Fault distance measuring method for non-parallel-state uplink and downlink traction network where partitions are located

A technology of fault location and partitioning, which is applied in the field of electrical engineering and can solve problems such as fault location that cannot be solved

Inactive Publication Date: 2014-02-19
SOUTHWEST JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Existing technology cannot solve fault

Method used

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  • Fault distance measuring method for non-parallel-state uplink and downlink traction network where partitions are located
  • Fault distance measuring method for non-parallel-state uplink and downlink traction network where partitions are located
  • Fault distance measuring method for non-parallel-state uplink and downlink traction network where partitions are located

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Experimental program
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specific Embodiment approach

[0029] figure 1 Each switch in the center is in the closed position, and the traction network and downlink are in parallel state in the substation, AT station and partition station.

[0030] like figure 2 As shown, the substation, AT station and partition station are equipped with fault location devices. Among them, the fault location device configured in the substation not only collects the data of the substation, but also receives the fault data collected by the AT station and the partition station at the same time, and performs fault detection. Ranging analysis. The ranging system is configured with a dedicated fiber channel for transmitting fault data.

[0031] Judgment of fault type:

[0032] When the sinking current of the substation and AT is less than I zd , it is judged that the fault is a TF fault, where, I zd For empirical data, I zd =1200A.

[0033] When a TF fault occurs, when -20°≤θ≤160°, it is judged that the fault occurs in the uplink; when -180°≤θ and ...

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Abstract

The invention belongs to the field of electrical engineering and particularly relates to a fault distance measuring method for a non-parallel-state uplink and downlink traction network where partitions are located in a high-speed rail power supply traction network. The method is used for judging fault types and directions in the state and accurately positioning fault points. According to the method, an uplink and downlink current ratio is defined, fault distance determining is performed according to the uplink and downlink current ratio fault distance measuring principle and the reactance method, and therefore the problem that distance measuring of the non-parallel-state uplink and downlink traction network where the partitions are located cannot be performed by an existing fault distance measuring system is solved. Meanwhile, uplink and downlink faults and the fault types cannot be accurately judged, correct fault distances are given out, the fault points can be fast found out, and fast power supply restoration of the high-speed rail power supply traction network can be guaranteed.

Description

technical field [0001] The invention belongs to the field of electrical engineering, and the invention relates to a fault distance measuring method in which the uplink and downlink traction networks where the partitions of the high-speed railway power supply traction network are located are not in a parallel state. Background technique [0002] In today's highly developed economy, the railway is moving towards high-speed and heavy-duty direction, and the construction of high-speed railway is in line with the needs of my country's economic development and national conditions. The high-speed railway must adopt electric traction, and the power supply system is an important part of the electrified railway, so the choice of its power supply mode becomes one of the key factors in the development of high-speed railway. With its own advantages, the AT power supply method has been widely used in France, Japan and other countries, and it has also attracted more and more attention from...

Claims

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Application Information

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IPC IPC(8): G01R31/08
CPCY04S10/522Y04S10/52
Inventor 林国松陈小川韩正庆
Owner SOUTHWEST JIAOTONG UNIV
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