TESSA® FLEETSCAN 2D: Your fleet at a glance
Transformers installed all over the world are becoming older and older; it is not uncommon to see a 50-year-old power transformer.
Challenges
Transformers installed all over the world are becoming older and older; it is not uncommon to see a 50-year-old power transformer. Operators are facing new challenges, such as higher and fluctuating transformer loads from renewable energies, higher aging, and eventually increased probabilities of equipment failure. Moreover, the lack of information on the condition of the transformers can be seen as one of the open questions that should be covered in this scope. Whereas transformer assessments and replacements used to be based primarily on age alone (a time-based maintenance approach), the current trend is headed towards condition-based maintenance. A condition-based maintenance strategy requires information that is as precise as possible regarding the transformers and their components, as well as the broadest possible data pool. Once this data is available, correct interpretation and corresponding recommendations for action are then crucial. Furthermore, an increasing number of regulatory standards, such as ISO 55000, are being introduced, making the need for action even more urgent.
General condition assessment
Meanwhile, various diagnostic possibilities and methodologies exist in order to assess the condition of a transformer. Most of these methods aggregate the assessment to the highest level in order to provide information about the transformer condition in the form of a single number (known as health index, HI).
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