Semi-closed double-jet-airflow arc extinguishing lightning protection device without air gap and application thereof

Abstract

The invention discloses an air-gap-free semi-closed double-jet-airflow arc extinguishing lightning protection device and application thereof. The device mainly comprises an arc extinguishing body andan airflow jet assembly, wherein the interior of the arc extinguishing body is of a hollow structure, a partition plate is longitudinally arranged in the middle of the interior of the arc extinguishing body, and divides the internal space of the arc extinguishing body into two sets of airflow jet channels, the upper end of the airflow jet channel on the left side is fixedly provided with an airflow jet assembly, the lower end is an airflow nozzle extending towards the side surface of the arc extinguishing body, the upper end of the airflow jet channel at the right side is an airflow nozzle extending towards the side surface of the arc extinguishing body, and the lower end is fixedly provided with an airflow jet assembly. The device can restrain and control the arc path, eliminates the harmof arc drift, is wide in application range, is installed at a time, can be repeatedly used for a long time, is low in operation cost, is high in sensitivity, and facilitates the safe production of electric power.

Description

technical field [0001] The invention belongs to a lightning protection device for power transmission and distribution overhead lines, and relates to a semi-closed double-jet airflow arc-extinguishing lightning protection device without an air gap and its application. Background technique [0002] At present, lightning strike accidents are frequent in areas such as overhead transmission and distribution lines, substations, and power plants. The accidents caused by lightning strikes have brought great challenges to the safe, stable and reliable operation of the power system, and have also brought great challenges to the country's economic development and people's living standards. have a huge impact. How to carry out effective arc extinguishing and lightning protection to improve the safety, stability and reliability of the power system has always been the key research content of the power sector. The existing arc extinguishing and lightning protection methods are mainly throu...

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Problems solved by technology

[0002] At present, lightning strike accidents are frequent in areas such as overhead transmission and distribution lines, substations, and power plants. The accidents caused by lightning strikes have brought great challenges to the safe, stable and reliable operation of the power system, and have also brought great challenges to the country's economic development and people's living standards. have a huge impact

How to carry out effective arc extinguishing and lightning protection to improve the safety, stability and reliability of the power system has always been the key research content of the power sector. The existing arc extinguishing and lightning protection methods are mainly through the installation of arc extinguishing and lightning protection in the power system lines However, considering the requirements of lightning protection device technology: safety, effectiveness, durability, economy, and maintenance, it is found that it is difficult to achieve one step at the technical level of the existing lightning protection device. in place

[0003] In this regard, the applicant and related inventors conducted a lot of research on the technical requirements of lightning protection devices, and found that the existing lightning protection devices still have the following problems: ① The arc extinguishing effect is not good, the condensation electrode effect is generated when the arc passes through, and the low temperature arc is baked. Baking the gas-producing material makes the gas-generating effect not good, and the contradiction between the condensation electrode effect and the high-temperature baking gas-producing arc extinguishing makes the arc-extinguishing effect not good; ②The arc-extinguishing sensitivity is not high, and the arc-extinguishing effect is not good when a small arc passes through Good, only when a large arc passes through the multi-chamber can it operate correctly, and the large arc flow will cause the relay protection to operate and there will be a trip accident, so the sensitivity of multi-chamber arc extinguishing is not ideal; ③The durability is not high, and the gas-producing material It needs to be baked to produce gas under high temperature conditions, and the gas-producing materials in the arc extinguishing device are consumed under high temperature conditions, resulting in poor durability; ④ Affected by the operation mode, there is a blind area of ​​arc extinguishing, which makes the effect of arc extinguishing and lightning protection poor good

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