Title :
Improving the reliability of transformer gas-in-oil diagnosis
Author :
Duval, Michel ; Dukarm, James
Author_Institution :
IREQ, Varennes, Que., Canada
Abstract :
Dissolved gas analysis (DGA) is widely used to detect incipient faults in oil-filled electrical equipment. There is always some degree of inaccuracy in laboratory dissolved-gas measurements, especially at low gas concentrations, which affects gas ratios and other diagnostic calculations. This paper examines the measurement inaccuracy problem in detail using recent CIGRE data. It shows how proper allowance for this inaccuracy can improve transformer condition assessment and diagnosis by DGA.
Keywords :
condition monitoring; fault location; measurement uncertainty; reliability; statistical analysis; transformer oil; dissolved-gas analysis; fault detection; oil-filled electrical equipment; statistical calculations; transformer condition assessment; transformer gas-in-oil diagnosis; Costs; Dissolved gas analysis; Electrical fault detection; Fault diagnosis; IEC standards; Laboratories; Oil insulation; Petroleum; Power transformer insulation; Reproducibility of results;
Journal_Title :
Electrical Insulation Magazine, IEEE
DOI :
10.1109/MEI.2005.1489986
