An adaptive algorithm for overcurrent protections on the case study IEEE9
A proper coordination of electrical protections is fundamental in electric power systems, with the aim of avoiding unexpected disconnections. These disconnections can produce problems in the operation of the power system and in its different components. Even though this activity has complex tasks in great power systems, currently exist some automatic methods for coordination of protections applicated in study cases. In this document, an adaptive algorithm for coordination of four directional overcurrent relays located in two adjacent transmission lines in the nine bars study case IEEE9 is developed. Two protections per transmission line. Afterwards, an analysis of the obtained results is exhibited, explaining some characteristics of the power system and relating them with the behavior of the parameters of the relays, due to topology changes in the network. Finally, the conclusions about the results and the performance of the algorithm are mentioned. The contributions of this work are shown in the analysis of an innovative alternative in Colombia, that allows optimize the use of the protections scheme in power systems. Likewise, the obtained results allow to validate the implementation of the algorithm in real devices in a segment of the electric network in Colombia, which is property of CODENSA.
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