A New Method to Identify Fault Current and Inrush Current on Transformer by Jiles–atherton Model

This paper proposes a new method to detect transformer inside incipient fault current using transformer internal parameters to determine the inside structure of transformer at good condition or bad. A transformer model was established by Jiles– Atherton theory using measured voltage and current and the initial parameters which were found using Genetic Algorithm (GA). Then, transformer internal parameters k and c can be estimated using Simplex method to easily differentiate inrush currents and incipient fault currents.