Method and system for on-line locating power cable fault

A technology of power cable and positioning method, applied in fault location, information technology support system, etc., can solve the problems of high power failure cost and low efficiency, and achieve the effect of efficient positioning and simple and fast positioning process

Active Publication Date: 2013-04-17
GUANGZHOU POWER SUPPLY BUREAU GUANGDONG POWER GRID CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Based on this, it is necessary to provide a high-efficiency online fault location method and system for power cables for the existing power cable fault location methods.

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  • Method and system for on-line locating power cable fault
  • Method and system for on-line locating power cable fault
  • Method and system for on-line locating power cable fault

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Embodiment Construction

[0029] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below according to the drawings and embodiments. It should be understood that the specific implementations described here are only used to explain the present invention, not to limit the present invention.

[0030] At present, there is no technical precedent for using distributed optical fiber to locate power cable fault points based on the Rayleigh scattering principle. In the past, the methods for locating fault points of high-voltage power cables were mostly offline methods, which took a long time to find fault points and caused large power failure losses. , the cost is high, and the power cable fault on-line location method and system of the present invention make up for the gap in my country's technology for distributed optical fiber online measurement of power cable fault points.

[0031] The basic principle of o...

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Abstract

The invention provides a method and a system for on-line locating a power cable fault. The method is characterized by converting a vibration signal of a power cable into an optical signal by utilizing an optical cable which is parallelly and tightly laid with the power cable in an adhesion way, carrying out monitoring treatment for the optical signal by utilizing an optical fiber vibration sensing system, and finally obtaining the position of a fault point of the power cable by analyzing. According to the method for on-line locating the power cable fault, provided by the invention, an on-line mode is adopted, the technology of distributed optical fibers in a vibration measuring aspect is applied to high-voltage power cable fault point detecting and finding, the purpose of efficiently locating the fault point of the power cable under an on-line state is realized, and the method and the system have actual social benefit.

Description

technical field [0001] The invention relates to the technical field of fault location, in particular to a power cable fault online location method and system. Background technique [0002] At present, there are few methods for online location of land power cable fault points, and almost none of them can be applied in actual engineering. In the past, offline methods were mostly used to detect power cable fault points. [0003] Cable fault detection instruments at home and abroad mostly use the bridge method, voltage comparison method, and traveling wave reflection method to develop and update the instrument. Although some technical means are becoming mature, these methods have a common disadvantage: Offline mode, low efficiency and long search time. Contents of the invention [0004] Based on this, it is necessary to provide an efficient online fault location method and system for power cables to address the problems of high cost and low efficiency of offline power outages...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/08
CPCY04S10/52
Inventor 黄嘉盛陈继鑫曹京荥慕容啟华
Owner GUANGZHOU POWER SUPPLY BUREAU GUANGDONG POWER GRID CO LTD
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