Current Transformer Modeling for Electromagnetic Transient Simulation in Protection Systems

The present work reviews the requirements associated with the modeling of current transformers for the study and simulation of electromagnetic transients related to protection systems. Having accurate models of this equipment becomes essential when evaluating the behavior of protection systems under certain operating conditions. The work focuses on the review of the criteria commonly used for modeling this equipment, with special emphasis on the impact of non-linearity modeling associated with the transformer’s magnetic core.