Traction network fault location method, system and medium based on transient sudden change current

A technology of sudden change of current and transient sudden change, applied in fault location, fault detection according to conductor type, measurement of electricity, etc., can solve the problems of high sampling accuracy and difficulty in wave head identification.

Active Publication Date: 2022-04-19
HUAZHONG UNIV OF SCI & TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traveling wave method has high versatility, but it mainly faces problems such as high sampling accuracy and difficulty in wave head identification
Generally speaking, the existing fault location methods are mostly based on steady-state information to carry out fault location, and it is necessary to consider the protection action and power supply mode to make a reasonable selection, less involving the application of transient quantities and the discussion of the impact on high-speed rail traction load, and both have certain limitations

Method used

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  • Traction network fault location method, system and medium based on transient sudden change current
  • Traction network fault location method, system and medium based on transient sudden change current
  • Traction network fault location method, system and medium based on transient sudden change current

Examples

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Effect test

Embodiment 1

[0033] Embodiment one, as figure 1 As shown, a fault location method for traction network based on transient sudden change current, including the following steps:

[0034] S1: Obtain the measured current set of each zone in the traction network to be tested, and obtain the sudden change current set of each zone according to the measured current set of each zone;

[0035] S2: According to the line short-circuit fault criterion and the sudden current set of all areas, judge whether there is a line short-circuit fault in the traction network to be tested, if so, find out at least one potential fault area and execute S3 to S5 in sequence, otherwise return to S1 ;

[0036] S3: Obtain the target fault section and fault location index in each potential fault zone according to the sudden current set of each potential fault zone and the fault zone location criterion;

[0037]S4: According to the sudden change current set of each potential fault area, calculate the difference between ...

Embodiment 2

[0128] Embodiment two, such as Figure 9 As shown, a traction network fault location system based on transient sudden change current is applied to the traction network fault location method based on transient sudden change current in Embodiment 1, including a transient quantity acquisition module, a potential judgment module, Section location module, current aggregation module and fault location module;

[0129] The transient quantity acquisition module is used to obtain the measured current set of each district in the traction network to be tested, and obtain the abrupt current set of each district according to the measured current set of each district;

[0130] The potential judgment module is used to judge whether there is a line short circuit fault in the traction network to be tested according to the line short circuit fault criterion and the sudden current set of all areas, if so, find out at least one potential fault area, otherwise return to the execution station Desc...

Embodiment 3

[0136] Embodiment 3, based on Embodiment 1 and Embodiment 2, this embodiment also discloses a traction network fault location system based on transient sudden change current, including a processor, a memory, and stored in the memory and can run on A computer program on the processor, when the computer program runs, implements the specific steps of S1 to S5.

[0137] Through the computer program stored in the memory and run on the processor, it is possible to determine the section where the fault is located based on the abrupt current in the transient quantity, and accurately calculate the distance from the fault to the traction station, with local communication and distributed The way of fault handling is to realize the high-precision fault location of different line faults in the full parallel AT traction system, so as to realize the accurate isolation and repair of faults. Supplement has a certain reference value.

[0138] This embodiment also provides a computer storage me...

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Abstract

The invention relates to a fault location method, system and medium of a traction network based on a transient sudden change current, obtains a set of measured currents in each district, and obtains a set of sudden changes in each district; Set, judge whether there is a line short-circuit fault, and find out at least one potential fault area; obtain the target fault area, fault location index, and the difference between the transient mutation accumulation current of the cross-connection line in each potential fault area in turn The difference between the accumulated current and the transient sudden change of the cross-connection line on the opposite side; and then calculate the target fault distance in each potential fault area; obtain the fault distance measurement result of the traction network to be tested according to all target fault distances. The present invention determines the section where the fault is located based on the abrupt current in the transient quantity, and accurately calculates the distance from the fault to the traction station, and realizes the fault detection of different lines of the full-parallel AT traction system in the manner of local communication and distributed fault processing High-precision fault location.

Description

technical field [0001] The invention relates to the field of high-speed rail traction systems, in particular to a method, system and medium for fault location of a traction network based on a transient sudden change current. Background technique [0002] In recent years, high-speed railways have developed rapidly. Because of their fast and comfortable features, they have become an important choice for public transportation. Because the railway traction network is exposed to various complex environments all year round, and the power supply methods are complex and diverse, there are different risks of failure, which seriously affect the safe and reliable operation of the railway system. In this regard, it is urgent to propose effective countermeasures to quickly and accurately locate different faults, so as to eliminate faults in time and ensure the good operation of the traction system. [0003] At present, the common fault location methods of railway traction network mainly...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/08G01R31/52G01R31/58
CPCG01R31/086G01R31/088G01R31/52G01R31/58
Inventor 李正天林湘宁王传启宋金川吴宇奇肖樹昱马啸叶雨晴
Owner HUAZHONG UNIV OF SCI & TECH
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