Abstract
Relay coordination is an important aspect to maintain proper power system operation and control. Relays must be organized in such a way that every main relay should have a backup relay and coordination time interval (CTI) between primary and backup and different zones of the relays should be maintained to achieve proper fault identification and fault clearance sequences. The relays should operate in minimum desirable time satisfying all the coordination constraints. So, relay coordination is nothing but a highly constraint problem. Heuristic techniques are often used to get optimal solution of this kind of problem. In this paper, this constraint problem is solved by teaching learning-based optimization (TLBO) on a IEEE 14 bus system. Proper desirable time-setting multiplier (TSM) with minimum operating time of relays is calculated. We also incorporated intelligent overcurrent relay characteristics selection to get the desired results in this work. The results seem to be satisfactory as it is working better when compared with contemporary other techniques like genetic algorithm (GA) or particle swarm optimization (PSO).
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Roy, S., Babu, P.S., Babu, N.V.P. (2019). Optimal Combined Overcurrent and Distance Relay Coordination Using TLBO Algorithm. In: Bansal, J., Das, K., Nagar, A., Deep, K., Ojha, A. (eds) Soft Computing for Problem Solving. Advances in Intelligent Systems and Computing, vol 816. Springer, Singapore. https://doi.org/10.1007/978-981-13-1592-3_9
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