Agent based coordinated control of protection devices for transient stability enhancement

This paper presents the use of the multi-agent technology in order to enhance the transient stability of power systems by the dynamic evaluation of the critical clearing time (CCT) including the effect of the distance of fault locations and the impact of the renewable energy source (RES) integration. A multi-agent framework is developed in this research, where the intelligent agents use an algorithm for coordinating the protection devices to isolate the faulted part from the rest of the system before the corresponding CCT, so as to increase the stability margin of the system for the transient stability assessment. Simulations are carried out on a multimachine test system for different fault locations and the stability of the system is observed from the simulation of the machine´s relative rotor angles.