UHF signal lead-out device for equalizing shielding ring in basin type insulator

Abstract

The invention provides a voltage-sharing shielding ring hyper-frequency signal lead-out device in a basin-type insulator, which is used for leading out a hyper-frequency signal of a GIS (Gas Insulated Switchgear). The device comprises a conductive lead-out rod arranged inside a bolt mounting hole of the basin-type insulator to be electrically connected with a voltage-sharing shielding ring, insulated fixed sleeves sleeving on the outer side of the conductive lead-out rod to insulate the conductive lead-out rod from an outer casing and insulate the conductive lead-out rod from an outer conductor of a monitoring device, and metal conductive bands arranged on the outer surface of the insulated fixed sleeves and capable of being electrically connected with the outer casing. The invention is used in the fields of partial discharge monitoring and fault diagnosis, avoids the phenomena that the sensitivity of an external sensor of the GIS is poor and an internal sensor of the GIS affects the insulativity, and provides the signal lead-out device; the structures of all the components of the device are simpler, the assembly of the components and the operation of integrally mounting with the GIS are comparatively convenient and fast, and the purpose that the GIS is monitored more precisely, conveniently and quickly can be achieved.

Description

technical field [0001] The invention relates to the technical field of electrical equipment, and more specifically relates to a UHF signal lead-out device for a voltage equalizing shielding ring in a basin-type insulator. Background technique [0002] Gas-insulated combined electrical equipment, or GIS (abbreviation for Gas Insulated Switchgear in English), refers to gas-insulated metal-enclosed switchgear with SF6 as the insulating medium, also known as closed combined electrical equipment. It is to enclose most of the electrical equipment in the substation except the transformer, including circuit breakers, disconnectors, grounding (fast) switches, current transformers, voltage transformers, lightning arresters, busbars, etc., in a grounded metal shell. It is filled with SF6 gas with several atmospheric pressures as its insulation and arc extinguishing medium. It has the advantages of small footprint, compact space, no influence from the external environment, and high reli...

AI Technical Summary

Problems solved by technology

[0004] At present, the common practice of on-line monitoring of GIS insulation status is to place the sensor or probe inside or outside the GIS. When the sensor is placed outside the GIS, the sensitivity of the sensor is often not high due to signal attenuation and interference; However, if the sensor is placed inside the GIS, it needs to be pre-embedded in its cavity before the GIS leaves the factory. This will more or less affect the insulation characteristics of the GIS itself, and it cannot be installed in the GIS that has already been running.

In addition, the price of sensors also restricts the number of sensors installed on GIS

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