Three - Winding Transformer in Symmetrical Components

This paper analyzes the symmetrical components of three-winding transformers, emphasizing the influence of winding connections on equivalent models and zero-sequence impedance. Using MATLAB simulations, the study demonstrates how delta-connected tertiary windings modulate fault currents and zero-sequence behavior. Building on prior research on two-winding transformers [8], the findings provide actionable insights for designing power system protection schemes and fault analysis methodologies.