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Felipe B. B. Rolim (IC), Fernanda C. T. Arioli (PQ). Abstract The increase in the penetration level of distributed generation in electrical power distribution systems all around the world resulted in the need for specialized and easy tools to help engineers, researchers and students in understanding and solving technical challenges related to this reality. Among the studies that can be benefited by these simulation tools, one can highlight studies related to power system protection. Consequently, detailed and reliable models are needed. In this context, the research group of the School of Electrical and Computer Engineering from University of Campinas developed a relay library (with dynamic models): DG ProtectionLib. The objective is to offer this library online and free, so its use can be widespread and the models can be improved and used to support protection studies. This work aims to conduct protection studies in distribution systems with different technologies of distributed generators and provide representative examples of application of these relays. The development of a didactic presentation of the library models will assist further studies in this area and the use of the library by other researchers, students and engineers.

Protection Studies of Electrical Power Systems with Distributed Generation Using an Open Library of Protective Relays