Condition Monitoring of Power Transformer by Dissolved Gas Analysis: A Review

摘要

A review of condition monitoring of the transformer by DGA is performed in this study. It aims to support dynamic early prediction and warning model for incipient faults in liquid and solid insulation. Several DGA diagnostic methods: traditional as well as advanced logic methods are presented. The set of fault detection and fault diagnosis methods are defined in the study, with their detailed methodology. DGA methods have dissimilarity in accuracy, reliability, measurement range and repeatability. In this review paper comparison between distinct DGA methods is done, which clearly shows the superiority of methods from one another. The paper aims to help the selection of DGA interpretation techniques for specific electrical equipment depending on its abnormal or faulty conditions.