Lightning protection device for contactless power transmission and distribution line

Abstract

The invention discloses a lightning protection device for a contactless power transmission and distribution line, which comprises a lightning arrester, a striking arc electrode and a connecting plate. The lower end of the lightning arrester is connected with the striking arc electrode through the connecting plate; the striking arc electrode adopts a stainless steel alloy casting and is arc-shaped, and the distance between the lower end of the striking arc electrode and a line conductor is kept between 80-130 MM to form a discharge gap. The upper end of the striking arc electrode is fixed on a cross arm by a connecting piece; and in a three-phase line, an A phase and a C phase share a cross arm, and a B phase independently uses a cross arm. The lightning protection device is simple in structure, has low cost, solves the problems that when in long-term charged operation, the lightning arrester is easy to age, is complicated to connect, is troublesome to install and maintain and needs regular preventive test, the influence surface caused by test blackout is large and the like. The invention has the beneficial effects that the lightning protection device is not connected with a live conductor; a grounding device is not required to be reinstalled; and the lightning protection device has the advantages of long service life, no maintenance, good lightning protection effect and the like and can be widely used in the power transmission and distribution line of 35KV and 10KV overhead naked conductors or insulated conductors. The lightning protection device is convenient, simple and reliable to install, is easy to promote and use and also can utilize a pole tower to naturally ground and discharge.

Description

technical field [0001] The invention relates to a lightning protection device for transmission and distribution lines, in particular to a non-contact lightning protection device used on 35KV and 10KV transmission and distribution lines. Background technique [0002] In the power grid, the 35KV line and the 10KV line are long and wide, and are directly related to industrial and agricultural production and the people's daily electricity consumption. They are the voltage level lines most closely related to users. Insulation flashover accidents may occur when the line is subjected to working voltage, operating overvoltage or atmospheric overvoltage during operation. In recent years, in order to control the occurrence of accidents, the electric power department has taken various measures to improve the insulation degree of the line, and the line can maintain a continuous and stable operating state under the normal working voltage. Due to the new technology and the wide applicati...

AI Technical Summary

Problems solved by technology

Therefore, there are inevitably various problems and defects: one is that the arrester is directly connected to the live wire, and the arrester will accelerate aging due to long-term electrified operation; The normal power supply of electric power companies wastes a lot of manpower and material resources, and seriously affects the normal production and life order of users; the third is that it is necessary to install grounding devices on the towers where lightning arresters are installed, which increases material investment and investment for power supply departments. The cost of compensation to occupy the place; Fourth, the upper and lower ends of the arrester must be wired, which is troublesome to install and maintain

Images