Development of a Power Transformer Terminal Transient Model

In this paper the importance of transformer transient models is discussed and the different transformer transient models are classified. The existing terminal transformer transient models are introduced briefly. Two important transformer transient models are reviewed; the multi-winding transformer terminal transient model from name plate information and a frequency dependent transformer transient model. The methods of development of these two models are presented briefly. These two important modeling techniques are employed for determining the terminal transient model of a testing transformer available in the High Voltage laboratory of School of Electrical Engineering in UNSW. The necessary measurements are carried on to provide the required data for developments of the models. The time domain responses of resultant models to different voltage surges are evaluated in ATP program and the capabilities of these two models are compared.