Distribution network line ground potential inspection device and method

Abstract

The invention discloses a distribution network line ground potential checking device and method. The device comprises a microprocessor unit, a voltage unit and a current sampling unit, wherein the voltage unit and the current sampling unit are connected with the microprocessor unit. According to the method, multiple sampling tests are carried out through a sweep frequency method, whether a grounding wire exists or not is judged by judging the magnitude of current through a threshold judgment method, and a distance between a measurement point and a grounding point is calculated through an impedance method. The device is advantaged in that a grounding state of a distribution network line is confirmed from the detection technology, the hidden danger of malignant accidents caused by human factors is eliminated, reliable guarantee is provided for safe operation of power equipment and personnel safety, large-scale high-cost rectification is not needed, cost is low, a large amount of manpowerand material resources can be saved, and high economic benefits are achieved; the method can achieve quick detection and positioning, facilitates quick searching and disassembly of a grounding wire for a maintainer, shortens the line patrol time, improves maintenance efficiency of a line, and effectively prevents large-area power failure caused by a grounding accident.

Description

technical field [0001] The invention belongs to the technical field of electric power maintenance equipment, and in particular relates to a device and method for checking the ground potential of a distribution network line. Background technique [0002] The power grounding wire is a safety tool commonly used by power companies in construction (overhaul). It is flexible and convenient to use on site, also called portable power grounding wire. [0003] In the actual maintenance process, the installation and dismantling of the power grounding wire is relatively frequent. In the process of large-scale power outage operations, there are more than a dozen or even dozens of grounding wires used, and the number of grounding wires used is relatively large and the locations are scattered. As a result, the operator may miss the power grounding wire in the process of removing the grounding wire, resulting in a closing accident with the grounding wire and causing heavy losses to the po...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a distribution network line ground potential inspection device and method to solve the problems in the prior art, mainly relying on the operation ticket system and the degree of execution of the operating procedures by the on-site operators, and lack of effective technical means. Technical Issues for Confirmation and Inspection of Grounding Status

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