Abstract
To build the hybrid energy transmission line with the HTS cables and liquid hydrogen pipelines is one of the solutions to the carbon emission problem. However, geomagnetic storms caused by solar wind can generate Geomagnetic Induced Current (GIC) and Pipe-Soil Potentials (PSP) offset in hydrogen-electricity hybrid transmission line, which will threaten the safe operation of the hybrid energy system. In order to evaluate GIC and PSP effects of hydrogen-electricity hybrid transmission line accurately, the mechanism of GIC generation in hydrogen-electricity hybrid transmission line is researched in this paper based on the structure of hydrogen-electricity hybrid transmission line and the occurrence process of geomagnetic storm. Then, the GIC calculation model of buried transmission line is established according to the Distributed Source Transmission Line (DSTL) theory. Finally, an example analysis is carried out, the calculation results are verified using the monitoring data, the influence of GIC on the hydrogen-electricity hybrid transmission line is recognized, and two prevention methods of GIC effect are obtained.
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