An Evaluation of Different Health Assessment Methods on 50 MVA Power Transformer: A Case Study

Transformers are considered to be important and expensive apparatus used in electrical systems. Therefore, it is important to determine their operational conditions, and thus it is required to employ quality control tests for testing of an insulation design of oil filled transformers. The effect of aging on insulating oil in transformer in terms of physical, chemical and electrical properties has been studied in this paper. As a critical asset, transformer failures can cause equipment damage, customer outages, and safety concerns. In this paper, the three important methods of Dissolved Gas Analysis (DGA) have been discussed to assess transformer health and experiments are performed on 50MVA power transformer.