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This paper presents a novel method for estimating the degradation of solid insulation in power transformers, considering thermal ageing and paper moisture dynamics. Current ageing models are based on both, experimental evidence and theoretical developments; considering that all models are approximation to reality, loss of life estimation could be found in a large range depending on the evidence considered;...
This paper presents a sensitivity analysis of a health index of power transformers tool, in order to identify the importance of each input to determine most important and those that can be dismissed to simplify the calculation process without significantly affecting the effectiveness of answers. To achieve objective, a methodology based on a study case is proposed which, starting from a set of real...
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