Fault monitoring method for high-voltage cable

Abstract

The invention discloses a fault monitoring method for a high-voltage cable. In the method, a high-voltage cable fault monitoring device is adopted for monitoring current and temperature information of each phase at the two ends of a high-voltage power cable, the measured data are transmitted into a background monitor, and a background makes an abnormal running alarm. The device consists of a cable (7) head end current measuring device, a head end temperature sensor device, a remote terminal (1), a tail end current measuring device, a tail end temperature sensor device (2), a power supply and a background system (6), wherein the head end current measuring device, the head end temperature sensor and the remote terminal are arranged at the head end of the cable; the tail end current measuring device and the tail end temperature sensor are arranged at the tail end of the cable; data measured by the current measuring devices and the temperature sensor devices are transmitted to the background monitor in a GPRS (General Packet Radio Service) communication way (4) through the remote terminal. The device is simple in structure, and the fault of the cable can be judged by only monitoring the current changes and temperature changes at the head end and the tail end of the cable. The fault monitoring method is suitable for fault monitoring of the high-voltage cable.

Description

[0001] technical field [0002] The invention relates to a high-voltage cable fault monitoring method, which belongs to the technical field of cable fault monitoring. Background technique [0003] At present, with the development of urbanization, urban power cables are more and more widely used. Most of the cables are installed and operated underground and in cable trenches, and the operating conditions are basically unknown. When the cables are overloaded and run at high temperature, they cannot be understood, so cable failures will occur, and external forces will damage the cables (excavators, artificial trenches). Emergency repairs Personnel cannot rush to the scene in time, and can only be discovered through inspections along the way, which delays the repair time. Most of the lines in urban areas are mixed cable lines and overhead lines. When a line fails, it is difficult to judge whether it is an overhead line fault or a cable line fault, which brings great difficul...

AI Technical Summary

Problems solved by technology

Most of the cables are installed and operated underground and in cable trenches, and the operating conditions are basically unknown. When the cables are overloaded and run at high temperature, they cannot be understood, so cable failures will occur, and external forces will damage the cables (excavators, artificial trenches). Emergency repairs Personnel cannot rush to the scene in time, and can only be discovered through inspection along the way, which delays the repair time

Most of the lines in urban areas are mixed cable lines and overhead lines. When a line fails, it is difficult to judge whether it is an overhead line fault or a cable line fault, which brings great difficulties to the operation and maintenance personnel to find the fault.

After the fault of the cable line is found, the cause cannot be quickly identified, which seriously affects the speed of cable maintenance and reduces the reliability of power supply

Images