@INPROCEEDINGS {11059,
author={A. M. S. Mendes and R. Rocha Rocha and A. J. M. Cardoso},
doi={},
booktitle={IEEE International Electric Machines and Drives Conf.},
title={Analysis of a Railway Power System Based on Four Quadrant Converters Operating Under Faulty Conditions},
year={2011},
month={May},
volume={CDROM},
pages={1-6} 
}