System and method for accurately monitoring and computing ageing life of a transformer in a smart grid framework

The method for development of a correction factor for an equivalent ageing rate calculation of a transformer by indirect method in a smart grid framework, the method comprising:

• conducting accelerated ageing experiments on a model transformer, wherein stepped loading applied on the model transformer to perform stress accelerated ageing experiment;
• analyzing the deviations between the Lot, (loss-of-life) curves obtained using the direct method and indirect method of life assessment of the transformer;
• developing a correction factor based on analysis of the deviations between the LoL (loss-of-life) curves obtained using the direct method and indirect method;
• including a time scale factor as an exponential coefficient of the correction factor and modifying the exponential coefficient of said correction factor empirically to adapt for the equivalent ageing rate calculation of the transformer, and
• introducing said correction factor into an equivalent ageing rate equation of indirect method.