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Distribution network line ground potential inspection device and method

A technology for checking devices and ground potential, applied in the direction of measuring devices, fault locations, measuring electricity, etc., can solve problems such as the lack of effective technical means, and achieve the effects of preventing large-scale power outages, shortening line inspection time, and quickly detecting and locating

Inactive Publication Date: 2020-04-17
STATE GRID BEIJING ELECTRIC POWER +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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

Method used

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  • Distribution network line ground potential inspection device and method
  • Distribution network line ground potential inspection device and method
  • Distribution network line ground potential inspection device and method

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Embodiment approach

[0036] Such as figure 1 As shown, a distribution network line ground potential inspection device includes a microprocessor unit 01, and a voltage unit and a current sampling unit respectively connected to the microprocessing unit 01; the voltage unit includes a power management circuit 05, the The output terminal of the power management circuit 05 is connected to the input terminal of the switching DC boost circuit 06, the output terminal of the switching DC boost circuit 06 is connected to the input terminal of the full-bridge inverter circuit 08, and the output terminal of the full-bridge inverter circuit 08 is connected to the LC filter circuit The input end of 07; the output end of the LC filter circuit 07 is divided into two paths, one path is connected to the input end of the voltage transformer 04, and the other path of the output end of the LC filter circuit 07 passes through the voltage sampling circuit 09 and the microprocessor unit 01 connected. The output terminal...

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/08G01R31/52G01R19/02
CPCG01R19/02G01R31/086G01R31/088
Inventor 李静波王进朔谭久俞姜杏辉郭玉婷宋鑫李刚
Owner STATE GRID BEIJING ELECTRIC POWER
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