VFTO suppression device and GIS device

Abstract

The invention relates to the technical field of electric equipment, in particular to a VFTO suppression device and a GIS device using the VFTO suppression device. The VFTO suppression device comprisesa conductive rod, wherein a magnetic ring string group is arranged on the outer peripheral surface of the conductive rod in a sleeved mode; the outer peripheral surface of the magnetic ring string group is sleeved with a resistance cylinder, and two ends of the resistance cylinder are provided with extending parts which exceed the magnetic ring string group in the length direction of the conductive rod respectively; an annular cavity is formed between the extending parts and the conductive rod; a jackscrew for fixing the resistance cylinder on the conducive rod is arranged on the extending parts in a penetrating mode; and the jackscrew penetrates through the annular cavity to be in contact with the conductive rod to realize conduction of the resistance cylinder and the conductive rod, andthe jackscrew is made of a conductive material. According to the VFTO suppression device, the problem that in the prior art, the processing and assembling of the conductive rod and the resistor is complex can be solved.

Description

technical field [0001] The invention relates to the technical field of power equipment, in particular to a VFTO suppression device and GIS equipment. Background technique [0002] Every operation of the disconnector in the gas-insulated metal-enclosed switchgear (GIS) has dozens or even hundreds of re-ignitions, the voltage at both ends of the contact gap suddenly drops within a few ns, and the voltage steep wave in the GIS Traveling waves are continuously generated, complex refraction, reflection and superposition occur, and ultra-fast transient overvoltage (hereinafter referred to as VFTO) is generated. VFTO is a special overvoltage, which has three main characteristics: first, the frequency bandwidth (from zero to hundreds of MHz); second, the steepness (the rise time can be as low as several ns); third, the amplitude is high (can be up to 3p.u.). [0003] VFTO has an important impact on the safe operation of GIS equipment, external connection equipment and secondary eq...

AI Technical Summary

Problems solved by technology

[0015] The purpose of the present invention is to provide a VFTO suppression device, which can solve the problem of complex processing and assembly of conductive rods and resistors in the prior art; another purpose of the present invention is to provide a GIS equipment using the VFTO suppression device, which can suppress VFTO for increased safety

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