Resumo -O aumento da demanda de energia elétrica e o crescimento da geração distribuída levam ao aumento da corrente de curto-circuito nas subestações. A maioria das subestações brasileiras, por exemplo, foram projetada décadas atrás, portanto seus equipamentos podem não suportar os novos níveis de corrente de curtocircuito. Para proteger os equipamentos instalados ou evitar altos custos de investimento na sua substituição destes, é possível instalar limitadores de corrente de curto-circuito. Este trabalho apresenta uma avaliação de duas topologias de limitadores através de análises dos aspectos técnicos e operacionais. Protótipos de pequena escala são empregados para entender melhor essas análises. As topologias estudadas são denominadas indutor série chaveado e circuito ressonante. A corrente de curto-circuito teve uma redução para a topologia indutor série chaveado de 69,7% e 72,6% para a topologia ressonante.Abstract -The increase in demand for electric power and the growing of distributed generation led to the increase of the short-circuit current in the substations. Most of these Brazilian substations, for example, were designed decades ago, so their equipment may not support the new short-circuit current levels. To protect the installed equipment or to avoid high investment costs in replacing them, it is possible to install fault current limiters. This work provides technical evaluation of two known topologies of fault current limiters through theoretical analyses of technical and operational aspects. Small-scale prototypes are employed to get a better understanding of those analyses. The studied topologies are called series switched-inductor and resonant circuit. The short-circuit current had a reduction for the switched-inductor topology of 69.7% and 72.6% for the resonant topology.
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