Temporary overvoltage suppression in half-wavelength transmission lines during asymmetric faults

Autor(es)

Albuquerque, Felipe Proenca ^[1] ; Ribeiro Pereira, Ronaldo F. ^[1] ; Marques Costa, Eduardo C. ^[1] ; Bartocci Liboni, Luisa H. ^[2]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Polytech Sch, Dept Energy & Automat Engn, Sao Paulo, SP - Brazil

^[2] IFSP Fed Inst Educ Sci & Technol Sao Paulo, Sertaozinho, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Electric Power Systems Research; v. 178, JAN 2020.
• Citações Web of Science: 0

Resumo

This paper approaches the principal electric characteristics of half-wavelength transmission lines and possible voltage transients resulted from asymmetric faults. Although this non-conventional AC transmission technique presents some attractive advances for electric power transmission through long distances, when compared to the well-established HVDC systems, some important issues should be investigated on eventual overvoltage levels along half-wavelength transmission lines during temporary asymmetric operation conditions, e.g. phase-toground fault and single-phase reclosing. In this research, an iterative computational routine locates the overvoltage points by varying the asymmetric fault location from the sending to the receiving end of the transmission line. This procedure provides a full mapping of the most critical overvoltages as a function of the fault point through the line length. Since the most critical fault occurrences and overvoltage locations are known, an alternative method for overvoltage suppression is proposed by using line surge arresters directly at the phases in parallel with the tower insulators. This technique represents an original method to contain overvoltages at middle sections of half-wavelength transmission lines. (AU)

• Processo FAPESP: 16/16078-7 - Modelagem de para-raios de óxido metálico para simulação de transitórios eletromagnéticos em sistemas de potência
• Beneficiário: Felipe Proença de Albuquerque
• Modalidade de apoio: Bolsas no Brasil - Iniciação Científica
• Processo FAPESP: 18/10952-2 - Análise do Desempenho de Sistemas VSC-HVDC frente Impulsos Atmosféricos
• Beneficiário: Eduardo Coelho Marques da Costa
• Modalidade de apoio: Auxílio à Pesquisa - Regular