FERNANDES, A. B.; http://lattes.cnpq.br/9817797793360590; FERNANDES, Alécio Barreto.
Abstract:
Phase-domain transmission line computational models are available in
some EMTP-type programs {Electromagnetic Transients Program). These models
overcome the limitations of the modal-domain models implemented in some commercial
EMTP programs for situations in which asymmetry takes place such as unbalanced
overhead lines and underground cables. The current Thesis presents the formulation,
development and implementation of a frequency-dependent multiphase transmission line
model. The following contributions are presented: the transformation matrix is
considered to be complex and frequency-dependent; only one propagation time is needed
to represent the line in the phase-domain; ali the characteristic admittance and
propagation function matrices elements are synthesized at once by low order and
accurate rational functions, directly in the phase-domain. The proposed model is
validated using time-domain digital simulations focusing on computational accuracy and
efficiency.