Estudo da adequabilidade de disjuntores de classe 15 kV às solicitações de TRT

• Ano de defesa: 1999
• Autor(a) principal: Nobre, Diana Moreno
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Federal da Paraíba; Brasil; Engenharia Elétrica; Programa de Pós-Graduação em Engenharia Elétrica; UFPB
• Palavras-chave em Português: Engenharia elétrica; ENGENHARIAS::ENGENHARIA ELETRICA
• Link de acesso: https://repositorio.ufpb.br/jspui/handle/tede/8885

The voltage transient that occurs across the terminals of a pole of a switching device upon interrupion of the current flowing through the pole is called Transient Recovery Voltage (TRV). Due to power system growth, it is possible that high voltage circuit breakers are not able to interrupt short-circuit currents and to withstand the TRy. This is a study for the reevaluation of 15 kV breaker performances at Companhia Hidroelétrica do São Francisco (CHESF) Angelim Substation. Digital simulations are carried out to compute the TRV parameters and to compare them with the standard ones. Alternatives are proposed to reduce the peaks and rate of rise of TRVs. It is shown that ZnO devices placed across the breaker terminals are very effective in reducing TRV peaks.