Mohamed  K. Atalah, Hassan  Mahmoud, Zaki  Mattar, 
    A Novel IEC 61850-Based Protection Scheme to Maintain the Generator
Synchronous Operation During Power System Disturbances,
    Journal of Engineering and Applied Sciences,
    Volume 15,Issue 1,
    2020,
    Pages 233-246,
    ISSN 1816-949x,
    jeasci.2020.233.246,
    (https://makhillpublications.co/view-article.php?doi=jeasci.2020.233.246)
    Abstract: This study proposes an IEC 61850 based protection scheme to maintain the generator synchronous
operation and prevent its tripping by the pole slipping protection (Relay 78) during system disturbances while
the transmission line distance protection (R<sub>TL</sub>) is blocked from operation. The scheme has been studied during
common system disturbances, namely sudden load applications. This scheme could maintain the synchronous
operation of the local generator and enable it to support the system during and after such disturbances;
therefore, maintaining the system stability. A real recorded incidence of generator tripping by Relay 78 in the
Egyptian grid is investigated and a new scheme to prevent such tripping during system disturbances is
introduced. The new scheme takes the advantage of using IEC 61850 communication standard in coordinating
the tripping role between Relay 78 and R<sub>TL</sub>. This scheme can be applied based on the current technologies of
protection relays. The scheme is modeled and simulated using MATLAB&reg; Software and Xelas IEC 61850
simulator. The simulated system is configured according to the typical parameters of the Egyptian national grid
220 kV. Satisfactory results have proved the scheme effectiveness.
    Keywords: Generator pole slipping protection;GOOSE messages;IEC 61850;line distance protection;power
swings;power system disturbances;protection scheme