Optimal coordination of directional overcurrent relays consideringdefinite time backup relaying |
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Authors: | Perez L.G. Urdaneta A.J. |
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Affiliation: | Univ. Simon Bolivar, Caracas; |
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Abstract: | A methodology is presented for the consideration of definite-time backup relays in the optimal coordination of directional overcurrent relays using linear programming. It is shown that the influence of considering second-zone distance relays and breaker failure relays impose important requirements for the determination of the time dial settings of directional overcurrent relays. The paper introduces a revised formulation of the optimization problem. Results are presented for the application of the methodology on a power system with 2 generators, 9 buses, 2 transformers and 7 transmission lines |
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