Title :
Voltage sags compensation using a superconducting flywheel energy storage system
Author :
De Andrade, Rubens, Jr. ; Ferreira, Antonio C. ; Sotelo, Guilherme G. ; Neto, José L Silva ; Rolim, Luiz G B ; Suemitsu, Walter I. ; Bessa, Mírcio F. ; Stephan, Richard M. ; Nicolsky, Roberto
Author_Institution :
Fed. Univ. of Rio de Janeiro, Brazil
fDate :
6/1/2005 12:00:00 AM
Abstract :
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.
Keywords :
barium compounds; boron; flywheels; high-temperature superconductors; iron alloys; magnetic bearings; magnetic flux; magnetic levitation; neodymium alloys; permanent magnets; reluctance motor drives; ytterbium compounds; NdFeB; PMB; SMB; SRM; YBCO superconducting blocks; YBa2Cu3O7; generator; high-temperature superconductors; liquid nitrogen; magnetic flux shapers; magnetic levitation force; magnetic stiffness; permanent magnet radial bearing; power electronics; reluctance motor drives; superconducting flywheel energy storage system; superconducting magnetic axial thrust bearing; switched reluctance machine; voltage sag compensator; Energy storage; Flywheels; Magnetic flux; Magnetic levitation; Power quality; Reluctance machines; Reluctance motors; Superconducting magnetic energy storage; Superconducting magnets; Voltage fluctuations; Flywheels; high-temperature superconductors; magnetic levitation; reluctance motor drives;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
DOI :
10.1109/TASC.2005.849627
