Composite insulated lightning protection wall bushing for power system

Abstract

The invention relates to the technical field of power system equipment manufacturing, and particularly relates to a composite insulated lightning protection wall bushing for a power system. The composite insulated lightning protection wall bushing comprises an insulating pipe body, wherein a conductive body is arranged inside the insulating pipe body, a fixed flange is arranged in the middle of the insulating pipe body, a metal oxide valve plate group sleeves outside the part of the insulating pipe body located at the outdoor end, one end part of the metal oxide valve plate group is connectedwith an outdoor connecting bolt and an outdoor conducting rod, the other end part of the metal oxide valve plate group is connected with the fixed flange, and a silicone rubber sheathed umbrella skirtis arranged on the outermost side of the insulating pipe body. According to the scheme of the invention, the insulation performance of a conventional wall bushing and the lightning protection performance of a metal oxide arrester are integrated, the own insulation level of insulating bushings can be improved, a good lightning protection effect can also be realized, the problem that indoor equipment is damaged as the lightning over-voltage invades to a power substation or a power distribution room along overhead lines during lightning strikes can be avoided, and the power supply reliability can be beneficially improved.

Description

technical field [0001] The invention relates to the technical field of power system equipment manufacturing, in particular to a composite insulation lightning protection wall bushing for power systems. Background technique [0002] In recent years, due to the rapid development of local economy and urban construction, social electricity consumption has increased significantly, and the number of indoor substations or power distribution rooms in operation and new construction is increasing. Its safe and reliable operation is very important, which directly affects the power supply. However, lightning overvoltage invades substations or power distribution rooms along overhead distribution lines (including 10 kV, 35 kV and 400 volt lines), causing equipment insulation accidents from time to time, and overvoltage breakdown equipment. , causing power outages on power supply lines and busbars, not only causing economic losses due to equipment replacement, but also seriously affecting ...

AI Technical Summary

Problems solved by technology

However, until now, in order to prevent the intrusion of lightning overvoltage waves, conventional wall bushings and arresters can only be installed separately and independently, which not only increases the application of supporting materials, requires high construction technology, but also increases the residual lightning impact of indoor equipment. voltage level

At present, the conventional measures are only to install the metal oxide arrester in the indoor switch cabinet or on the metal bracket specially set up on the incoming line side. There are still accidents of power supply interruption caused by equipment damage caused by lightning strikes in substations or power distribution rooms. Occurs, it is urgent to take technical measures to improve the protection ability of overhead line lightning wave intrusion

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