交流架線式蓄電池電車のための主回路システムの開発と評価

摘要

Battery powered trains have been developed for further energy saving and less maintenance. We have developed a battery-powered and AC-fed hybrid train, series BEC819, loaded with the lithium-ion battery system of 360-kW large capacity and 1598-V high voltage. This train started commercial operation in Oct. 2016, on AC-electrified Chikuho main line and non-electrified Wakamatsu line. In this paper, we describe characteristics and important design aspect of the BEC819's traction circuit, focusing on electrical protection and cooling performance of the battery, in comparison with the previously developed test train, series 817. Then, evaluation of the traction circuit is presented based on the running test conducted before the revenue operation.%交流架線式蓄電池電車BEC819系「DENCHA」の主回路システムを開発し，営業走行に向けた性能評価を行った。主回路の特徴と性能評価結果の要点を以下に記す。(1) BEC819系の蓄電池は，長寿命と非常時のェネルギー余裕を確保するため，360kWhの大容量とした。(2) 1598Vの高電圧蓄電池を直流リンク部に直結する主回路構成とし，蓄電池短絡対策として複数の中間ヒユー ズを蓄電池箱内に配置した。