Through type cophase traction power supply system traction network fault interval traveling wave positioning method

A technology of traction power supply system and fault interval, applied in the direction of fault location, etc., can solve problems such as inaccurate positioning and influence of traveling waves, achieve the effects of reducing power outage time, strong ability to withstand transition resistance, and improving power supply reliability

Inactive Publication Date: 2015-12-30
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, most researches on the location of fault intervals in electrified railway traction networks are based on the impedance method, which is easily affected by external conditions such as excessive resistance, and is prone to inaccurate positioning. The power supply system mainly realizes the conversion from thr

Method used

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  • Through type cophase traction power supply system traction network fault interval traveling wave positioning method
  • Through type cophase traction power supply system traction network fault interval traveling wave positioning method
  • Through type cophase traction power supply system traction network fault interval traveling wave positioning method

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Experimental program
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Effect test

Embodiment 1

[0034] Embodiment 1: as Figure 1-6 As shown, a traveling wave location method for the fault zone of the traction network of a through-type in-phase traction power supply system, the specific steps of the method are:

[0035] A. After a fault occurs on the traction network of the through-type same-phase traction power supply system, the data acquisition devices of each traction substation collect the current within the 10ms time window after the fault occurs;

[0036] B. Obtain the maximum value of the wavelet transform modulus of the fault current signal at the exit of each traction substation;

[0037] C. Compare the modulus maximum polarity of the current traveling wave signal at each outlet;

[0038] If the polarity of the fault current traveling wave modulus maxima at the exits of two adjacent traction substations is opposite, the fault occurs between these two traction substations;

[0039] If the maximum polarity of fault current traveling wave modulus at the exits of...

Embodiment 2

[0040] Embodiment 2: as Figure 1-6 As shown, a traveling wave location method for the fault zone of the traction network of a through-type in-phase traction power supply system, the specific steps of the method are:

[0041] A. After a fault occurs on the traction network of the through-type same-phase traction power supply system, the data acquisition devices of each traction substation collect the current within the 10ms time window after the fault occurs;

[0042] B. Obtain the maximum value of the wavelet transform modulus of the fault current signal at the exit of each traction substation;

[0043] C. Compare the modulus maximum polarity of the current traveling wave signal at each outlet;

[0044] If the polarity of the fault current traveling wave modulus maxima at the exits of two adjacent traction substations is opposite, the fault occurs between these two traction substations;

[0045] If the maximum polarity of fault current traveling wave modulus at the exits of...

Embodiment 3

[0048] Embodiment 3: as Figure 1-6 As shown, a traveling wave location method for the fault zone of the traction network of a through-type in-phase traction power supply system, the specific steps of the method are:

[0049] A. After a fault occurs on the traction network of the through-type same-phase traction power supply system, the data acquisition devices of each traction substation collect the current within the 10ms time window after the fault occurs;

[0050] B. Obtain the maximum value of the wavelet transform modulus of the fault current signal at the exit of each traction substation;

[0051] C. Compare the modulus maximum polarity of the current traveling wave signal at each outlet;

[0052] If the polarity of the fault current traveling wave modulus maxima at the exits of two adjacent traction substations is opposite, the fault occurs between these two traction substations;

[0053] If the maximum polarity of fault current traveling wave modulus at the exits of...

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Abstract

The invention relates to a through type cophase traction power supply system traction network fault interval traveling wave positioning method, and belongs to the technical field of electrified railway traction network fault interval positioning research. The method comprises the steps that A, after a fault occurs on a through type cophase traction power supply system traction network, the data acquisition devices of all traction substations acquire current within 10ms time window after occurrence of the fault; B, the fault current signal wavelet transform modulus maxima of the outlet of each traction substation is obtained; and C, the polarities of the current traveling wave signal modulus maximas of all the outputs are compared. If the polarities of the fault current traveling wave modulus maximas of the two adjacent traction substations are opposite, the fault occurs between the two traction substations; or the fault position is not between the two traction substations. According to the method, the through type cophase traction power supply system fault interval traveling wave positioning method is indicated to be accurate and reliable through the simulation result.

Description

technical field [0001] The invention relates to a traveling wave positioning method for fault intervals of a traction network of a through-type in-phase traction power supply system, and belongs to the technical field of research on fault interval positioning of an electrified railway traction network. Background technique [0002] The traction network is mainly responsible for the power transmission along the railway and the strong electrical and mechanical impact caused by the frequent operation of electric locomotives, and the traction network is set in the open air, and its working environment is very harsh. Therefore, traction network failures occur from time to time, and the failures are frequent and there is no backup, which seriously affects the safe operation of electrified railways. The traction network short-circuit ground fault is the most likely to occur. Therefore, the research on the location of the fault zone of the traction network is conducive to reducing ...

Claims

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Application Information

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IPC IPC(8): G01R31/08
Inventor 陈仕龙黄钰淇李兴旺毕贵红李建平王燕武罗璐
Owner KUNMING UNIV OF SCI & TECH
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