Avaliação de técnicas passivas de detecção de ilhamento em redes aéreas e subterrâneas

Abstract

The quest to increase efficiency and reduce the environmental impacts caused by electricity production has driven the search for new methods of managing the energy flow in the electric power system, in this context distributed generation, that is, the connection of generators to the power system. distribution by concessionaires, presents itself as an alternative that is constantly growing in Brazil. Parallel to this growth, standards and technical recommendations emerge that establish minimum requirements for the connection of new electricity producers to the system, among them the prohibition of energy generation in case of islanding, as this configuration puts the safety of people and equipment at risk. , in addition to impacting the quality of electricity supplied to local consumers. Thus, this course conclusion work seeks to evaluate the detection of the islanding phenomenon with the passive methods Rate of Change of Frequency (Rocof) and Vector Jump Relay (phase jump or vector jump) verifying the behavior of these two protections in aerial and underground distribution network environments. The passive methods were tested in the Matlab/Simulink Simulation environment using the IEEE 13 bus test system that presents in its sections with these specificities, tests were carried out with 10 scenarios of active power imbalance seeking to define the non-detection zone of these relays. Finally, in the tests in a simulation environment, it was verified that the type of distribution network is not a determining factor for changing the behavior of the relays when detecting the islanding phenomenon, since there was no change in the non-detection zones in both excerpts submitted for evaluation.