Cable fault on-line monitoring system

A technology for monitoring system and cable faults, which is applied in the field of monitoring systems, can solve the problems of long positioning delay, affecting power supply reliability, failure to locate faults, etc., and achieve the effect of improving reliability

Inactive Publication Date: 2014-06-25
ZHUHAI GENE COSMOS ELECTRIC TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, power supply enterprises usually use manual inspection for fault monitoring of cable lines, and sometimes even have to determine the line segment where the fault occurs by pulling the segment switch and passing through the substat

Method used

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  • Cable fault on-line monitoring system

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Embodiment Construction

[0017] Such as figure 1 As shown, in this embodiment, the system of the present invention includes several sets of fault monitoring modules, a communication center, a background monitoring center, a thermometer and a plurality of temperature detection modules, wherein the fault monitoring modules are respectively installed on the cables to be detected in different positions. Each set of fault monitoring modules includes: respectively fixed on each single-phase wire in the three-phase cable, three current detection modules I for detecting short-circuit current and current temperature on each single-phase wire, and three current detection modules I fixed on three On the phase cable bus, the current detection module II that detects the ground current, load current and current temperature of the three-phase cable bus; the communication center is connected with the current detection module I and the current detection module II, and collects the short circuit of the cable Current, ...

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Abstract

The invention provides a cable fault on-line monitoring system. A plurality of sets of fault monitoring modules are arranged on a cable circuit to be detected in a subsection mode, the short-circuit current, the grounding current, the load current and the current temperature of the cable circuit are detected, and the detected data are sent to a background monitoring center through a communication center; in addition, a temperature detection module is arranged so that the equipment temperature at a position to be detected in high-voltage equipment can be collected, a thermodetector is used for sending the temperature data to the background monitoring center, and therefore when the circuit breaks down, synthetic judgment can be carried out at the background monitoring center. Furthermore, when the circuit breaks down, a fault indication module is used for giving an alarm, fault points can be quickly known by remote control workers or field maintenance workers, and thus fault detection reliability can be improved. The cable fault on-line monitoring system can be applied to the technical field of electric power fault detection.

Description

technical field [0001] The invention relates to a monitoring system, in particular to an online cable fault monitoring system in the electric power field. Background technique [0002] At present, in the overhead distribution network operation system, there are many branches and the operation mode is complicated. Many high-voltage electrical equipment in the power grid itself and the connection point between the equipment are the weakest link in power transmission. The real problem of this weak link is the heating of the connection point. As the load increases, the connection point will heat up and form a vicious cycle: temperature rise, expansion, contraction, oxidation, resistance increase, and then heat up again until an accident occurs. At present, power supply enterprises usually use manual inspection for fault monitoring of cable lines, and sometimes even have to determine the line segment where the fault occurs by pulling the segment switch and passing through the su...

Claims

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Application Information

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IPC IPC(8): G01R31/08
Inventor 肖高林
Owner ZHUHAI GENE COSMOS ELECTRIC TECH
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