On-line Measuring Method of Power Frequency Impedance Parameters for Asymmetric Transmission Lines
Ranchen Yang, Xuan Yao, Weichen Yang
Available Online June 2016.
- https://doi.org/10.2991/mmebc-16.2016.150How to use a DOI?
- online measurement, asymmetric transmission lines, power frequency impedance parameters, least squares method, simulation
- 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.
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 -