Mining XLPE cable insulation cable electric branch growing stage identification method based on sparse decomposition

A growth stage, cable insulation technology, applied in character and pattern recognition, instruments, computer parts and other directions, can solve the problem of not involving the identification method of electric tree growth stage, not proposed the division method of electric tree growth stage, etc. The effect of recognition difficulty and high recognition rate

Active Publication Date: 2019-02-15
TAIYUAN UNIV OF TECH
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Problems solved by technology

[0004] Although the predecessors have described the shape changes and partial discharge characteristics of electrical trees under power frequency voltage, they have not proposed the division method of electrical tree growth stages, nor have they involved the identification method of electrical tree growth stages

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  • Mining XLPE cable insulation cable electric branch growing stage identification method based on sparse decomposition
  • Mining XLPE cable insulation cable electric branch growing stage identification method based on sparse decomposition
  • Mining XLPE cable insulation cable electric branch growing stage identification method based on sparse decomposition

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Embodiment Construction

[0022] Below in conjunction with accompanying drawing and example the present invention is further described: a kind of mine XLPE cable insulation electrical branch growth stage pattern recognition method based on sparse decomposition, comprises the following steps.

[0023] (1) Establish a complete atomic dictionary for the growth stage of electrical dendrites in the insulation of mining XLPE cables;

[0024] In order to establish a complete atomic dictionary of the growth stages of electrical dendrites in mining XLPE cable insulation, the experiment of electrical dendrite cultivation under power frequency voltage should be carried out first, to obtain typical electrical dendrite growth samples in mining XLPE cable insulation, and to measure and record the electrical dendrite growth in real time. The growth shape and partial discharge data during the growth process of the electric tree, and then divide the growth process based on the growth length and speed of the electric tre...

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Abstract

The invention provides a mining XLPE cable insulation cable electric branch growing stage identification method based on sparse decomposition, which comprises two steps of establishing an over-complete atom dictionary in electric tree growing stage in mining XLPE cable insulation and identifying electric tree growing stage in mining XLPE cable insulation. The method of the invention introduces thesparse decomposition theory into the identification of the electric tree growing stage of the mining XLPE cable insulation under the power frequency voltage, establishes an over-complete atom dictionary of the electric tree growing stage, and in the actual use process, the electric tree growing image data need not be collected, and the data, such as the skewness Sk + and the steepness Ku-, etc.,are used directly. A matching pursuit algorithm is used to identify the electrical tree growth stage of a to-be-tested sample, thereby reducing the difficulty of identification.

Description

technical field [0001] The invention relates to the technical field of cable insulation fault identification, in particular to a method for identifying the growth stage of electrical branches in mining XLPE cable insulation based on sparse decomposition. Background technique [0002] The development of coal mining technology in fully mechanized mining face with large mining height has promoted the improvement of the power supply voltage level of coal mines, and more and more mines use 10kV voltage to enter the well. Cross-linked polyethylene insulated (Cross-linked Polyethylene, XLPE) cables are commonly used fixed laying power cables in coal mines. Due to their inevitable defects in the manufacturing and installation process, such as impurities, semiconductor layer protrusions, air bubbles, etc. These defects are likely to cause electrical trees when subjected to the combined stress of electricity, heat, and environment in coal mines for a long time. At the same time, the ...

Claims

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Application Information

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IPC IPC(8): G06K9/62
CPCG06F18/22G06F18/2136G06F18/214
Inventor 雷志鹏宋建成曾君湘田慕琴温敏敏李璐
Owner TAIYUAN UNIV OF TECH
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