Engenharia Elétrica (UACSA)
URI permanente desta comunidadehttps://arandu.ufrpe.br/handle/123456789/2922
Siglas das Coleções:
APP - Artigo Publicado em Periódico
TAE - Trabalho Apresentado em Evento
TCC - Trabalho de Conclusão de Curso
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Resultados da Pesquisa
Item Impactos da inserção de geração distribuída no desempenho de funções de proteção de sistemas elétricos(2019-07-17) Guerra, Keylla Rayanne Albuquerque; Reis, Raphael Leite de Andrade; http://lattes.cnpq.br/1139577841043865; http://lattes.cnpq.br/8938549432716009From the need to expand the electric generation due to population and industrial growth, the connection of Distributed Generation (DG) with the electrical system has increased due to its several advantages, such as: minimization of transmission losses over long distances, location near consumer centers, minimizing environmental impacts and greater reliability. Despite being a trend, challenges to the protection system are imposed as contributions to short circuit currents may become more evident with the GD connection. In order to investigate the impact of GD on electrical power system protection functions, fault simulations were performed in the Alternative Transients Program (ATP) software, considering a 230 kV network reported in the literature. Short circuits were simulated along the evaluated power system as well as near the distance protection zone reaching, taking into account different types of disturbances. From the obtained results, the insertion of GD can affect the voltage and current signals measured by the protective device, as well as protection functions, leading them to misoperate if revisions on their adjustment settings are not performed.Item Impacto da medição de sinais de tensão em métodos de localização de curtos-circuitos baseados no domínio do tempo(2019-12-12) Silveira, Mirella Ilka Pereira da; Reis, Raphael Leite de Andrade; http://lattes.cnpq.br/1139577841043865; http://lattes.cnpq.br/0341519550011359In this work, the impact of voltage measuraments on the performance of traveling wave-based fault location functions is evaluated. Basically, one- and two-ended fault location algorithms were implemented in Matlab, being the voltage and current measurements used as data input for the routines taken from a coupling capacitive voltage transformer (CCVT) and a current transformer (CT), respectively. The performance of the fault location techniques is investigated by several short-circuit simulations in a 230 kV electrical power system, considering variations in the fault parameters such as resistance and inception angle. The CCVT dynamic response is also token into account, especially in the one-terminal routine, which is rarely reported in the literature. From the obtained results, it can be seen that the two-terminal algorithm has shown to be more robust, since more information about the power network is used as input data, although it depends on a communication path. Regarding the one-terminal function, the CCVT dynamic response end may change the wave polarities detected at the monitored end, which affects the technique if ways to compensate the CCVT frequency response are not available.