A 0.3 MJ SMES magnet of a voltage sag compensation system

Author

Jiang, Xiaohua ; Liu, Xun ; Zhu, Xiaoguang ; He, Yeye ; Cheng, Zhiguang ; Ren, Xiaopeng ; Chen, Zhenmin ; Gou, Luhai ; Huang, Xianrui

Author_Institution

Dept. of Electr. Eng., Tsinghua Univ., Beijing, China

Volume

14

Issue

2

fYear

2004

fDate

6/1/2004 12:00:00 AM

Firstpage

717

Lastpage

720

Abstract

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.

Keywords

compensation; high-temperature superconductors; niobium compounds; power supply quality; power system protection; power system stability; solenoids; superconducting coils; superconducting magnet energy storage; superconducting magnets; 0.3 MJ; 110 kVA; 150 kVA; HTS current lead; IGBT-based current source converter; NbTi; NbTi magnet; SMES magnet; compensator circuit; critical load; helium-vapor cooled HTS current leads; liquid nitrogen cooling; magnet charging; magnet discharging; quench protection system; solenoidal coil; voltage sag compensation system; voltage supply recovery; Coils; Inductance; Insulated gate bipolar transistors; Niobium compounds; Power quality; Protection; Samarium; Superconducting magnetic energy storage; Titanium compounds; Voltage fluctuations; HTS current lead; SMES; quench protection; voltage sag compensation;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/TASC.2004.830083

Filename

1324893