Prado, Afonso Jose do [UNESP]Lessa, Leonardo da Silva [UNESP]Monzani, Rafael CuerdaBovolato, Luiz Fernando [UNESP]Pissolato Filho, Jose2014-12-032014-12-032014-07-01Electric Power Systems Research. Lausanne: Elsevier Science Sa, v. 112, p. 56-64, 2014.0378-7796http://hdl.handle.net/11449/113619Some changes in the application of the numeric trapezoidal integration are analyzed for applications considering pi circuits. It is considered numeric and computational proceedings for improving the numeric results obtained with associations of pi circuits. In numeric integration solutions of the linear systems, it is common to represent these associations of pi circuits by only one matrix. This representation introduces undesirable numeric oscillations in simulations of the dynamics of wave propagation in electrical systems. The proposed changes improve the results of application of cascades of pi circuits associated to the trapezoidal integration, avoiding that the numerical oscillations, or Gibb's oscillations, have high values and are slowly damped. For the carried out simulations, different number of pi circuits and voltage sources are checked, confirming the reduction of the influence of the numeric oscillations on the obtained results. (C) 2014 Elsevier B.V. All rights reserved.56-64engEigenvalues and eigenfuctionsElectromagnetic transient analysesLinear systemsNumerical analysisState space methodsTransmission linesArtigo10.1016/j.epsr.2014.03.006WOS:000336190000008Acesso restrito905011498606590378706478550058200000-0001-5716-6827