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High-frequency magnet ring device for restraining very fast transient overvoltage

A technology of transient overvoltage and magnetic ring, which is applied in the direction of emergency protection circuit devices, circuit devices, emergency protection circuit devices, etc. for limiting overcurrent/overvoltage, and can solve the problems of high cost, low reliability, complex structure, etc. question

Inactive Publication Date: 2013-08-07
TSINGHUA UNIV +3
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  • Abstract
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Problems solved by technology

[0004] The purpose of the present invention is to provide a high-frequency magnetic ring device for suppressing ultra-fast transient overvoltage, so as to solve the disadvantages of complex structure, high cost and low reliability of VFTO suppression in the prior art

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  • High-frequency magnet ring device for restraining very fast transient overvoltage

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Embodiment Construction

[0018] It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and examples.

[0019] The present invention provides an embodiment of a high-frequency magnetic ring device for suppressing ultra-fast transient overvoltage. For details, see figure 1 , the high-frequency magnetic ring device of this embodiment is fixed on the central conductor 10 of the fully enclosed combined electrical appliance, the high-frequency magnetic ring device includes an insulating sleeve 20, a plurality of magnetic ring groups 30 and an insulating member 40, and the insulating sleeve 20 is sleeved On the central conductor 10 , a plurality of magnetic ring groups 30 are arranged side by side on the outer wall of the insulating sleeve 20 , and the insulator 40 is arranged between two adjacent magn...

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Abstract

The invention provides a high-frequency magnet ring device for restraining very fast transient overvoltage (VFTO). The high-frequency magnet ring device is fixed on a center conductor of a gas insulated switchgear, and comprises an insulating sleeve, a plurality of magnet ring groups and insulating pieces. The insulating sleeve is sleeved on the center conductor, the magnet ring groups are parallelly sleeved on the outer wall of the insulating sleeve, and the insulating pieces are arranged between every two adjacent magnet ring groups. With the high-frequency magnet ring device, the defects of complicated structure, high production cost and low reliability of a VFTO restraining method in the prior art are effectively overcome.

Description

technical field [0001] The invention specifically relates to a high-frequency magnetic ring device for suppressing ultra-fast transient overvoltage. Background technique [0002] During the operation of the isolating switch in the fully enclosed combined electrical appliance (Gas Insulate Switchgear, referred to as GIS) in line with the no-load short busbar, due to the multiple breakdowns between the contacts of the isolating switch and the propagation, reflection and superposition of traveling waves inside the GIS , will produce very fast transient overvoltage (Very Fast Transient Overvoltage, referred to as VFTO). The oscillation frequency of VFTO can be as high as hundreds of megahertz, the wave head rise time can be as short as a few nanoseconds, and the oscillation amplitude can theoretically reach up to 3pu. With the continuous improvement of the voltage level of my country's power grid, the threat of VFTO to the insulation of primary power equipment (especially windi...

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Application Information

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IPC IPC(8): H02H9/04
Inventor 刘卫东陈维江关永刚戴敏岳功昌李心一穆双录
Owner TSINGHUA UNIV
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