Chromatographic diagnosis method of oil-immersed type transformer on-load switch leakage

Abstract

The invention discloses a chromatographic diagnosis method of an oil-immersed type transformer on-load switch leakage. According to the invention, a chromatographic analyzer detects gas components and concentration contents in a transformer body oil tank, each phase of sleeve oil chamber and on-load switch oil conservator insulation oil for at least three times; according to the detection time, a trend graph where time is taken as the transverse coordinate and the gas components and the concentration contents are taken as the horizontal coordinate is drawn; according to the trend graph, the gas components and the concentration contents in each part of insulation oil of each transformer are judged according to a certain rule, and if the judgment condition is met, the oil-immersed type transformer on-load switch leakage is determined. According to the invention, disadvantages in traditional judgment of the on-load switch oil leakage are overcome; the existence of oil leakage faults of the on-load switch is effectively diagnosed; mis-judgment is avoided; diagnosis efficiency is improved; fault power outage and diagnosis cost of the transformer is reduced; normal production orders are ensured.

Description

technical field [0001] The invention relates to a chromatographic diagnosis method for oil-immersed transformer on-load switch leakage. Background technique [0002] Dissolved gas chromatographic analysis (DGA) in the insulating oil of oil-immersed transformers is an effective method for diagnosing oil-immersed transformer faults in the power industry. Because it does not require power outages and has high accuracy in judging faults, the power preventive test will use it It ranks first and is widely used in power systems. However, when using DGA to judge oil-immersed transformer faults, it is often necessary to analyze and diagnose according to the actual equipment operation conditions. Especially for the operation status monitoring of large-scale oil-immersed transformers, in addition to the operation status of the transformer body, there are also transformer three-phase bushings, The state of the transformer on-load switch always affects the normal and safe operation of t...

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Problems solved by technology

[0005] The advantage of the above-mentioned conventional method lies in intuitive detection, which can directly confirm the fault; the disadvantage is that the transformer needs to be shut down for a long time, which consumes a lot of manpower, material and material resources, and seriously interferes with the normal production order.

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