A method for precise location of failure points in gil withstand voltage test

Abstract

The invention discloses a method for accurately positioning a fault point of a GIL voltage withstand test. The method comprises the following steps: performing a first aging test on a GIL, judging whether a continuous abnormal alarm occurs in a test system, if so, performing error-proof detection, and otherwise, performing a second aging test on the GIL; performing the second aging test on the GIL, judging whether the continuous abnormal alarm occurs in the test system, if so, performing error-proof detection, and otherwise, performing a third aging test on the GIL; performing the third agingtest on the GIL, judging whether a breakdown and / or flashover phenomenon occurs, if so, judging whether an SF6 spectrum detection system alarms, and otherwise, proving that the GIL has no fault point;and if the SF6 spectrum detection system alarms, completing the positioning of the fault point, and if the continuous abnormal alarm does not occur, performing error-proof detection. The method disclosed by the invention has the beneficial effects that the insulation problem can be quickly found in the initial stage of the exposure of insulation defects, and the defect positioning can be quicklyrealized.

Description

technical field [0001] The invention relates to the field of GIL detection, in particular to a method for accurately locating fault points in a GIL withstand voltage test. Background technique [0002] Gas insulated transmission line (GIL) is an important power transmission equipment, which has the advantages of not being affected by environmental factors such as harsh weather, high space utilization rate, small electromagnetic influence, large carrying capacity and low failure rate. GIL AC withstand voltage test is an important on-site handover test item to check whether there are insulation defects in the equipment after GIL has been transported and assembled over a long distance. GIL is generally long in length, and one SF6 gas chamber generally consists of multiple units. Since the GIL AC withstand voltage test must be carried out as a whole section or as a whole group, once insulation breakdown, flashover, etc. occur in the on-site withstand voltage test, it is difficu...

AI Technical Summary

Problems solved by technology

[0004] In view of the above problems, the present invention proposes a method for accurately locating the fault point of the GIL withstand voltage test, which mainly solves the problem that the existing means of finding the fault point of the GIL withstand voltage test are primitive, labor-intensive and inconvenient

Images