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Design and Implementation of Scenarios for Evaluating and Testing Distance Relays

-This paper introduces a novel approach for evaluating protective algorithms and testing protective relays. The behavior has to be evaluated and tested for many scenarios in power system. The scenarios that encompass specific faults as well as a variety of the events in normal operating state are discussed. A set of power network models developed for studying distance relaying is introduced. Capabilities of these models, and some of dedicated software tools such as Alternate Transient Program (ATP), EUROSTAG and MATLAB'S Power System Blockset (MATLAB/PSB), to implement described events are discussed. An example of comparative simulation responses, by using different programs for implementing the same model and event is provided at the end. Keywords--distance relays, power system modeling, power system faults, electromagnetic transients, software tools.