Trends in Power System Protection Researches: A Review of Fundamental Relays

Power system protection is one of the main element of modern energy management concept.The main task of these systems is to deactivate the faulty element or network part as soon as possible.The protection relays, called intelligent electronic devices, also have different functions than these basic functions. However, overcurrent, distance and differential protection are still used as the three basic components.In this study, current studies on these relays for coordination of the protection system have been analyzed. The research topic is limited to the main functions of the relays. Further study will examine the tasks that these relays have in providing data to the energy management system. It can also focus on the concept of wide area protection, event recording and modern communication protocols.