An accurate hysteresis model for ferroresonance analysis of a transformer

Summary form only given. This paper introduces an accurate transformer core model, using the Preisach Theory, to represent the core magnetization characteristic. This modeling approach provides the required precision to match major and minor hysteresis loops of the model with those of the actual transformer core material. Using the proposed model, the ferroresonance phenomenon of a Voltage Transformer (VT) is simulated and compared to the corresponding experimental results. In addition, the simulated ferroresonance behavior of the VT based on (i) the EMTP-RV Hysteric Reactor model, (ii) the EMTP Reactor Type-96 model, and (iii) a single-valued polynomial as magnetization characteristic, is also deduced and compared with the proposed model and the experimental results.