Análise da qualidade de energia de redes de distribuição rurais: controle de tensão e gerenciamento da partida de motores

Abstract

In the Western Frontier region of Rio Grande do Sul, the largest producer of irrigated rice in the state, uses electricity in the planting phase, using irrigation and post harvest with drying and storage of grain. Therefore, the quality of energy supply in rural networks is extremely important, but many producers identify supply failures, because in these networks there are strong voltage fluctuations in feeders due to seasonal irrigation loads of rice fields. Therefore, power quality becomes an important and relevant subject of study, as well as being part of the community context. It is well known that one of the main causes of low power quality is the start of induction motors due to the voltage variation exerted by this type of load. In this context, this paper proposes to analyze the energy quality of the rural distribution networks used by the rice producers of the State West Frontier. The methodology used for the proposed analysis is to perform voltage control using the back-to-back converter from the reactive power injection (VAr) in the rural network. In this way, the induction motor starter will be managed to control the voltage levels of the countryside and thus improve the power quality.