Cable fault on-line monitoring system

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...

AI Technical Summary

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 substation for test transmission. The workload of fault location is heavy, and the location delay is relatively long. long, it is impossible to locate the fault in a timely and effective manner, which greatly affects the reliability of power supply

Images