Pressure-equalizing deep suppression power frequency freewheeling arc lightning protection gap device

Abstract

The invention discloses a voltage-sharing type lightning-protection clearance device capable of deeply restraining power frequency, follow current and electric arcs. The voltage-sharing type lightning-protection clearance device capable of deeply restraining the power frequency, the follow current and the electric arcs comprises a grounding side arc extinguishing device, and a grounding side fitting (2) and a wire side fitting (14) which are arranged on two ends of a circuit insulator chain (1) in parallel through fixing devices. The grounding side arc extinguishing device and a wire side arc extinguishing device are respectively arranged on the other ends of the grounding side fitting (2) and the wire side fitting (14). A connection slim tube (3) is arranged on the other end of the grounding side fitting (2). One end of a non-metallic material grounding electrode (12) of the grounding side arc extinguishing device is connected with the connection slim tube (3) on the grounding side fitting (2) in an inlaid mode through a Z-shaped connection fitting (4), and the other end of the non-metallic material grounding electrode (12) is connected with a signal collecting device (11). Grading rings of the device can attract lightning current so that almost 100% of electric arcs enter into arc extinguishing cavities. When the device disruptively discharges, air-producing material inside a constraining space is rapidly heated by high-temperature electric arcs to produce high-voltage air, the signal collecting device collects signals automatically and starts a gas injection generating device at the same time, high-speed airflow is generated instantly to impact, cool and extinguish the electric arcs along the lengthways direction, and thus the stability of a power system is improved. The Z-shaped connection fitting (4) is arranged so that the arc extinguishing devices can be replaced conveniently, maintenance cost of a power grid is reduced and operation efficiency is improved.

Description

technical field [0001] The invention relates to a gas arc extinguishing lightning protection device, in particular to a pressure-equalizing type deep-suppressing power-frequency freewheeling arc lightning protection gap device. 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 protection gaps or line arresters on the ...

AI Technical Summary

Problems solved by technology

These patents have achieved a good solution to the above problems, but there are still certain defects, such as the inability to introduce the arc into the arc extinguishing chamber 100%, and the connection and replacement of the arc extinguishing device is inconvenient. Further improvement is needed to achieve better arc extinguishing effect and improve the stability of power system

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