Hirotaka Takahashi
Transportation Systems Integration Dept., Transportation Systems Div., Industrial Systems., Hitachi, Ltd.
Tetsuya Kato
Power Electronics Design Dept, Information & Control Systems Div., Information & Telecommunication Systems, Hitachi, Ltd.
Tomomichi Ito
Power Electronics Systems Unit, Advanced Inverter System R&D Center, Hitachi Research Laboratory, Hitachi, Ltd.
Fujio Gunji
Transportation Substation Systems Engineering Section, Industrial Systems Supervisory Dept., Kokubu Engineering & Product Div., Hitachi Works, Power Systems, Hitachi, Ltd.
Environmental considerations have been factored into the development of traction power supply systems in the past, but growing concerns about global warming call for even more innovative environmentally friendly system solutions. Now Hitachi, Ltd. has developed a novel regenerative power management system that efficiently uses stored regenerative train energy by adopting the same lithium-ion batteries used in hybrid drive vehicles, and the system is now poised for practical deployment. The system mitigates voltage drop across the feeder problems with the stored energy when trains are powered, and also effectively reduces peak power demand. A traction power simulator is used to access and configure the optimum system before the regenerative power management system is actually deployed.
Energy storage, Traction power supply system, Regenerative power, Peak cut
