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Surge impedance modeling of high power transmission towers and electrical grounding

Grant number: 15/10204-8
Support Opportunities:Regular Research Grants
Duration: October 01, 2015 - September 30, 2017
Field of knowledge:Engineering - Electrical Engineering - Power Systems
Principal Investigator:Eduardo Coelho Marques da Costa
Grantee:Eduardo Coelho Marques da Costa
Host Institution: Escola Politécnica (EP). Universidade de São Paulo (USP). São Paulo , SP, Brazil
Associated researchers:André Jinno Gomes Pinto


Several transmission line sections, composed of towers with 120 up to 350 meter high, are proposed to overcome natural barriers and technical issues in a few countries in Asia and also in the link from the Northern Brazil to the Interconnected National System (SIN). The geometrical characteristics and environment which these towers are immerse have a direct influence in the electrical performance of these systems, taken into account that these characteristics are intrinsically related to the electrical parameters of this stretches, in steady state as well as in transient state. In a first approach, the principal electrical variations are evaluated between the tall line sections and a conventional line configuration, with approximated 40 meters height. The electrical parameters and propagation characteristics of the two line sections will be compared and properly analyzed. In a second stage, the conventional tower models applied for analysis of fast and impulsive transients (atmospheric impulses), will be evaluated for simulation of electromagnetic transients on tall line sections. An evaluation of the surge impedance and possible overvoltages is proposed as a function of the tower height and available modeling techniques. The same modeling techniques developed for power transmission towers can be applied for modeling of grounding grids and electrodes of tower and various electrical systems or even buildings. (AU)

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Scientific publications
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
MARQUES COSTA, EDUARDO C.; LOURENCO, LUIS FELIPE N.; PEREIRA, CARLOS EDUARDO M.; PEROTONI, MARCELO BENDER; CARDOSO, JOSE ROBERTO; SARTORI, CARLOS ANTONIO F.. Evaluation of analytic formulations for surge impedance calculation of tall transmission towers. INTERNATIONAL JOURNAL OF ELECTRICAL POWER & ENERGY SYSTEMS, v. 114, . (18/10952-2, 15/10204-8)
ARAUJO, ANDERSON R. J.; KUROKAWA, SERGIO; SHINODA, AILTON A.; COSTA, EDUARDO C. M.. Mitigation of erroneous oscillations in electromagnetic transient simulations using analogue filter theory. IET Science Measurement & Technology, v. 11, n. 1, p. 41-48, . (15/10204-8)
CABALLERO, PABLO TORREZ; MARQUES COSTA, EDUARDO C.; KUROKAWA, SERGIO. Frequency-dependent line model in the time domain for simulation of fast and impulsive transients. INTERNATIONAL JOURNAL OF ELECTRICAL POWER & ENERGY SYSTEMS, v. 80, p. 179-189, . (14/17051-0, 15/10204-8)

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