Abstract
The transient surge measurements at the changeover sections of Shinkansen power feeding system were carried out in some substations and sectioning posts. The detail of the surge voltage phenomena was investigated and the reason of the frequent discharge of the lightning arrester was clarified. As one of the solutions to avoid such a severe transient phenomena, a novel power supply system for a changeover section substitution for the conventional system with a pair of the vacuum switchgear was proposed. To realize a stable running through the changeover section where two power sources with phase difference are faced, some special control methods were introduced and their validities are confirmed by not only the computer simulations but also the mini-model experiments.
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