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Grounding monitoring method and system for metal sheath of high voltage cable

A technology for high-voltage cables and metal sheaths, applied in the field of grounding monitoring methods and systems for metal sheaths of high-voltage cables, can solve problems such as abnormal monitoring and analysis of ungrounded currents, achieve economic cost savings, solve high false alarm rates, and install and apply convenient effect

Active Publication Date: 2020-02-28
XUJI GRP +2
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Problems solved by technology

[0004] The purpose of the present invention is to provide a method and system for monitoring the grounding of the metal sheath of a high-voltage cable, which is used to solve the problem in the prior art that the abnormal situation of the sheath grounding current of the metal sheath of the high-voltage cable is not monitored and analyzed

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  • Grounding monitoring method and system for metal sheath of high voltage cable

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Embodiment Construction

[0019] The specific embodiment of the present invention will be further described below in conjunction with accompanying drawing:

[0020] The invention provides a high-voltage cable metal sheath grounding monitoring system, which includes a sheath grounding current acquisition device, an operating current acquisition device, and a monitoring unit. Both the sheath grounding current acquisition device and the operating current acquisition device are connected to the monitoring unit. The grounding current collection device is used to collect the sheath grounding current of the metal sheath of the high-voltage cable, and the running current collection device is used to collect the running current of the high-voltage cable metal sheath, and sends the collected sheath grounding current and running current to the monitoring unit; The monitoring unit is used to give an alarm when the running current of any one of the phases is input, and the running current of this phase is greater th...

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Abstract

The invention provides a grounding monitoring method and system for a metal sheath of a high voltage cable. Different phases of grounding and operation currents of the metal sheath of the high voltagecable are collected, and whether alarm is raised is determined according to the grounding and operation currents of the metal sheath. Online dynamic monitoring is realized, the trend of the cable fault can be predicted, installation and application of the grounding current online monitoring system is more convenient, and the cost is reduced; a more efficient and reliable grounding current monitoring method is provided for power supply departments, operation of the cable line is more reliable, and the operation and maintenance efficiency is improved; and the problems of high false alarm rate and low reliability of grounding current monitoring for metal sheath of the high voltage cable are solved.

Description

technical field [0001] The invention belongs to the technical field of online monitoring of high-voltage cables, and in particular relates to a method and system for monitoring the grounding of a metal sheath of a high-voltage cable. Background technique [0002] At present, with the continuous development of my country's national economy and the continuous advancement of urbanization, power cables have been widely used due to their advantages of getting rid of the restrictions of overhead corridors, saving urban land, and high reliability of power supply. The rapid growth of high-voltage cables and cable tunnels makes power supply companies face enormous pressure in the operation and maintenance of high-voltage cables and cable tunnels. On the one hand, the rapid increase of cable lines and cable tunnels; on the other hand, the supplement of cable operation and maintenance personnel has not kept up in time. At the same time, the management of high-voltage cables and cable ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R19/165G01R31/52G08B13/22
CPCG01R19/16547G08B13/22
Inventor 曾国辉路光辉周水斌雍明超王伟杰梁武民牧继清李英明龚东武兰五胜毛丽娜杨增荣陈磊郭旭
Owner XUJI GRP
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