Effective application of superconducting magnetic energy storage (SMES) to load leveling for high speed transportation system

• Published in: IEEE transactions on applied superconductivity Vol. 14; no. 2; pp. 713 - 716
• Main Authors: Suzuki, S., Baba, J., Shutoh, K., Masada, E.
• Format: Journal Article Conference Proceeding
• Language: English
• Published: New York, NY IEEE 01.06.2004; Institute of Electrical and Electronics Engineers; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Applied sciences; Batteries; Boundary element method; Costs; Demand; Direct energy conversion and energy accumulation; Electric utilities; Electrical engineering. Electrical power engineering; Electrical machines; Electrical power engineering; Electrochemical conversion: primary and secondary batteries, fuel cells; Exact sciences and technology; Fluctuation; Fluctuations; Frequency; Mathematical analysis; Power demand; Power electronics, power supplies; Power networks and lines; Pulsed power supplies; Rail transportation; Railroads; Railway engineering; Regulation and control; Samarium; Small & medium sized enterprises-SME; Substations; Superconducting magnetic energy storage; Superconductivity; Substation; System configuration; Power demand; hybrid energy storage system; Control system; Flow battery; Rail vehicle; Secondary cell; Power supply; Power electronics; Energy storage system; Low frequency; SMES; Hybrid system; Storage capacity; High speed train; System simulation; Rail transportation; High frequency; Superconducting magnetic energy storage; Combined system; load leveling; Boundary element method; High speed transportation
• ISSN: 1051-8223; 1558-2515
• DOI: 10.1109/TASC.2004.830082

The consecutive pulse power demand of the high speed transportation systems like Shinkansen, gives deteriorative influences to the power supply system and increases its operational costs. To cope with this problem, it has been studied to install the superconducting magnetic energy storage system (SMES) in railway substations. However, the scale of installation becomes too large because of low space factor of SMES, and hampers its realization. Then, it is considered to use SMES only for suppression of the high frequency component of load fluctuation, and to combine with a large capacity battery storage (BEMS), which can not follow fast fluctuation and covers its low frequency component. A novel control scheme of this combined energy storage system is proposed. The fluctuation of power demand caused by high speed train operations in a railway substation is measured separately in the frequency range and used to regulate both SMES and BEMS to suppress fluctuation. With simulation studies based on the load model of high speed train operation at a certain substation, this hybrid approach and its control scheme are verified effective. The system configuration is compact enough to be installed at a substation.