Device for online monitoring of grounding loop current of urban cable line

Abstract

The invention belongs to the technical field of cable online monitoring, and especially relates to a device for the online monitoring of a grounding loop current of an urban cable line. The device is high in efficiency, is convenient for power supply and is stable in operation. The device comprises a current collection module, a signal analysis and processing module, a wireless communication module, and a power module. The structural main points of the device are that a cable grounding current signal is connected with a current collection module; the current collection module is connected with the signal analysis and processing module; the signal analysis and processing module is connected with the wireless communication module; the power module supplies power to the current collection module, the signal analysis and processing module and the wireless communication module; the current collection module comprises an A-phase current collection circuit, a B-phase current collection circuit, a C-phase current collection circuit, an N-phase current collection circuit, and an analog-digital converter.

Description

technical field [0001] The invention belongs to the technical field of cable on-line monitoring, in particular to an on-line monitoring device for grounding circulation of urban cable lines. Background technique [0002] With the rapid development of the national economy, power cables are used more and more widely. In some larger cities, high-voltage cables are laid on a large scale in underground cable tunnels, shouldering the task of urban power transmission. However, in the actual application process, the failure rate of high-voltage cables is always high. In order to solve this problem and ensure the safe and stable operation of the cables, the State Grid Corporation requires a monthly measurement of the ground loop current of the cables. Since urban cables are mostly laid in underground cable tunnels, and the laying distance is long and there are many grounding points, the measurement work is extremely hard and cumbersome, which brings a huge burden to the inspection un...

AI Technical Summary

Problems solved by technology

However, in the actual application process, the failure rate of high-voltage cables is always high. In order to solve this problem and ensure the safe and stable operation of the cables, the State Grid Corporation of China requires a monthly measurement of the ground loop current of the cables

Since urban cables are mostly laid in underground cable tunnels, and the laying distance is long and there are many grounding points, the measurement work is extremely hard and cumbersome, which brings a huge burden to the inspection unit

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