Volume 03: Proceedings of 11th International Conference on Applied Energy, Part 2, Sweden, 2019

Phase Differential Protection of Voltage Fault Component for Half-Wavelength Transmission Line Yanxia Zhang, Zhihai Lin, Jian Wang, Haidong Wang, Yuqing Chang


The distribution of voltage and current along the half-wavelength transmission line presents a non-linear fluctuation characteristic, which is quite different from those along the traditional ultra-high voltage (UHV) transmission line. In this paper, the influence factors of the voltage phase difference between two ends of the half-wavelength transmission line are analyzed. The characteristics of the voltage fault component phase difference between two ends of the line are studied when internal and external faults occur, a phase differential protection for half-wavelength transmission line is proposed.

Keywords Half-wavelength AC transmission, Fault component, Phase differential protection, transmission equations of transmission line

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