Transformer Condition Assessment Using Dissolved Gas Analysis

  • W. H. Tang
  • Q. H. Wu
Part of the Power Systems book series (POWSYS)


The dissolved gas analysis (DGA) of transformers can provide an insight view related to thermal and electrical stresses during operations of oil-immersed power transformers. DGA has been practised widely to detect incipient transformer faults and can therefore prevent any further damage to transformers. This chapter focuses on a literature review concerning conventional DGA techniques, as well as the recent advance in DGA diagnostic techniques. Firstly the gas evolution in a transformer is introduced. Various conventional DGA diagnosis methods are then presented, which are usually combined to give a comprehensive view of internal characteristics of transformers, such as the Rogers ratio method, the key gas method, the gassing ratio method, etc. Finally, a brief introduction to the diagnostic techniques using CI for DGA are presented.


Fault Type Partial Discharge Cellulose Insulation Gassing Rate Fault Classification System 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


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Copyright information

© Springer-Verlag London Limited  2011

Authors and Affiliations

  1. 1.Department of Electrical Engineering and ElectronicsThe University of LiverpoolLiverpoolUK

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