Abstract
This article presents an enhanced bio-inspired algorithm to reduce the execution time of the coordination of directional overcurrent relays (DOCRs) for on-line applications. Usually, the off-line coordination is degraded under the highly dynamic operation of electric networks such as minimal load conditions, topological changes, and unregulated source operation. The solution of coordination obtained every few minutes can both reduce the loss of sensitivity and the increase in the operation times of the relays. For this purpose, it is important to determine the execution time of the coordination algorithm using complex interconnected systems for a better evaluation. An improved Grey Wolf Optimizer (GWO) is proposed to obtain better results when compared to similar heuristic algorithms. The results using the test network systems show that this methodology can be advantageous and useful to obtain optimal relay settings in complex electrical systems with a reduced execution time of the coordination algorithm.
Published Version
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