Method for tracing latent fault of sulfur hexafluoride high-voltage equipment

Abstract

The method for tracing the latent fault of the sulfur hexafluoride high-voltage equipment comprises the following steps of: detecting the concentration of each trace gas in an equipment cavity to formstandardized index data, classifying the trace gases into 10 types through clustering analysis, and analyzing the correlation degree between the classified trace gases and variables before clusteringanalysis; dividing the gases into five types, and finally performing statistical test on the standardized index data to obtain the threshold concentration of each gas, the H2 or CH4 exceeding the threshold concentration being invasive, the CF4, C2F6, CS2 or C3F8 exceeding the threshold concentration being common carbon type, the CO2, SO2F2, SO2, COS or CO exceeding the threshold concentration being severe carbon type, the H2S exceeding the threshold concentration being medium type, and the CS2 exceeding the threshold concentration being mixed type; and when the gas exceeding the threshold concentration contains more than two types of five types of trace gases, the superposition of the corresponding fault types is carried out.

Description

technical field [0001] The invention relates to the technical field of principal component analysis and cluster analysis, in particular to a method for tracing the source of latent faults of sulfur hexafluoride high-voltage equipment. Background technique [0002] SF 6 Equipment such as high-voltage circuit breakers will gradually age during operation, and latent faults will appear. These faults are often related to chemical reactions in extreme environments, accompanied by SF 6 And equipment cavity material PTFE, impurity gas O 2 and H 2 The complex reaction of O, the type and content of such reaction products are very important for the study of the chemical reactions in the black box. In the faulty SF 6 At least 13 other trace gases have been found in high-voltage electrical equipment. The information reflected by these messenger gases can be used to explore possible fault types. Messenger gases refer to gases that carry chemical reaction information, thereby improving ...

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Problems solved by technology

[0005] Therefore, it can be seen from both theory and practice that for SPSS, the powerful statistical functions of CA are applied in many fields, so it can be used for SF 6 Reliable and efficient correlation analysis of latent fault types for high-voltage circuit breakers and other equipment, but there is no relevant report so far

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