| Full text | |
| Author(s): |
Asorza, Jesus E. Guevara
;
Colqui, Jaimis S. L.
;
Filho, Jose Pissolato
;
Kurokawa, Sergio
Total Authors: 4
|
| Document type: | Journal article |
| Source: | IEEE TRANSACTIONS ON INDUSTRY APPLICATIONS; v. 62, n. 1, p. 12-pg., 2026-01-01. |
| Abstract | |
This paper examines the propagation characteristics and transient responses of a 220 kV overhead transmission line (OHTL) under transposed and untransposed configurations. Three approaches for calculating earth-return parameters are compared: (i) Carson's classical formulation, (ii) Pettersson's model with constant soil parameters, and (iii) Pettersson's model with frequency-dependent soil parameters. The analysis considers homopolar and non-homopolar modes for the transposed OHTL and five modes for the untransposed OHTL, using soil resistivities of 100, 1000, and 10,000 Omega m. For all cases, energization and lightning responses were analyzed and compared using PSCAD simulations. Results indicate notable differences in attenuation constants and phase velocities at high frequencies, revealing a threshold where attenuation trends shift depending on ground losses. Furthermore, lightning response analysis shows that incorporating ground losses reduces backflashover occurrences by enabling higher current distribution to adjacent towers through shield wires. These findings underscore the critical role of frequency-dependent modeling and accurate soil parameter characterization for analyzing transient and high-frequency phenomena in OHTLs. (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 - Applied Research Centers Program |
| FAPESP's process: | 24/14472-6 - Lightning study in mixed overhead-underground transmission lines using rigorous formulations for computing earth-return parameters. |
| Grantee: | Jesus Enrique Guevara Asorza |
| Support Opportunities: | Scholarships abroad - Research Internship - Master's degree |
| 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 |