Advanced Leakage Inductance Model for Transformer Transient Simulation

Transformer models in EMTP which provide interphase mutual inductance leakage representations have deficiencies with respect to core modeling. Parameter estimation is also a concern when no or incomplete sources of information are available. The "hybrid" transformer model in EMTP-ATP addresses these issues by allowing the integration of the leakage representation with a duality-derived topologically correct core model, and providing flexible estimation of leakage parameters based on known information. This paper details the development of the leakage model, its integration with the topologically correct core, and the related parameter estimation methods.