Accurate Superimposed Component Estimation for Improved Relay Performance During Power Swing

There is continuous variation in amplitude, phase, and frequency of voltage current signals during power swing a system. Such makes the memorized prefault data less accurate to be used as nonfault component while computing superimposed quantity for protection decisions swing. In this article, signal characteristics are analyzed technique proposed obtain correct components computation. The accuracy method estimating observed different conditions simulated 39-bus New England system field data. relay performance improvement also provided applying directional relaying, fault type classification, location applications faults Comparative assessment reveals superiority improving computed