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EPR cable service life estimation method based on multiscale space spectrogram information

A spatial spectrum, multi-scale technology, applied in the identification, calculation, and measurement of patterns in signals, etc., can solve the problem of lack of discussion on the estimation of the service life of EPR cables.

Active Publication Date: 2019-12-31
SOUTHWEST JIAOTONG UNIV
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0003] Under the background of the rapid development of the current railway industry, the discussion on the estimation of the service life of EPR cables is relatively lacking

Method used

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  • EPR cable service life estimation method based on multiscale space spectrogram information
  • EPR cable service life estimation method based on multiscale space spectrogram information
  • EPR cable service life estimation method based on multiscale space spectrogram information

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Embodiment Construction

[0054] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0055] The method for estimating the service life of EPR cables based on multi-scale spatial spectrogram information includes the following steps:

[0056] Step 1: Build a partial discharge spectrum test platform

[0057] Such as figure 1 , to build a partial discharge spectrum test platform, mainly composed of high-frequency voltage source (1), No. 1 outlet port (2), high-voltage insulated wire (3), test cable (4), terminal (5), high-frequency current mutual induction coil (6), No. 1 ground wire (7), No. 1 signal transmission line (8), data collector (9), No. 2 signal transmission line (10), upper computer (11), No. 2 outlet port (12), 2 No. ground wire (13).

[0058] Connect the No. 1 outlet port (2) of the high-frequency voltage source (1) to the terminal (5) of the test cable (4) through a high-voltage insulated wire (3), and insert the high-freq...

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Abstract

The invention disclsoes an EPR cable service life estimation method based on multiscale space spectrogram information. The method comprises the following steps: acquiring local discharge spectrogram information of the actually running cable and a to-be-detected cable, extracting an aging characteristic factor and estimating service life of the to-be-detected cable according to the aging characteristic factor. The method disclosed by the invention can accurately and efficiently estimate service life of an EPR cable and greatly reduce maintenance workload.

Description

technical field [0001] The invention belongs to the field of cable insulation state detection, and in particular relates to a method for estimating the service life of EPR cables based on multi-scale spatial spectrogram information. Background technique [0002] On-board ethylene-propylene rubber cables (EPR) are key high-voltage equipment in high-speed trains and electric locomotives. EPR cables are required for the connection of various high-voltage electrical equipment in the on-board power supply system. The use status of EPR cables directly affects the safety and security of the traction power supply system. stability and economic operation. EPR insulation is an important part of the cable, and it is also a part that is easily damaged during the operation of the cable. The decline of cable insulation performance will not only cause a large amount of power loss, but also pose a serious safety risk. In the slightest, the working current in the pantograph-catenary line wi...

Claims

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Application Information

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IPC IPC(8): G01R31/12G06K9/00G06K9/62G06F17/16G06F17/15
CPCG01R31/1272G06F17/16G06F17/15G06F2218/02G06F2218/08G06F18/213
Inventor 郭蕾曹伟东张靖康邢立勐杨涵权圣威
Owner SOUTHWEST JIAOTONG UNIV
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