Reference
J. Fu, G. Song, and B. De Schutter, "A pilot protection method based on energy
balance for half-wavelength transmission lines,"
Proceedings
of the 15th IEEE International Conference on Automation Science and Engineering
(CASE 2019), Vancouver, Canada, pp. 18-23, Aug. 2019.
Abstract
When the current differential protection is applied to very long transmission
lines such as half-wavelength transmission lines, it suffers from the
distributed capacitive current as well as from low sensitivity in case of a
high-resistance fault. In case of an external fault, the variation of the line
storage energy, the distributed resistance energy loss, and the energy injected
from both ends of the transmission line satisfy the energy balance equation,
and in this case the energy balance is independent of the line length. However,
in case of an internal fault, the energy dissipated by the fault resistance
breaks the energy balance. Based on the theory of energy balances, this paper
proposes a novel pilot protection principle. Compared with the existing
long-distance transmission line protection principles, the proposed pilot
protection principle has the advantage of not being influenced by the
distributed parameters of the long line. A simulation based on EMTDC/PSCAD
illustrates the benefits of the proposed approach.
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BibTeX
@inproceedings{FuSon:19-010,
author = {Fu, Jianfeng and Song, Guobing and De Schutter, Bart},
title = {A Pilot Protection Method Based on Energy Balance for
Half-Wavelength Transmission Lines},
booktitle = {Proceedings of the 15th IEEE International Conference on
Automation Science and Engineering (CASE 2019)},
address = {Vancouver, Canada},
pages = {18--23},
month = aug,
year = {2019}
}