Limitador de corrente de falta supercondutor

• Ano de defesa: 2005
• Autor(a) principal: Oliveira, Flávio Duarte Couto
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Federal do Espírito Santo; BR; Mestrado em Engenharia Elétrica; Centro Tecnológico; UFES; Programa de Pós-Graduação em Engenharia Elétrica
• Palavras-chave em Português: Aparelhos e materiais elétricos - Proteção; Cerâmica; Curtos-circuitos; Supercondutividade; Engenharia Elétrica; 621.3
• Link de acesso: http://repositorio.ufes.br/handle/10/4034

The goal of this work is to present a resistive superconductor fault current limiter. For this study was used a SFCL based on Hg0.8Re0.2Ba2Ca2 Cu3O8+δ (Hg-1223) ceramic made in High Pressure Lab - UFES. Among all the high Tc superconductor cuprates, the Hg-1223 compound has record transition temperature, i.e., Tc = 135 K under normal pressure.To this aim, the work shows a discussion about fault current limiters and a heuristic review of superconductor theory describing the principal characteristics. Furthermore, sample preparation as well a design methodology for a resestive type limiter are described here. The performance of the device is evaluated under several fault conditions. It has been verified that intense over-current did not cause loss of sample stoichiometry showing the viability of this type of device for future application.