A distance measuring method and system for a short-circuit fault of a DC rail transit power supply line

A technology for short-circuit faults and rail transit, which is applied in the direction of measuring electricity, measuring devices, and measuring electrical variables, etc., and can solve problems such as long fault recovery time and labor-intensive

Active Publication Date: 2019-04-23
WUHAN ZHONGZHI ELECTRIC
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

After a fault occurs, it can only be searched manually, which makes the fault recovery time very long and consumes a lot of manpower

Method used

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  • A distance measuring method and system for a short-circuit fault of a DC rail transit power supply line
  • A distance measuring method and system for a short-circuit fault of a DC rail transit power supply line
  • A distance measuring method and system for a short-circuit fault of a DC rail transit power supply line

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Embodiment Construction

[0036] The principles and features of the present invention are described below in conjunction with the accompanying drawings, and the examples given are only used to explain the present invention, and are not intended to limit the scope of the present invention.

[0037] Such as figure 1 As shown, a distance measuring method for a short-circuit fault of a DC rail transit power supply line includes the following steps,

[0038] S1, to detect whether a permanent short-circuit fault occurs on the DC rail transit power supply line; among them, the permanent short-circuit fault detection is performed by using the automatic start detection function of the feeder protection device: after a fault occurs, the DC feeder circuit breaker trips, and then the feeder protection device will automatically Start the line test; if it is confirmed that a permanent short-circuit fault has occurred, it is necessary to calculate the distance of the short-circuit fault in order to find the fault poi...

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PUM

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Abstract

The invention relates to a range finding method and system for a direct current rail transit power supply line short circuit fault. The method comprises the following steps: S1, whether a permanent short-circuit fault occurs on a DC rail transit power supply line is detected; S2, when the permanent short-circuit fault occurs on the DC rail transit power supply line and the pantograph falling of a vehicle does not does not occur, the distance between a sampling point and a short-circuit fault point is obtained through short circuit fault range finding carried out on the sampling point on the direct current rail transit power supply line. The method of the invention can avoid the shortcomings in the prior art which require the vehicle to stop to find the short circuit fault with a lot of manpower and material resources. The method of the invention can quickly find out the short circuit fault point, which is important for the safety of rail transportation and economic operation.

Description

technical field [0001] The invention relates to the field of rail transit fault detection, in particular to a distance measuring method and system for a short-circuit fault of a DC rail transit power supply line. Background technique [0002] After a short-circuit fault occurs in the rail transit DC traction power supply system, it is necessary to quickly find out the fault point in order to resume operation as soon as possible. At present, there are no methods and products for fault location of DC rail transit power supply lines at home and abroad. After a fault occurs, it can only be searched manually, which makes the fault recovery time very long and consumes a lot of manpower. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a distance measuring method and system for a short-circuit fault of a DC rail transit power supply line, which can quickly find out the point where the short-circuit fault occurs, which i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/02
CPCG01R31/50
Inventor 李蕾潘拥军张光平何贤伟毛征孟少华汪文杰陶宏杰张强
Owner WUHAN ZHONGZHI ELECTRIC
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