Multi-chamber-based circuit lightning protection device

Abstract

The invention discloses a multi-chamber-based circuit lightning protection device. The device comprises an installation tool and a multi-chamber arc-extinguishing lightning protection body connected with the bottom of an insulator of a protected circuit; one end of a penetrated clip electrode is connected to the protected circuit; a series main gap is disposed between the other end of the penetrated clip electrode and the multi-chamber arc-extinguishing lightning protection body; an overvoltage produced by lightning strike generates a large electric arc between the conductor and the line and is discharged by two adjacent small electric arc chambers; the high-voltage gas generated during the electric arc release process blows the small electric arc into the air, thereby extinguishing the electric arc. The maximum arc extinguishing time is less than 10MS, the operating voltage is high, and the lightning discharge capability is strong; and meanwhile when the lightning directly strikes onthe circuit, the circuit does not burst due to excessive lightning current. The device is simple in structure, does not need to be grounded and has self-cleaning performance, so the installation is simple and the maintenance is not needed, and the construction and installation cost and long-term operation and maintenance cost of the power supply company can be greatly reduced.

Description

technical field [0001] The invention belongs to a high-voltage line lightning protection device, in particular to a multi-chamber line lightning protection device. Background technique [0002] Distribution network is the link connecting power supply enterprises and users, and plays a vital role in the entire power system. In order to improve the safety and reliability of distribution lines, my country is gradually converting the traditional overhead bare wires of 10kV distribution lines into overhead insulated wires in the process of urbanization. Lightning is an important reason that threatens the safety and reliability of distribution lines, especially distribution lines with overhead insulated conductors. When a flashover is triggered by a lightning strike, the arc continues to discharge at a fixed point, releasing a large amount of heat, which can easily cause the line insulation to burn out, and even the lightning strike to break the line. [0003] When the lightning...

AI Technical Summary

Problems solved by technology

Including extending the flashover path, partially stripping insulated wires, using parallel protection gaps (commonly known as arcing angles), etc., commonly used zinc oxide arresters, zinc oxide arresters have complex structures, require grounding design, and require regular inspection and replacement.

Therefore, the construction and installation are inconvenient, and the requirements for operation and maintenance are relatively high. Due to the aging of zinc oxide components, the arrester failure problem is prone to occur. Currently, the lightning protection measures for distribution lines need to be installed in each circuit. The zinc oxide arrester has a complex structure and requires Grounded design and requires periodic inspection and replacement

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