Voltage sags compensation using a superconducting flywheel energy storage system

This paper presents a voltage sag compensator, which uses a flywheel energy storage system with superconducting magnetic axial thrust bearing (SMB) and a permanent magnet radial bearing (PMB). The SMB was built with Nd-Fe-B magnet and YBCO superconducting blocks, refrigerated with liquid Nitrogen. T...

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Veröffentlicht in:	IEEE transactions on applied superconductivity 2005-06, Vol.15 (2), p.2265-2268
Hauptverfasser:	de Andrade, R., Ferreira, A.C., Sotelo, G.G., Neto, J.L.S., Rolim, L.G.B., Suemitsu, W.I., Bessa, M.F., Stephan, R.M., Nicolsky, R.
Format:	Artikel
Sprache:	eng
Schlagworte:	Applied sciences Circuit properties Compensation COPPER OXIDE Direct energy conversion and energy accumulation Electric, optical and optoelectronic circuits Electrical engineering. Electrical power engineering Electrical power engineering Electromagnets Electronic circuits ELECTRONIC PRODUCTS Electronics Energy accumulation Energy storage Exact sciences and technology Ferrous alloys Flywheels high-temperature superconductors IRON ALLOYS (50 TO 99 FE) Magnetic flux Magnetic levitation MAGNETIC MATERIALS Miscellaneous Power quality Reluctance Reluctance machines reluctance motor drives Reluctance motors Signal convertors STORAGE Superconducting magnetic energy storage Superconducting magnets SUPERCONDUCTIVITY SUPERCONDUCTORS Various equipment and components VOLTAGE Voltage fluctuations YTTRIUM OXIDE
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Beschreibung
Zusammenfassung:	This paper presents a voltage sag compensator, which uses a flywheel energy storage system with superconducting magnetic axial thrust bearing (SMB) and a permanent magnet radial bearing (PMB). The SMB was built with Nd-Fe-B magnet and YBCO superconducting blocks, refrigerated with liquid Nitrogen. The magnets are assembled with magnetic flux shapers in order to increase the levitation force and the stiffness. The radial PMB is used to positioning the vertically arranged switched reluctance machine (SRM) used as motor/generator. Simulations of the power electronics and SRM show that the system can work up to 30,000 rpm supplying the required energy during disturbances.
ISSN:	1051-8223 1558-2515
DOI:	10.1109/TASC.2005.849627