Abstract

In 2006, the first Li-ion battery was installed in traction power supply system by West Japan Railway Company and now more than 20 energy storage systems have already installed in traction power supply system in Japan. In this article, the recent trend for regenerative energy utilization is summarized not only in d.c. railway but also a.c. railway. We, East Japan Railway Company, have installed 3 energy storage systems for d.c. railway and one railway static power conditioner for a.c. railway for regenerative energy utilization. The effects of these systems are also shown quantitatively in this paper.

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