Device for lowering lightning stroke trip-out rate of electric transmission line by utilizing coupling ground wire

Abstract

The invention discloses a device for lowering the lightning stroke trip-out rate of an electric transmission line by utilizing a coupling ground wire. The device comprises the coupling ground wire (1), wherein the coupling ground wire (1) is arranged below a cross arm of a lower lead wire (5), the coupling ground wire (1) is provided with a wire clamp (2), and the coupling ground wire (1) is connected with a principle material (3) through the wire clamp (2); anti-vibration whips (4) are sleeved on both ends of the coupling ground wire (1), and the installation distance of the anti-vibration whips (4) is a pre-twisted wire with a tail end outward of the wire clamp (2). By utilizing the current division and coupling action of the coupling ground wire, the lightning stroke overvoltage is reduced, and the lightning stroke trip-out rate of the electric transmission line is lowered.

Description

technical field [0001] The invention relates to a device for reducing the lightning tripping rate of a transmission line by using a coupling ground wire. Background technique [0002] In recent years, due to the increasing lightning activity, the accidents caused by lightning strikes on the line are increasing, which poses a serious threat to the safe operation of the line and seriously affects the power supply reliability of the transmission line. However, Xinghua is located in a water network area, and some lines have inconvenient traffic. Accident inspections and emergency repairs not only waste huge manpower and material resources, but also increase the labor intensity of operation and maintenance personnel. Therefore, the lightning protection of lines has become an operation and maintenance task. top priority. At present, the lightning protection measures of the transmission line itself mainly rely on the overhead ground wire erected on the top of the tower. The operat...

AI Technical Summary

Problems solved by technology

The line is located in an area prone to lightning strikes, and most of the surrounding areas are open areas. The iron tower is the tallest building in the surrounding area and is vulnerable to lightning strikes. The line is of standardized design, and the entire line is GJ-50 lightning protection line. The protection angle meets the design requirements and the grounding resistance measurement results are less than the design value, but still trip frequently, seriously affecting the safe and stable operation of the line

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