A Lightning Protection Installation Method for Overhead Transmission Lines in Medium and Heavy Ice Regions

Abstract

The invention discloses a lightning protection installation method for an overhead transmission line in a medium-heavy ice area, which belongs to the technical field of ice-coated ground wire treatment for power transmission lines, and is used to overcome the tripping accidents caused by the ice-coated ground wire in the prior art line. The statistical method obtains the geographical location of the overhead transmission line in the medium-heavy ice area and the icing situation of the overhead transmission line, removes the ground wire connected to the tower that is prone to ice coating, and couples the ground wire according to the grounding resistance of the tower after the ground wire is removed. For erection, if the grounding resistance of the tower after the ground wire is removed is higher than the set ground resistance threshold, a coupled ground wire is erected to reduce the ground resistance of the tower to below the set ground resistance threshold, and a lightning arrester is installed separately on the tower after the ground wire is removed, so that It can realize the rapid construction and construction of ice-coated ground wires of overhead transmission lines in medium-to-heavy ice areas, avoid the problem of increased tripping accidents caused by lightning strikes after the ground wires are removed, and can eliminate the influence of easy-to-ice-coated ground wires from the root cause without eliminating the need for icing , more efficient and convenient.

Description

technical field [0001] The invention belongs to the ice-covered ground wire treatment technology of transmission lines, and is aimed at the treatment of ice-covered ground wires of transmission lines in medium-to-heavy ice areas, and in particular relates to a lightning protection installation method for overhead transmission lines in medium-to-heavy ice areas. Background technique [0002] The transmission line is the main artery of the power system and the link connecting the power sources, substations and loads. Because of its large length, wide distribution, and vulnerable to lightning strikes, it is necessary to protect the transmission line from lightning strikes. At present, the lightning protection measures of the line itself mainly rely on the lightning protection line erected on the top of the tower, and its operation and maintenance work is mainly to detect and modify the grounding resistance of the tower. However, the erection of lightning protection lines has c...

AI Technical Summary

Problems solved by technology

However, the erection of lightning protection lines has caused unsafe operation of lines located in areas with severe rain, snow and freezing disasters: icing of transmission lines is a widely distributed natural phenomenon. Anti-icing ability, so that the power grid can operate better in the process of icing, has become a social issue of common concern, and it is urgent to carry out scientific research and actively formulate effective measures to prevent ice damage

[0003] Generally, two lightning protection lines are erected on overhead transmission lines to reduce lightning strike accidents on the line. Ice produces vibrations, etc., which cause the discharge of the conductor to the lightning conductor, causing frequent tripping accidents

When the overhead transmission line does not erect the lightning protection line in the medium-heavy ice area, the tripping accident of the transmission line caused by the icing of the lightning protection line will not occur, and the tripping rate of the transmission line due to the icing will be greatly reduced, but the lightning protection line The lack of lightning will lead to an increase in the failure rate of transmission lines. Therefore, how to scientifically and effectively lay ice-covered ground wires for transmission lines in heavy ice areas is very important for transmission lines.