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Method for simulating transmission property of partial discharge signal in power cable

A power cable and discharge signal technology, applied in the direction of electrical digital data processing, special data processing applications, instruments, etc., can solve the problems of high price and high detection cost, and achieve the effect of low cost and simple operation

Inactive Publication Date: 2011-08-17
WUHAN UNIV
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  • Abstract
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  • Application Information

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Problems solved by technology

At present, the equipment for detecting the propagation characteristics of partial discharge signals in cables has the problems of high price and high detection cost

Method used

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  • Method for simulating transmission property of partial discharge signal in power cable
  • Method for simulating transmission property of partial discharge signal in power cable
  • Method for simulating transmission property of partial discharge signal in power cable

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Embodiment Construction

[0032] For the partial discharge signal, its frequency can reach hundreds of MHz. At this time, the lumped parameter circuit model should not be established at low frequency, but the equivalent circuit model of coaxial cable under high frequency signal should be established, and then according to the high frequency signal Under the equivalent circuit model of the coaxial cable, establish a suitable model to simulate the propagation characteristics of the signal in the cable.

[0033] The technical solutions of the present invention will be further described below through embodiments in conjunction with the accompanying drawings.

[0034] like figure 1 Shown is a method for simulating the propagation characteristics of partial discharge signals in power cables proposed by the present invention, specifically as follows:

[0035] Step 1, according to the electrical parameters of the power cable, use R - L - C Network to establish the equivalent circuit model of the coaxial ca...

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Abstract

The invention discloses a method for simulating transmission property of a partial discharge signal in a power cable, comprising the following steps of: step 1, creating an equivalent circuit model of a coaxial cable under a high frequency signal through an R-L-C network according to electrical parameters of the power cable, and calculating R, L and C distribution parameter matrixes of the equivalent circuit model through a finite element method; step 2, creating a frequency varying factor related finite-different time-domain method iterative model according to the R, L and C distribution parameter matrixes; and step 3, simulating the transmission property of the signal in the cable through the finite-different time-domain method iterative model. The method offers effective help for in-depth study on the transmission property of the partial discharge in the cable, particularly on high-frequency transmission mechanism, and implementing accurate detection and positioning of partial discharge.

Description

[0001] technical field [0002] The invention relates to the field of partial discharge, in particular to a method for simulating the propagation characteristics of partial discharge signals in power cables. Background technique [0003] The partial discharge (PD) that occurs inside the cable can generate pulses with a frequency up to hundreds of MHz. The pulses generated by the partial discharge will be severely attenuated and waveform distortion when propagating in the cable. Therefore, in order to achieve accurate detection and location of partial discharge , it is necessary to deeply study the propagation characteristics of partial discharge in cables, especially the high-frequency propagation mechanism of partial discharge in cables. At present, the equipment for detecting the propagation characteristics of the partial discharge signal in the cable has the problems of high price and high detection cost. Contents of the invention [0004] Aiming at the deficiencies in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
Inventor 杜志叶阮江军赵淳
Owner WUHAN UNIV
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