Fixed Energy Storage System and High Voltage System for DC Electrified Railway

Inhalt:
This paper introduces saving energy technologies with fixed energy storage systems (FESS) already issued and a high voltage systems under basic research in Japan. The FESS stores the energy generated during braking and discharges it again when electric multiple-unit (EMU) is powered. The FESS provides emergent compensation if the blackout occurs at substations by earthquake. The high voltage system consists of higher-voltage additional feeders and DC-DC converters in addition to the existing feeding circuit and enables EMU to be applied with conventional-voltage power.