Miniaturized GIS tank-type metal-oxide lightning arrester and implementation method thereof

Abstract

The invention relates to the technical field of lightning arresters, in particular to a miniaturized GIS tank-type metal-oxide lightning arrester. The miniaturized GIS tank-type metal-oxide lightningarrester comprises a disc spacer, a conductive rod, a tank body, a voltage-grading shielding cover and a zinc oxide varistor core, wherein the disc spacer is fixedly connected to the top of the tank body through a fixing assembly; the tank body is filled with a sulfur hexafluoride gas; the conductive rod, the voltage-grading shielding cover and the zinc oxide varistor core all are arranged in thetank body; one end of the conductive rod is connected to the bottom of the disc spacer; and the other end of the conductive rod is connected to the zinc oxide varistor core through the voltage-gradingshielding cover. By adopting the structure arrangement, the lightning arrester adopts high-gradient zinc oxide varistors, so that the electric performance is ensured, and meanwhile, the utilization number of the zinc oxide varistors is reduced. The zinc oxide varistor core is formed by connecting three zinc oxide varistor groups and a helical structure in series, so that the overall height of thelightning arrester is reduced, the structure is more compact and the floor area of equipment is effectively reduced. Meanwhile, the invention further discloses an implementation method of the lightning arrester.

Description

Technical field [0001] The invention relates to the technical field of lightning arresters, in particular to a miniaturized GIS tank type metal oxide arrester. Background technique [0002] With the development of social economy and the improvement of people's living standards, the importance of power supply reliability of power stations and substations has become increasingly prominent. At the same time, the advancement of urbanization has caused an increase in investment in land acquisition for power transmission and distribution equipment near urban areas. GIS has the advantages of small footprint, all components sealed against environmental interference, high operational reliability, long overhaul period, small maintenance workload, and no electromagnetic interference. In recent years, it has been widely used in 110kV and above substations. [0003] With the continuous improvement of GIS and the needs of power system development, GIS is developing in the direction of high volt...

AI Technical Summary

Problems solved by technology

Zinc oxide resistors are the core components of GIS tank-type metal oxide arresters. The voltage gradient of zinc oxide resistors commonly used in GIS tank-type metal oxide arresters is about 300V / mm. If used in GIS tanks with high voltage levels of 500kV and above Type metal oxide arrester will increase its radial and axial geometric dimensions, making the height, volume and weight of GIS tank type metal oxide arrester greatly increase

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