Evaluation of Protection Algorithms: Simulation of Open Loop in ATP

This paper evaluated the performance of general algorithms applied by differentials protective relays through the digital simulation of open loop, by means of the signal processing registered during real events of the system where these relays are installed, with the aid of program Alternative Transient Program (ATP) with the purpose of providing a computacional tool that allow understand better these events, with the real possibility to improve the operative performance of the involved protections and to increase the power quality.