A high-voltage cable straight-through joint structure

Abstract

The invention discloses a high-voltage cable straight-through joint structure, comprising: a VHF partial discharge sensing device which can be fitted and fastened on a first protective sleeve or a second protective sleeve; the VHF partial discharge sensing device comprises an insulating ring; a first protective sleeve and a second protective sleeve; the VHF partial discharge sensing device comprises an insulating ring. A VHF partial discharge sensor is arranged inside the insulating ring and connected with the insulating ring, and the terminal of the VHF partial discharge sensor is exposed tothe outside of the insulating ring. A stopper capable of fixing the insulating ring together with the terminal stopper on the mounting position area; A VHF partial discharge sensing device is assembled on the first protective sleeve or the second protective sleeve through a limiting piece, and the first protective sleeve and the second protective sleeve are assembled and butted, and the terminal post is connected on the adapter assembly for signal external connection. The high-voltage cable straight-through joint structure of the invention can solve the problem that the VHF partial discharge signal can not be detected due to long-distance propagation attenuation, and the internal defects of the high-voltage cable insulation joint can not be found in time; Structural layout is more compact,and repairing, maintenance and cost control are facilitated.

Description

technical field [0001] The invention relates to the field of electrical appliances, in particular to a high-voltage cable straight-through joint structure. Background technique [0002] In the prior art, the partial discharge parameter is one of the important indicators of the health status of the insulation joint of the high-voltage cable. [0003] When the VHF method is used for PD detection, due to the weak VHF PD signal, the signal propagation attenuation increases significantly with the increase of distance. At the same time, the internal PD signal of the high-voltage cable insulation joint is sent from the inside to the outside space. It needs to pass through the same network shielding layer and insulating material, and the signal strength is weakened; in addition, when the high-voltage cable insulation joint is laid in the trench, it is protected by sand filling and a protective cover. It is difficult to detect tiny VHF PD signals. For this reason, how to detect the...

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a high-voltage cable straight-through joint structure, which can solve the problem that the VHF partial discharge signal cannot be detected due to long-distance propagation attenuation, and the internal defects of the high-voltage cable insulation joint cannot be found in time; the structural arrangement More compact, conducive to maintenance, maintenance and cost control

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