Abstract
The analysis of overcurrent relay operation is complex when compared with other protection principles, because the time when protection should operate is unknown, as this time depends on the evolution of the fault current. The main purpose of this article is to present an analysis of the operation of overcurrent relays under different operating conditions, using computational resources. By simplifying the analysis of real or simulated events, the proposed computational tool facilitates the evaluation of the design and implementation of relays in power systems. The software also allows for the editing of the conventional and unconventional time curves. Some examples are presented to illustrate possible applications of this tool.
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