Methodologies for the Detection of Magnetizing Inrush and Fault Condition in Power Transformer

Trustworthy protective scheme of a power transformer is the key criterion due to its vital part in power system. Protective schemes are mainly affected by nonlinear characteristics of transformer core and its inrush condition. Hence, a dedicated transformer protection scheme is the necessity for smooth operation of power system. This article includes effect of inrush, past methodologies for detection of inrush and fault condition. Several journal articles, various books and research thesis are thoroughly analyzed for the identification of inrush and fault conditions. Different methodologies used for successful discrimination of fault and inrush situations are elaborated by comparative evaluation. Moreover, various inrush and fault conditions are performed on hardware developed in laboratory environment. Authors have also suggested two techniques for transformer inrush and fault identification purpose in this article.