GRID
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Problems solved by technology

The traditional XLPE power cable partial discharge recognition technology is based on the trainable BP neural convergence network, which is obtained through sample training and testing. At this time, the neural network iteration efficiency is low, the convergence probability is greatly restricted by the sample data, and the recognition accuracy is not good.

Method used

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  • XLPE power cable typical defect partial discharge type identification system and method
  • XLPE power cable typical defect partial discharge type identification system and method
  • XLPE power cable typical defect partial discharge type identification system and method

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Embodiment Construction

[0018] Below in conjunction with accompanying drawing and specific embodiment the present invention is described in further detail:

[0019] A partial discharge type identification system for typical defects in XLPE power cables, such as figure 1 and 2 As shown, it includes a data module 1, a feature extraction module 2, a training module 3 and an identification module 4, wherein the data module 1 is used to carry out partial discharge data of typical XLPE power cables measured by various partial discharge measurement methods Weight fitting, the partial discharge data is the power generation amount and the corresponding phase, superimposing the obtained partial discharge data, and obtaining a partial discharge pulse signal through a discharge screening program;

[0020] The feature quantity extraction module 2 is used to draw time-based analysis mode time-domain spectrogram and phase-based analysis mode frequency-domain spectrogram by using partial discharge pulse signal, and...

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Abstract

The invention relates to an XLPE power cable typical defect partial discharge type identification system. The identification system is characterized by comprising a data module, a characteristic quantity extraction module, a training module and an identification module, wherein the data module is used for carrying out weight fitting on typical XLPE power cable partial discharge data measured by utilizing multiple partial discharge measurement methods; and the partial discharge data are generated energy and a corresponding phase, the obtained partial discharge data are superposed, and a partialdischarge pulse signal is obtained through a discharge screening program. According to the system, the accuracy and convergence rate of XLPE power cable partial discharge type identification can be improved.

Description

technical field [0001] The invention relates to the technical field of partial discharge of power distribution equipment, in particular to a system and method for identifying partial discharge types of typical defects of XLPE power cables. [0002] technical background [0003] Cross-linked polyethylene (XLPE) insulated power cables are widely used in the field of flexible direct current transmission. Due to the relatively complicated manufacturing and installation process of XLPE cables, and the harsh operating environment, different types of insulation defects often occur at different positions of the cable. The partial discharge phenomenon at the defect location will cause the insulation damage of the cable equipment, but it also contains the defect type information at the fault location, so partial discharge measurement is considered to be an effective means to detect and identify XLPE cable insulation defects. With the continuous improvement of DC cable line voltage lev...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/12G06N3/04G06N3/08
CPCG01R31/1272G06N3/084G06N3/044
Inventor 王清玲何若冰何平陈佳陆婧李晓宇张静倪辉王圆圆
Owner YANGJIANG POWER SUPPLY BUREAU OF GUANGDONG POWER GRID
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