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Development of a method to estimate asymmetric transmission line parameters from on-line measurements: Application for short, medium and long line lengths

Grant number: 13/00974-5
Support type:Scholarships in Brazil - Post-Doctorate
Effective date (Start): May 01, 2013
Effective date (End): March 31, 2015
Field of knowledge:Engineering - Electrical Engineering - Power Systems
Principal researcher:Sérgio Kurokawa
Grantee:Eduardo Coelho Marques da Costa
Home Institution: Faculdade de Engenharia (FEIS). Universidade Estadual Paulista (UNESP). Campus de Ilha Solteira. Ilha Solteira , SP, Brazil


This project proposes the development of an estimation method for the transmission line parameters based on the phase current and voltage measurements at the sending and receiving ends in fault situations. Considering that a small three-phase line can be represented by a lumped element (denominated three-phase À circuit), the total three-phase line length can be represented by two or more three-phase À circuits connected in cascade. From the current and voltage measurements at the line terminals, and representing the line by a cascade with two or more À circuits, the equations associated with the currents and voltages of the line as a function of the longitudinal and transversal parameters can be obtained. From these equations, a system is obtained with number of variables (line parameters) minor than the number of equations, where the solution can be obtained by a proper solution methodology. The proposed method can be used for estimation of asymmetrical transmission lines parameters with short, medium and long lengths. Thus, a major accuracy is expected in the parameters estimation of three-phase lines. Considering that most of the system operations, short-circuit evaluations, faults and settings of the protection system are dependent of the line parameters, the procedures proposed in this research can significantly improve the reliability and general performance of electrical systems.

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Scientific publications (5)
(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)
CABALLERO, PABLO TORREZ; MARQUES COSTA, EDUARDO C.; KUROKAWA, SERGIO. Fitting the frequency-dependent parameters in the Bergeron line model. Electric Power Systems Research, v. 117, p. 14-20, . (13/00974-5)
MONTEIRO, JOSE HUMBERTO A.; COSTA, EDUARDO COELHO M.; PINTO, ANDRE JINNO G.; KUROKAWA, SERGIO; GATOUS, OMAR MOHAMED O.; PISSOLATO, JOSE. Simplified skin-effect formulation for power transmission lines. IET Science Measurement & Technology, v. 8, n. 2, p. 47-53, . (13/00974-5)
PINTO, ANDRE JINNO G.; COSTA, EDUARDO COELHO M.; KUROKAWA, SERGIO; MONTEIRO, JOSE HUMBERTO A.; DE FRANCO, JORGE LUIZ; PISSOLATO, JOSE. Analysis of the electrical characteristics and surge protection of EHV transmission lines supported by tall towers. INTERNATIONAL JOURNAL OF ELECTRICAL POWER & ENERGY SYSTEMS, v. 57, p. 358-365, . (13/00974-5)
COSTA, EDUARDO COELHO M.; KUROKAWA, SERGIO. Estimation of transmission line parameters using multiple methods. IET GENERATION TRANSMISSION & DISTRIBUTION, v. 9, n. 16, p. 2617-2624, . (13/00974-5)
CABALLERO, PABLO TORREZ; MARQUES COSTA, EDUARDO C.; KUROKAWA, SERGIO. Frequency-dependent multiconductor line model based on the Bergeron method. Electric Power Systems Research, v. 127, p. 314-322, . (13/00974-5, 14/17051-0)

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