Title :
Circuit model of transformers windings using vector fitting, for frequency response analysis (FRA) PART II: Core influence
Author :
Alvarez, David L. ; Rosero, Javier A. ; Mombello, Enrique E.
Author_Institution :
EM&D. Dept. de Ing. Electr. y Electron., Univ. Nac. de Colombia, Edificio, Colombia
Abstract :
In this work the voltage distribution in transformers windings is calculated using equivalent circuit with constants elements that are able to model the frequency dependence. FEM is used to estimate resistances and inductances of equivalent circuit in relation with frequency. The behaviour of R and L are approximate to rational functions with Vector Fitting algorithm with the aim of determinate the elements of the equivalent circuit. For represent the core is used complex permeability that helps to reduce the simulation complexity.
Keywords :
electric resistance; equivalent circuits; frequency response; inductance; permeability; transformer windings; voltage distribution; FEM; FRA; circuit model; complex permeability; equivalent circuit; frequency dependence; frequency response analysis; inductance estimation; resistance estimation; simulation complexity; transformer winding; vector fitting algorithm; voltage distribution; Equations; Integrated circuit modeling; Mathematical model; Permeability; Transformer cores; Windings; Complex Permeability; Equivalent Circuit; Finite Elements Method FEM; Frequency Response Analysis FRA; Transformer; Vector Fitting;
Conference_Titel :
Power Electronics and Power Quality Applications (PEPQA), 2013 Workshop on
Conference_Location :
Bogota
DOI :
10.1109/PEPQA.2013.6614962
