Due to severe competition and restructuring taking place in the power industry, there is a need to reduce maintenance costs, operate transformers as much as possible, extend their life, and prevent unplanned outages. Hence, in the recent years the monitoring and diagnostics of transformers have attracted considerable attention of researchers and practicing engineers. The monitoring can be either offline or online. The trend is more towards online techniques due to ongoing developments in computational/analysis tools and information technology.
Insulation degradation is the primary reason for aging and eventual failures of transformers. It is usually the limiting factor in the longevity of any electrical equipment ...
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