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Power transmission line fault detection

A transmission line and fault detection technology, applied in the direction of short-circuit test, fault location, high resistance measurement, etc., can solve the problem of low fault repair efficiency

Active Publication Date: 2021-03-23
ZHONGTIAN TECH SUBMARINE CABLE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, there is currently no method to accurately obtain the fault point of the above-mentioned transmission line, which leads to low fault repair efficiency when the above-mentioned transmission line fails

Method used

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Embodiment Construction

[0071] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0072] For the scene of synchronous transmission of electric energy between offshore wind farms, island AC power grids, etc., and land AC power grids, power transmission lines usually use a combination of submarine cables and land cables. That is to say, the transmission line includes: a submarine cable segment and an onshore cable segment. ...

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Abstract

The invention provides power transmission line fault detection. The fault detection method comprises the steps of obtaining a resistance value of an insulation resistor of a power transmission line, the power transmission line comprising an onshore cable section and a submarine cable section; determining whether the power transmission line has a fault based on the resistance value of the insulation resistor; when the power transmission line has a fault, obtaining the position of a fault point of the power transmission line on the power transmission line; determining a target cable section to which the fault point belongs based on the position of the fault point on the power transmission line, the target cable section being an onshore cable section or a submarine cable section; and locatingthe position of the fault point at the target cable section to which the fault point belongs. According to the invention, the position of the fault point of the power transmission line with the landcable and the submarine cable can be accurately located.

Description

technical field [0001] The present application relates to cable fault detection technology, in particular to a transmission line fault detection. Background technique [0002] Submarine cables refer to cables laid on the seabed wrapped with insulating materials. They are important carriers for synchronous transmission of electric energy between offshore wind farms, island AC grids, etc., and land AC grids. They have the characteristics of large length, large capacity, and high voltage. With the continuous expansion of the development scale of marine resources such as offshore wind power and island development, more and more submarine cables have been laid. That is to say, there are more and more transmission lines composed of submarine cables and land cables. [0003] However, currently there is no method for accurately obtaining the fault point of the above-mentioned transmission line, which leads to low fault recovery efficiency when the above-mentioned transmission line ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/08G01R31/12G01R27/02G01R31/52G01R31/54G01R31/58
CPCG01R31/085G01R31/1272G01R27/025G01R31/52G01R31/54G01R31/58Y04S10/52
Inventor 徐拥军李雷鲍玉峰胡明张洪亮赵惜阳
Owner ZHONGTIAN TECH SUBMARINE CABLE CO LTD
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