地上用電力貯蔵装置の適用効果向上を目指した制御手法

摘要

Some types of fixed energy storage systems have been applicable to DC electrified railways. However, these systems have a limited capacity in general. If the charge status of the storage media is inappropriate, the charge/ discharge process can no longer be continued depending on the driving status: powering or regenerating of electric rolling stock. We therefore have developed a new control method, by which sufficient and constant power supply to meet the energy need of electric rolling stock is ensured, while the storage media is kept in the middle state of charge in preparation for the next phase of powering or regenerating. A prototype storage system applying the developed control method and electric double layer capacitors (EDLCs) as storage media was built. Tests were performed using a railway test line, electric rolling stock, and the system. It was confirmed that the developed energy storage system could charge or discharge according to powering/regenerating of complicated load.%直流電気鉄道のさらなる省エネルギー化を目的に，電力貯蔵装置の適用と新しい制御手法を提案した。1編成の電車と電気車負荷模擬装置による，電力貯蔵装置の充放電試験を行うことにより，従来の固定電圧制御手法と補充電•補放電制御手法の比較検証を行った。その結果，補充電•補放電制御手法の機能により，充電と放電のバランスを保つことが可能になった。また，有効活用できる電力回生エネルギーの増大，総合効率の向上も確認できた。今後の地上用電力貯蔵装置の導入にあたり，適用効果向上の一助になりうるものと期待される。