A system and method for evaluating the connection of gil conductive rods based on the resistive potential difference ratio

Abstract

The invention discloses a GIL conductive rod connection evaluation system and method based on resistive potential difference ratio. Section GIL conductive rod, the current end of the connecting segment GIL conductive rod is connected to the current transformer, the current source and the current end of the non-connecting GIL conductive rod in turn, and the GIL conductive rod is also connected with a potential difference test circuit. The present invention is based on the GIL conductive rod The poor contact of the contact in the connecting section will cause the change of the impedance along the axis of the conductive rod, which will inevitably lead to the change of the potential difference of the connecting section. The unconnected section of the GIL conductive rod is used as the reference to replace the standard AC impedance, and the surface of the connected section and the non-connected section The resistive potential difference ratio is used as an evaluation parameter to realize the evaluation of the connection quality (state) of the GIL guide rod. This method has the advantages of not being affected by the temperature of the testing environment and having strong anti-interference ability.

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

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