Differential Protection Algorithm Founded on Kalman Filter-Based Phase Tracking

Owing to the large magnitude of inrush currents, functionality differential protection power transformer may be threatened in correct discrimination between and internal faults. This article enhances through a computationally efficient method that utilizes phase angle current signals transformers (CTs). The proposed criterion (PDC) tracks fundamental CTs. While during an fault, angles both CTs are almost constant phase, external fault have notable distance. On this ground, employs developed Kalman filter (KF)-based estimator measure Afterward, PDC is introduced measures distance estimated CT’s currents. Evaluating effectiveness with several simulated experimental recorded reveals able detect faults even presence CT saturation also deal