Proceedings of the 2016 6th International Conference on Machinery, Materials, Environment, Biotechnology and Computer

On-line Measuring Method of Power Frequency Impedance Parameters for Asymmetric Transmission Lines

Authors
Ranchen Yang, Xuan Yao, Weichen Yang
Corresponding Author
Ranchen Yang
Available Online June 2016.
DOI
https://doi.org/10.2991/mmebc-16.2016.150How to use a DOI?
Keywords
online measurement, asymmetric transmission lines, power frequency impedance parameters, least squares method, simulation
Abstract
Traditional off-line line parameters measuring is complicated in operation and has poor applicability. And the symmetry of line parameters influences the choice of on-line measurement methods. Generally, it's is asymmetric. Therefore, the paper proposes an on-line measuring method of power frequency impedance parameters for asymmetric transmission lines. First, three-phase unbalanced transmission line model are built and power frequency impedance parameters calculation equations are obtained. The equations are underdetermined and have no specific solutions. By changing the line topology, multiple measurement are preformed and plenty sets of data are obtained. Then after adopting the least squares method in complex domain, the exact solutions are finally derived. The simulation results show that the errors of zero sequence impedance mode and impedance angle reach-0.2501% and 0.1533% respectively, the errors of positive sequence impedance mode and impedance angle reach -0.1974% and 0.1011% respectively, far less than the error requirement of practical engineering. The method in this paper is of high accuracy, which can provide a theoretical basis for three-phase unbalanced transmission line parameters on-line measurements.
Open Access
This is an open access article distributed under the CC BY-NC license.

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Proceedings
2016 6th International Conference on Machinery, Materials, Environment, Biotechnology and Computer
Part of series
Advances in Engineering Research
Publication Date
June 2016
ISBN
978-94-6252-210-7
ISSN
2352-5401
DOI
https://doi.org/10.2991/mmebc-16.2016.150How to use a DOI?
Open Access
This is an open access article distributed under the CC BY-NC license.

Cite this article

TY  - CONF
AU  - Ranchen Yang
AU  - Xuan Yao
AU  - Weichen Yang
PY  - 2016/06
DA  - 2016/06
TI  - On-line Measuring Method of Power Frequency Impedance Parameters for Asymmetric Transmission Lines
BT  - 2016 6th International Conference on Machinery, Materials, Environment, Biotechnology and Computer
PB  - Atlantis Press
SP  - 710
EP  - 713
SN  - 2352-5401
UR  - https://doi.org/10.2991/mmebc-16.2016.150
DO  - https://doi.org/10.2991/mmebc-16.2016.150
ID  - Yang2016/06
ER  -