Com o aumento da inserção de unidades de geração, principalmente fotovoltaica e eólica, nos sistemas de distribuição modernos, tem sido muito discutido como essas podem auxiliar no suporte a rede. O controle de tensão e compensação de reativos em redes têm sido os mais abordados, muitas vezes como forma de auxílio a reguladores de tensão e bancos de capacitores. O presente artigo tem como objetivo analisar as perdas técnicas em um alimentador de um sistema de distribuição real quando a geração é usada para suporte de reativo. Foram avaliados os controles de "fator de potência" e da tensão no ponto de conexão. Como caso de estudo foi usado um sistema de distribuição real disponibilizado pelo Electric Power Research Institute. Notou-se que o controle de reativo empregado pelasgerações distribuídas altera as perdas dos elementos do sistema.
This paper aims to present a comparative study among the self and the mutual inductances of a 6x4 switched reluctance machine prototype. Se same study was made with a French origin 8 x 6 machine. The second study confirmed the conclusions on the first one. Mechanical adaptations were made in the test bench to strongly block the rotor of the machines in any previously defined position in order to allow the experimental measurements. At each rotor angular position data were collected for different currents, step by step. The rotor position was also changed step by step from the aligned position to the position of minimum inductance. A data bank was constructed depending on both: rotor angular position and current. A mathematical model taking into account the mutual inductances is presented. Also are presented simulations results using the data got in the test bench. Results of simulations made with and without the mutual inductances values were compared. Surfaces that represent the inductances are presented for both machines. The results analyses show that the mutual inductances may have important influence in the simulation, design and, therefore, in the switched reluctance machines performance.
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