| Full text | |
| Author(s): |
Asorza, Jesus E. Guevara
;
Colqui, Jaimis S. L.
;
Pissolato Filho, Jose
Total Authors: 3
|
| Document type: | Journal article |
| Source: | Electric Power Systems Research; v. 240, p. 10-pg., 2024-11-27. |
| Abstract | |
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) | |
| FAPESP's process: | 21/11258-5 - Engineering Research Center for the Aerial Mobility of the Future (ERC-AMF) |
| Grantee: | Domingos Alves Rade |
| Support Opportunities: | Research Grants - Research Centers in Engineering Program |
| FAPESP's process: | 21/06157-5 - Statistical study of overvoltages due to maneuvers in the EAT transmission lines considering the freqency dependence of the electrical parameters of the soil |
| Grantee: | Jaimis Sajid Leon Colqui |
| Support Opportunities: | Scholarships in Brazil - Post-Doctoral |
| FAPESP's process: | 23/05066-1 - Study of transient overvoltages in underground and submarine transmission lines considering rigorous models for calculating ground-return parameters |
| Grantee: | Jesus Enrique Guevara Asorza |
| Support Opportunities: | Scholarships in Brazil - Master |