Influence of the soil electromagnetic characteristics in the transient responses in electric transmission lines

• Grant number: 20/10141-4
• Support Opportunities: Scholarships in Brazil - Doctorate
• Start date: August 01, 2021
• End date: December 31, 2024
• Field of knowledge: Engineering - Electrical Engineering - Power Systems
• Principal Investigator: Sérgio Kurokawa
• Grantee: Tainá Fernanda Garbelim Pascoalato
• Host Institution: Faculdade de Engenharia (FEIS). Universidade Estadual Paulista (UNESP). Campus de Ilha Solteira. Ilha Solteira , SP, Brazil
• Associated research grant(s): 24/13500-6 - XXV Brazilian Automatic Congress - CBA 2024, AR.BR
• Associated scholarship(s): 22/09182-3 - Modeling of multiphase transmission lines considering frequency-dependent soil parameters: transient analysis via ATP software, BE.EP.DR

Abstract

The longitudinal impedance and transversal admittance of a Transmission Line (TL) are dependent on the soil properties which the electrical conductors are suspended. Several models in the literature consider the soil as an ideal conductor. However, real soils are characterized by frequency-dependent electrical parameters (resistivity and permittivity) and show significant variations in high resistivities. Due to these conditions, different formulations to represent the soil with and without the frequency dependence were developed. These formulations are inserted into the soil impedance and admittance o in order to obtain precise transient responses. The transient voltages calculated for two types of phenomena that occur in the electrical system are presented: an energization of the LT (slow transient phenomenon) and an incidence of a lightning strike (fast transient phenomenon) considering real and ideal soils. Results show a significant difference between the transient responses obtained for the two types of soils (ideal and real), being more pronounced in fast transient phenomena characterized by a large frequency spectrum. Thus, TL models considering real soils will be useful in prediction and assessing the overvoltages resulting from the lightning strikes in the LT. Therefore, this project proposes an improvement in the main LT models, such as the Universal Line Model (ULM) with real soils included. The precise assessment of the transient responses will allow the correct specification in the insulator chains and a proper operation of the protection systems, reducing the possibilities of erroneous functioning , increasing the reliability of the power system and in the quality of the electricity supplied. (AU)

Scientific publications

(9)

(The scientific publications listed on this page originate from the Web of Science or SciELO databases. Their authors have cited FAPESP grant or fellowship project numbers awarded to Principal Investigators or Fellowship Recipients, whether or not they are among the authors. This information is collected automatically and retrieved directly from those bibliometric databases.)

PASCOALATO, TAINA F. G.; DE ARAUJO, ANDERSON R. J.; KUROKAWA, SERGIO; PISSOLATO FILHO, JOSE; IEEE. Transient Responses on Transmission Lines Located Above Frequency-Dependent Soil with Variable Water Content. 2021 WORKSHOP ON COMMUNICATION NETWORKS AND POWER SYSTEMS (WCNPS), v. N/A, p. 6-pg., 2021-01-01. (20/10141-4, 19/01396-1)

LEON COLQUI, JAIMIS SAJID; JUSTO DE ARAUJO, ANDERSON RICARDO; PASCOALATO, TAINA FERNANDA GARBELIM; KUROKAWA, SERGIO; PISSOLATO FILHO, JOSE. Transient Analysis on Multiphase Transmission Line Above Lossy Ground Combining Vector Fitting Technique in ATP Tool. IEEE ACCESS, v. 10, p. 11-pg., 2022-01-01. (21/06157-5, 20/10141-4, 19/01396-1)

DE AZEVEDO, W. L. M.; PASCOALATO, T. F. G.; DE ARAUJO, A. R. J.; KUROKAWA, S.; PISSOLATO FILHO, J.. Impact of concrete-encased grounding systems on lightning overvoltages in transmission lines. Electric Power Systems Research, v. 251, p. 8-pg., 2025-09-12. (21/11258-5, 22/09182-3, 20/10141-4)

GARBELIM PASCOALATO, TAIN A. FERNANDA; MANZI DE AZEVEDO, WALTER LUIZ; JUSTO DE ARAUJO, ANDERSON RIRCARDO; MARTINS-BRITTO, AMAURI GUTIERREZ; KUROKAWA, SERGIO; FILHO, JOSE PISSOLATO. Analysis of Overvoltages in Power Systems Due to Lightning Strikes: On the Effects of the Line Modeling Approach and Frequency-Dependent Soil Properties. 2024 59TH INTERNATIONAL UNIVERSITIES POWER ENGINEERING CONFERENCE, UPEC, v. N/A, p. 6-pg., 2024-01-01. (22/09182-3, 20/10141-4, 21/11258-5, 19/01396-1)

PASCOALATO, TAINA FERNANDA GARBELIM; DE ARAUJO, ANDERSON RICARDO JUSTO; KUROKAWA, SERGIO; PISSOLATO FILHO, JOSE. Effects of frequency-dependent soil electrical parameters on sequence parameters of double-circuit transmission lines. Electric Power Systems Research, v. 247, p. 12-pg., 2025-04-29. (19/01396-1, 20/10141-4, 22/09182-3)

PASCOALATO, TAINA F. G.; DE ARAUJO, ANDERSON R. J.; KUROKAWA, SERGIO; PISSOLATO FILHO, JOSE. Alternative method to include the frequency-effect on transmission line parameters via state-space representation. INTERNATIONAL JOURNAL OF ELECTRICAL POWER & ENERGY SYSTEMS, v. 155, p. 17-pg., 2023-12-21. (20/10141-4, 19/01396-1)

GARBELIM PASCOALATO, TAINA FERNANDA; JUSTO DE ARAUJO, ANDERSON RICARDO; CABALLERO, PABLO TORREZ; LEON COLQUI, JAIMIS SAJID; KUROKAWA, SERGIO. Transient Analysis of Multiphase Transmission Lines Located above Frequency-Dependent Soils. ENERGIES, v. 14, n. 17, SEP 2021. (19/01396-1, 20/10141-4)

PASCOALATO, TAINA FERNANDA GARBELIM; DE ARAUJO, ANDERSON RICARDO JUSTO; LEON COLQUI, JAIMIS SAJID; KUROKAWA, SERGIO; PISSOLATO FILHO, JOSE. A Comparison of Frequency-Dependent Soil Models: Electromagnetic Transient Analysis of Overhead Transmission Lines Using Modal Decomposition. ENERGIES, v. 15, n. 5, p. 31-pg., 2022-03-01. (21/06157-5, 20/10141-4, 19/01396-1)

PASCOALATO, T. F. G.; DE ARAUJO, A. R. J.; KUROKAWA, S.; DE BARROS, M. T. CORREIA. Realistic soil modeling in transient analysis: Effects of frequency dependence, water content, porosity and stratification on lightning overvoltages. Electric Power Systems Research, v. 251, p. 8-pg., 2026-02-01. (22/09182-3, 20/10141-4)