Jet stream arc extinguishing and lightning protection gap device in constraint space

Abstract

The invention relates to a lightning protection device, in particular to a jet stream arc extinguishing and lightning protection gap device in a constraint space of transmission lines with various voltage levels. The device is installed on the two ends of a circuit insulator chain in parallel to ensure that the flash over voltage between gaps is smaller than that of the protected insulator chain, so as to be punctured prior to the protected insulator chain when the transmission lines are subjected to lightning stroke, a gas generation material in the constraint space is severely heated by high temperature electric arcs to generate high pressure gas in the case of disruptive discharge, and meanwhile, a signal collecting device automatically collects a signal and starts a jet gas generating device to instantaneously generate high speed gas flow so as to impact, cool and extinguish the electric arcs along the longitudinal direction. The device disclosed by the invention is simple in structure and convenient in installation, and the device can quickly discharge the lightning current to the ground and simultaneously generate high speed gas flow to extinguish the power-flow current when the transmission lines are subjected to lightening shock, so that the power equipment is effectively protected and the power supply reliability is improved.

Description

technical field [0001] The invention relates to a lightning protection device, in particular to a lightning protection gap device for jetting arc extinguishing and lightning protection in a confined space for power transmission lines of various voltage levels. Background technique [0002] Lightning protection of transmission lines has always been an important part of the lightning protection work of the power sector, and lightning faults are still one of the important factors affecting the safety of the power grid. The impact flashover caused by lightning strike on the transmission line will cause the line insulator to flash over, and then generate a large power frequency continuous current, damage the insulator string and fittings, and cause a line accident. The traditional "blocking" lightning protection method cannot fundamentally solve the lightning strike problem due to its limitations. Therefore, the power sector generally adopts the installation of parallel protecti...

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Problems solved by technology

[0004] Secondly, the line arrester is expensive, the use and maintenance costs are high, the leakage current is large, the service life is short, and the replacement is frequent, and the zinc oxide module used in the line arrester has obvious skin effect under lightning impact, and it is easy to explode under high current. Cause long-term failure of the line, which is not conducive to the economical, safe and stable operation of the power grid

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