Research purposes: In the monopolar ground circuit operation mode of DC transmission system, the DC grounding electrode of the Ultra High Voltage Direct Current(UHVDC)will form a constant DC current field in the ground, causing the DC current in the ground flowing into the high-speed rail integrated grounding system through the grounding point, and then affect other parts of the high-speed rail. In order to investigate the impact of UHVDC grounding electrodes on the integrated grounding system of high-speed railways, this paper uses CDEGS software to model the integrated grounding system of high-speed railway bridge sections, and obtains the distribution of potential and DC current along the grounding system of high-speed railway bridge sections.
Research conclusions: (1) The local DC model established by CDEGS software for high-speed rail bridge sections provides a powerful tool for investigating the internal voltage and current distribution of the high-speed rail integrated grounding system, and also gives ideas for DC modeling for other large facilities. (2) The research results are helpful to improve the construction level of UHVDC and high-speed railway projects, and provide theoretical basis for its long-term planning and site selection.
Key words
DC ground electrode /
high-speed railway /
integrated grounding system /
CDEGS
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References
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