Reference
J. Fu, G. Song, and B. De Schutter, "Influence of measurement uncertainty on
parameter estimation and fault location for transmission lines,"
IEEE Transactions on Automation Science and Engineering, vol.
18, no. 1, pp. 337-345, Jan. 2021.
Abstract
Fault location algorithms for transmission lines use the parameters of the
transmission line to locate faults after the faults have occurred along the
line. Although these parameters can be estimated by the phasor measurement
unit(s) (PMU(s)) at the terminal(s) of the transmission line continuously, the
uncertainty in the measurements will give rise to stochastic errors in the
measured values. Thus, the uncertainty in measurements definitely influences
the estimations of the parameters of the transmission line, which in its turn
influences the results of fault location algorithms. Inaccurate results of
fault location algorithms may lead to costly maintenance fees and prolonged
outage time. Therefore, in this paper, we estimate the parameters of the
transmission line considering the uncertainty in the measurements so that a
more accurate fault location can be derived. The uncertainty in the
measurements will be modeled as a stochastic distribution and the maximum
likelihood estimation (MLE) method will be adopted to reduce the uncertainty in
the measurements. In addition, as an illustration, the telegrapher's equations
will be used to calculate the parameters of the transmission line and the
two-terminals positive sequence network fault location algorithm will be used
to locate the fault. In a simulation case study of a real-life transmission
line the influence of the uncertainty in the measurements on the transmission
line parameter estimations and the effectiveness of the MLE method for
estimations are simulated and analyzed. The results show that the influence of
the uncertainty in the measurements on the positive sequence network fault
location algorithm should not be neglected and that the proposed method is very
effective in significantly reducing the influence of the uncertainty in the
measurements.
Publisher page
Downloads
BibTeX
@article{FuSon:20-007,
author = {Fu, Jianfeng and Song, Guobing and De Schutter, Bart},
title = {Influence of Measurement Uncertainty on Parameter Estimation and
Fault Location for Transmission Lines},
journal = {IEEE Transactions on Automation Science and Engineering},
volume = {18},
number = {1},
pages = {337--345},
month = jan,
year = {2021}
}