Research Information System
Journal of Engineering Research and Applied Science, vol.13, no.1, pp.2515-2520, 2024 (Peer-Reviewed Journal)
Modeling of transmission lines in electrical power systems
is very important for power system engineering.Conventional methods for
transmission line parameterdeterminationtake into account
numerousfactors. It is
not applicable in
most cases to use
all the factors
for parameter identification. PMU based
methods, an innovative
approach compared to the
conventional methods, use
synchrophasor voltage/current
measurements from the both ends of the transmission line.In case of using PMU-based
methods, transposition of transmission
line gainsimportancein determining
line parameters.Positive or
negative sequence impedance
parameters can be
estimated accurately for a transposed
transmission line. However,
positive sequence model-based methods give rise to erroneous parameter
estimationsfor an untransposed transmission line which is frequently
encountered in practice. Therefore, three different PMU based methods are
examinedin case of transposed or untransposed line with balanced and unbalanced
load.
Keywords: transmission line parameter, synchrophasor
measurement, PMU, estimation method, transposition