Dynamic loading of distribution transformers from models of dynamic thermal

It is known that to monitor intrinsic life of transformers variables has been the object of concern in regard to avoid economic losses caused by faults in such equipment. It is possible through the system management, maximize the lifetime and improve grid reliability, which could also reduce maintenance costs. This paper brings a contribution to the development of these systems by proposing and testing a model based on the enhancement of IEEE standard for modeling the top oil and the hot spot temperature of distribution transformers of Manaus Energia Utility to establish maximum loading limits for the equipment that minimize the loss of lifetime. The results were compared with a standard IEEE model, which presented more conservative results.