Relay coordination studies – It is a well-known fact that the power system is not completely free from failures/faults. The key here is to mitigate the consequences during the event of faults. Damage to equipment during a fault can be reduced by quickly isolating the faulty portion from the rest of the health system. The objective of the protection coordination study is to determine optimum settings for protection devices such that the protection system isolates the minimum possible faulty portion at the earliest possible to ensure a reliable power supply for the health system. The optimum settings ensure required sensitivity and selectivity that protect workers from harm as well. The software used for the protection coordination study is ETAP, DigSilent Power factory, PSCAD, and PSS/E. The protection coordination study involves protection devices from various manufacturers such as Siemens, ABB/Hitachi, GE, Schneider, and so on.
