Cable partial discharge pattern recognition method and system

A partial discharge and pattern recognition technology, applied in the direction of testing dielectric strength, etc., can solve the problems of loss of characteristic parameters, low accuracy of characteristic values, slow speed, etc., to improve the recognition rate, avoid insulation breakdown accidents, and reduce the impact. range effect

Inactive Publication Date: 2018-06-15
SOUTHWEST PETROLEUM UNIV +1
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At the same time, the calculation of these statistical feature parameters requires pictures drawn based on a large amount of data, and obtaining their statistical feature parameters also requires a lot of calculations, which makes the calculation of partial discha

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  • Cable partial discharge pattern recognition method and system
  • Cable partial discharge pattern recognition method and system
  • Cable partial discharge pattern recognition method and system

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[0013] In the following, the present invention will be further described in detail in conjunction with the accompanying drawings and embodiments, so as to make the purpose, technical solutions and advantages of the present invention more clear. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0014] figure 1 A flow chart of a method for cable partial discharge pattern recognition according to an embodiment of the present invention is shown. The method of this embodiment comprises the following steps:

[0015] Step 101: Obtain p sets of data corresponding to p sample signals of cable partial discharge

[0016] Specifically, partial discharge monitoring equipment (for example, oscillatory wave test equipment based on the principle of pulse current method) can be directly connected to the monitored XLPE power cable, and the measured partial discharge signal can be amplified...

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Abstract

The invention discloses a cable partial discharge pattern recognition method and system which can be used for reducing the amount of data required for calculation, shortening recognition time, and effectively acquiring electric discharge characteristics of different partial electric discharges. Without losing characteristic parameters the method and system can be used for obtaining significant characteristic values from the subtle parts and improving classification recognition rates. The method comprises the following steps: data in m cycles is taken from each data group and superimposed in one cycle to form atlas data of each data group; 360 degrees in the cycle is subjected to phase window dividing operation in units of the same angle, and n equal-interval phase windows are obtained; thecharacteristic value of the atlas data in the cycle corresponding to each phase window is calculated, and a first characteristic value matrix is obtained; the obtained first characteristic value matrix is subjected to dimension reduction operation so as to obtain a second characteristic value matrix, characteristic values in the second characteristic value matrix are classified and identified viaa pattern identification classifier, and a classification result corresponding to each sample signal is obtained.

Description

technical field [0001] The invention relates to the technical field of power cable partial discharge monitoring, in particular to a method and system for identifying cable partial discharge patterns. Background technique [0002] Because cross-linked polyethylene power cables (XLPE) have good electrical properties and heat resistance, and are light in weight, easy to install and convenient to lay, they are widely used in urban underground power grid transmission. The extensive use of power cables has led to the vigorous development of the matching power cable accessories. However, XLPE power cables in actual operation are affected by factors such as installation process, laying environment, external force damage, and use conditions, causing insulation defects and even insulation breakdown accidents. The proportion is more. It is generally believed at home and abroad that the best method for evaluating the insulation status of XLPE power cables and their accessories is to m...

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Application Information

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IPC IPC(8): G01R31/12
CPCG01R31/12
Inventor 张安安杨林李茜高春林周志通郭霄林燕邓江湖
Owner SOUTHWEST PETROLEUM UNIV
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