Asti, G. A. [UNESP]Kurokawa, S. [UNESP]Costa, E. C MPissolato, J.2014-05-272014-05-272011-12-09IEEE Power and Energy Society General Meeting.1944-99251944-9933http://hdl.handle.net/11449/73057The objective of this paper is to show a methodology to estimate the longitudinal parameters of transmission lines. The method is based on the modal analysis theory and developed from the currents and voltages measured at the sending and receiving ends of the line. Another proposal is to estimate the line impedance in function of the real-time load apparent power and power factor. The procedure is applied for a non-transposed 440 kV three-phase line. © 2011 IEEE.engParameters estimationTransmission line modelingTransmission linesAnalysis theoryApparent powerCurrents and voltagesLine impedancePower factorsReal-time estimationThree-phase linesTransmission lineTransmission line impedanceElectric linesElectric power factorElectric utilitiesEstimationModal analysisTransmission line theoryTrabalho apresentado em evento10.1109/PES.2011.6038983WOS:000297469600097Acesso aberto2-s2.0-828551715044830845230549223