Resistive potential difference ratio-based GIL conductive rod connection evaluation system and method

Abstract

The invention discloses a resistive potential difference ratio-based GIL conductive rod connection evaluation system and method. The system comprises a GIL conductive rod sample, wherein the GIL conductive rod sample comprises a connection-segment GIL conductive rod and a connectionless-segment GIL conductive rod which are connected in series by a contact, a current end of the connection-segment GIL conductive rod is sequentially connected with a current transformer, a current source and a current end of the connectionless-segment GIL conductive rod, and a GIL conductive rod is further connected with a potential difference test loop. The impedance change in an axial direction of the conductive rod can be caused by unfavorable contact of a GIL conductive rod connection segment to necessarily cause change of the potential difference of the connection segment, a GIL conductive rod connectionless segment is used as a reference to substitute standard AC impedance, the surface resistive potential difference ratio between the connection segment and the connectionless segment is used as an evaluation parameter, and evaluation of the connection quality (state) of the GIL conductive rod is achieved. The method has the advantages of being free from influences of a temperature of a test environment and high in interference-resistant capability and the like.

Description

technical field [0001] The invention belongs to the field of quality evaluation of conductive rods, and in particular relates to a GIL conductive rod connection evaluation system and method based on resistive potential difference ratio. Background technique: [0002] Gas-insulated transmission lines (GIL) are closed conductive rods with metal shells, compressed gas (such as SF 6 , SF 6 / N 2 Mixed gas, etc.) insulation, the shell and the conductive rod are coaxially arranged for power transmission equipment, which has the advantages of large transmission capacity, low unit loss, small environmental impact, high operational reliability, and small footprint. With the development of the electric power industry, People pay more and more attention to the development of GIL equipment. [0003] The GIL conductive rod is connected by sliding contact plug-in, and the middle contact is plug-in through the internal lock. The contact structure allows certain axial expansion and angula...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a GIL conductive rod connection evaluation system and method based on the resistive potential difference ratio, so as to solve the defect that the AC equivalent resistance does not have a suitable standard resistance under the high current test condition in the prior art

Images