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10-35kv overhead transmission line constraint space injection gas arc extinguishing lightning protection gap apparatus

An overhead transmission line and gas injection technology, applied in circuits, electrical components, insulators, etc., can solve the problems of frequent replacement, short service life, large leakage current, etc., to avoid line tripping, improve power supply reliability, and protect power equipment. Effect

Active Publication Date: 2012-10-17
云南电力试验研究院(集团)有限公司
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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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  • 10-35kv overhead transmission line constraint space injection gas arc extinguishing lightning protection gap apparatus
  • 10-35kv overhead transmission line constraint space injection gas arc extinguishing lightning protection gap apparatus

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Embodiment Construction

[0011] The following describes in detail the implementation of the arc extinguishing and lightning protection gap of the 10-35kV overhead transmission line of the present invention by jetting gas in the confined space with reference to the accompanying drawings.

[0012] figure 1 It is a structural diagram of the present invention. This 10-35kV overhead transmission line constrained space sprays gas arc extinguishing lightning protection gap device, the device includes: grounding side electrode fixing device (1), grounding side electrode (2), arc extinguishing gap fixing Device (3), arc extinguishing gap short electrode (4), signal acquisition device (5), insulated and sealed casing (6), gas generating device (7), hydrophobic skirt (8), arc extinguishing gap gas jet ( 9), the main discharge gap (10, the wire side electrode (11), the wire side electrode fixing device (12), the embedded iron block (13), the strong magnet (14) and the gas generating device switching metal sheet (...

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Abstract

The invention relates to a lightning protection and especially relates to a 10-35kV overhead transmission line constraint space injection gas arc extinguishing lightning protection gap apparatus which is suitable for a 10-35kV overhead transmission line. The apparatus is installed in parallel on two ends of a line insulator string to protect a flash-over voltage between gaps to be less than the voltage of a protected insulator string so that the apparatus is punctured prior to the protected insulator string when the power transmission line is suffered from lightning stroke. During disruptive discharging, a signal acquisition device automatically senses a lightning current signal and triggers a high speed injection gas generation apparatus. A high speed injection air flow is instantly generated so as to carry out great impact on a follow current arc in a constraint space along a vertical direction, and carry out cooling till the arc is quenched. According to the invention, a structure is simple, installation and maintenance are convenient. Through using the apparatus of the invention, when the line is suffered from the lightning stroke, a lightning current can be rapidly led to the ground and simultaneously a high speed airflow quenching power frequency follow current is generated so that electric equipment can be effectively protected and power supply reliability is increased.

Description

technical field [0001] The invention relates to a lightning protection device, in particular to a 10-35kV overhead transmission line constrained space spray gas arc extinguishing lightning protection gap device for 10-35kV overhead transmission lines. 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 o...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01B17/46H01B17/48
Inventor 王巨丰王嬿蕾
Owner 云南电力试验研究院(集团)有限公司
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