A 0.3 MJ SMES magnet of a voltage sag compensation system

To protect an 110 kVA critical load from voltage sags, a SMES-based voltage sag compensator is developed. This system consists of a 0.3 MJ NbTi magnet and a 150 kVA IGBT-based current source converter. The magnet has a solenoidal coil with an inductance of 1.85 H. Its helium-vapor cooled HTS current...

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Veröffentlicht in:	IEEE transactions on applied superconductivity 2004-06, Vol.14 (2), p.717-720
Hauptverfasser:	Jiang, X., Liu, X., Zhu, X., He, Y., Cheng, Z., Ren, X., Chen, Z., Gou, L., Huang, X.
Format:	Artikel
Sprache:	eng
Schlagworte:	Applied sciences Coils Compensation Compensators Convertors Current sources Discharge Electric potential Electrical engineering. Electrical power engineering Electrical machines Electromagnets Electronics Exact sciences and technology Inductance Insulated gate bipolar transistors Niobium compounds Other multijunction devices. Power transistors. Thyristors Power quality Protection Protection systems Sag Samarium Semiconductor electronics. Microelectronics. Optoelectronics. Solid state devices Superconducting magnetic energy storage Titanium compounds Transformers and inductors Various equipment and components Voltage Voltage fluctuations
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Beschreibung
Zusammenfassung:	To protect an 110 kVA critical load from voltage sags, a SMES-based voltage sag compensator is developed. This system consists of a 0.3 MJ NbTi magnet and a 150 kVA IGBT-based current source converter. The magnet has a solenoidal coil with an inductance of 1.85 H. Its helium-vapor cooled HTS current leads are further cooled by liquid nitrogen. A protection system is designed for quenches which would most likely happen during the period of charging or discharging of the magnet when a voltage sag occurs or the voltage supply recovers from a sag. The topology of the main circuit of the compensator is also presented and analyzed.
ISSN:	1051-8223 1558-2515
DOI:	10.1109/TASC.2004.830083