Electromechanical analysis of underbuilt wire use in transmission lines

Autor(es)

Asorza, Jesus E. Guevara ; Colqui, Jaimis S. L. ; Pissolato Filho, Jose

• Tipo de documento: Artigo Científico
• Fonte: Electric Power Systems Research; v. 240, p. 10-pg., 2024-11-27.

Resumo

This paper explores the effects of installing four different underbuilt wires (UWs) on a 220 kV single-circuit overhead transmission line (OHTL) through comprehensive mechanical and electrical analyses. Our goal is to identify the optimal placement of UWs to improve lightning performance while minimizing mechanical stress. By integrating these analyses and offering clear design guidelines, we aim to advance academic research and practical engineering in lightning protection. Mechanically, detailed load calculations using PLS-CADD software and the Marjerrison formulation revealed that using three different UW cross-sections minimally impacts mechanical loads, while one specific UW cross-section requires significant reinforcement. Regular inspections of tower steel members are essential due to potential environmental degradation. Electrically, PSCAD software was used to evaluate UW effectiveness in reducing overvoltage and backflashovers across various soil resistivities and lightning waveforms. The results indicate that increased UW cross-section slightly reduces overvoltage on insulator strings, but this effect is minimal. UWs are less effective in high-resistivity soils and under high lightning current scenarios. (AU)

• Processo FAPESP: 21/11258-5 - Centro de Pesquisa em Engenharia para a Mobilidade Aérea do Futuro (CPE-MAF)
• Beneficiário: Domingos Alves Rade
• Modalidade de apoio: Auxílio à Pesquisa - Programa Centros de Pesquisa em Engenharia
• Processo FAPESP: 21/06157-5 - Estudo estatístico das sobretensões transitórias em sistemas de potência: modelagem de linhas de transmissão de EAT e sistemas de aterramento em solos com parâmetros variáveis com a frequência
• Beneficiário: Jaimis Sajid Leon Colqui
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado
• Processo FAPESP: 23/05066-1 - Estudo das sobretensões transitórias em linhas de transmissão subterrâneas e subaquáticas considerando modelos rigorosos do cálculo dos parâmetros de retorno do solo
• Beneficiário: Jesus Enrique Guevara Asorza
• Modalidade de apoio: Bolsas no Brasil - Mestrado