Abstract
Due to the increasing use of electric power distribution resources based on inverters, emerged a concern about the power quality in distribution systems. This is because these new elements can insert voltage or current imbalance in the system due to the configuration change and the presence of power electronics. The main disturbances caused by this equipment are voltage imbalance, harmonic distortion and long-term voltage variation. Therefore, this research aimed to analyze the power quality of distributed systems considering the variation in penetration and allocation of distribution generation and batteries represented by the output of the inverters. The IEEE 34 bus system was used for analyzing, adapted to the Brazilian electrical system, and considering low voltage branches. The results obtained showed that for each electromagnetic disturbance there is an allocation that results in smaller insertions of this disturbance, and it is not possible to have an allocation, among those analyzed, that help to mitigate all disturbances in the system. The penetration of distributed generation directly affects the power quality disturbances, causing some harmonics to increase. As for the long-term voltage variation and voltage imbalance, it depends on the system configuration.
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