Remaining lifetime of power transformers and transformer population

A study is initiated on remaining lifetime estimation of power transformers and populations of power transformers. Most transformers were installed several decades ago, and approach their end of life. In view of the expected replacement wave of power transformers a reliable tool is required to obtain insight in the reliability of these assets.

A model is being developed which, on basis of all available (incomplete) data on the transformer, gives a prediction of the expected remaining lifetime. In addition, the uncertainties in the prediction are determined. The key concept is to define proper quality parameters for the relevant degradation mechanisms. Updating their values can increase the prediction reliability. The model can be applied to individual power transformers as well as to population of transformers (link to CMD-poster Arjan)