TY - JOUR T1 - Power Electronic Transformer-Based Railway Traction Systems: Challenges and Opportunities JO - IEEE Journal of Emerging and Selected Topics in Power Electronics PY - 2017/03/21 AU - Feng J AU - Chu WQ AU - Zhang Z AU - Zhu ZQ ED - DO - DOI: 10.1109/JESTPE.2017.2685464 VL - 5 IS - 3 SP - 1237 EP - 1253 Y2 - 2025/01/03 ER -