Air-gap-free semi-closed backflushing comprehensive arc extinguishing lightning arrester without air gap

Abstract

The invention discloses an air-gap-free semi-closed backflushing comprehensive arc extinguishing lightning arrester, which comprises a lightning arrester main body, wherein the upper end and the lowerend of the lightning arrester main body are installed at the two ends of an insulator string through connecting fittings respectively to form reliable electric connection, the lightning arrester mainbody is hollow, an insulating partition plate is arranged in the longitudinal direction of the lightning arrester main body so as to form two independent arc extinguishing cavities in the lightning arrester main body, a backflushing device is arranged in the upper end of the left arc extinguishing cavity, a backflushing opening is formed in the lower end, an upper electrode is arranged at the topend of the backflushing device, an airflow jetting device is arranged in the lower end of the arc extinguishing cavity on the right side, an airflow nozzle extending towards the outer side surface isformed in the upper end, a lower electrode is arranged at the bottom of the airflow jetting device, and a wall electrode is arranged on the insulating partition plate. The lightning arrester can effectively prevent the flashover problem of the insulator, reduces the lightning trip-out rate of power equipment, protects power facilities, improves the reliability of a power grid, and facilitates thesafe production of power.

Description

technical field [0001] The invention belongs to a lightning arrester for power transmission and distribution overhead lines, and relates to a semi-closed recoil comprehensive arc-extinguishing lightning arrester without an air gap. Background technique [0002] Lightning strikes will bring different forms of damage and damage to power facilities. Thundercloud discharge will cause lightning overvoltage in the power system. Common overvoltages in overhead lines include lightning strikes near the overhead line through electromagnetic induction on the transmission line. Voltage and lightning strike directly on the wire to generate overvoltage. Lightning strikes cause overvoltage, which may cause damage to insulators and transmission lines; lightning strikes cause flashover discharges on insulators, which will cause burns and fall off on the porcelain surface or cause network cracks on glass insulators, greatly reducing the insulation strength; lightning strikes on transmission l...

AI Technical Summary

Problems solved by technology

[0004] The applicant and related inventors found the following problems in the existing lightning protection device during the continuous research process: 1) The arc extinguishing ability is not strong, and the arc extinguishing energy of the arc extinguishing device always affects the flashover arc energy; 2) The arc extinguishing sensitivity is not high , there is a problem that the arc extinguishing device does not operate under low temperature arc conditions; 3) The durability is not good, most arc extinguishing devices need gas-generating materials to provide arc extinguishing conditions, and there is unnecessary consumption in extreme environments; 4) It is affected by the operation mode The effect of arc extinguishing and lightning protection is not good

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