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Fault location in series capacitor compensated three-terminal transmission
lines based on the analysis of voltage and current phasor equations and
asynchronous data transfer
Article in Electric Power Systems Research · October 2020
DOI: 10.1016/j.epsr.2020.106457
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Alireza Saffarian Mahyar Abasi
Shahid Chamran University of Ahvaz Shahid Chamran University of Ahvaz
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Fault location in series capacitor compensated three-terminal
transmission lines based on the analysis of voltage and current
phasor equations and asynchronous data transfer
Alireza Saffarian*, Mahyar Abasi
Department of Electrical Engineering, Faculty of Engineering, Shahid Chamran University of
Ahvaz, Ahvaz 61357-43337, Iran
*
Corresponding author.
E-mail address: a.saffarian@scu.ac.ir (A. Saffarian).
Electric Power Systems Research 187 (2020) 106457
https://doi.org/10.1016/j.epsr.2020.106457
Accepted 7 June 2020 in Electric Power Systems Research
ISSN: 0378-7796/ © 2020 Elsevier
Abstract:
In this study, a new algorithm for fault location in series capacitor compensated three-terminal
transmission lines using the distributed line model is proposed. The proposed algorithm uses the
sampled data of currents and voltages of all the three terminals, which are transferred
asynchronously using telecommunication lines. All data transmission delays are calculated in
terms of line parameters as well as the measured values of currents and voltages of the three
terminals. Based on the data received from the three terminals, current and voltage equations of
different points of the network are constituted for different types of faults. By solving these
equations according to their boundary conditions, accurate locations of faults are estimated. One
of the salient features of the suggested algorithm is that the schemed equations are independent of
the model of the series capacitor compensator during fault occurrence and its protective circuitry.
Also, based on the sensitivity analyses performed in this paper, the presented algorithm works
perfectly against the errors caused by measurements and parameters. The test system and the
suggested algorithm were realized in MATLAB environment. The obtained simulation results for
different fault types occurring in various places in the line verify the accurate performance of the
algorithm.
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