A New Method of Improving Transformer Restricted Earth Fault Protection

Out‐of‐step protection of synchronous generators based on a digital phase comparison in the time domain

“…A digital phase comparison is presented and applied in [25–28]. It is based on the calculation of the integral of the instantaneous power of the product of two signals at an interval which equals the half of the period of the input signals.…”

Algorithm for detection of the broken phase conductor in the radial networks

“…Za referentnu veličinu algoritam koristi napon meren na početku voda. Metoda fazne komparacije predstavljena je u [14], a primenjena je u [15][16][17].…”

A New Simple Method to Avoid Maloperation of Transformer Restricted Earth Fault Relay during External Fault Events

“…However, if the neutral current is enough high during a potential case of maloperation, this method will not be helpful. The Krstivojevic and Djurić [15,16] proposed a new REF algorithm based on a time domain phase comparator that yields desirable results for inrush current condition and only single phase to ground type of external fault. Ebadi et al [17] have designed a new REF relay based on artificial intelligence which is slower than conventional method.…”