The number of constraints in coordination of distance and directional overcurrent relays (D&DOCRs) in power systems increases significantly by considering changes in network topology, especially in large power systems. ...

In this study, a new method for optimum coordination of overcurrent relays is proposed. In order to solve the overcurrent relays coordination problem, a Q-learning based cooperative multi-agent system is designed and applied. In the proposed method...

Generally the relay coordination problem is solved without considering parameter

uncertainties. While uncertainties in the line parameters and CT ratios make the fault current

passing through the overcurrent ...

Abstract—The directional overcurrent relays (DOCRs) coordination

problem is usually studied based on a fixed network

topology in an interconnected power system, and is formulated as

an optimization ...

In real power systems, the network topology is

subjected to uncertainty due to single-line outage contingencies,

maintenance activities, and network reconfigurations. These

changes in the network ...