TY - GEN
T1 - Control of Direct AC/AC Modular Multilevel Converter in Railway Power Supply System
AU - Song, Shuguang
AU - Liu, Jinjun
AU - Ouyang, Shaodi
AU - Chen, Xingxing
AU - Liu, Baojin
N1 - Publisher Copyright:
© 2018 IEEJ Industry Application Society.
PY - 2018/10/22
Y1 - 2018/10/22
N2 - In the railway power supply system, the direct three-to-single phase AC/AC Modular Multilevel Converter (MMC) has received lots of attention due to its salient features compared to the traditional traction transformers. Recent researches mainly focus on the single-phase side 16.7Hz situation, and the single-phase side 50Hz case has not been detailed discussed. In this paper, the authors firstly establish the steady-state model of MMC, and derive the expression of capacitor voltage variation in Submodules (SMs). The severe voltage imbalance between upper- and lower- arms is observed in the analysis when MMC operates at single-phase side 50Hz condition. To eliminate this threat and ensure safe operation of MMC, the high-frequency voltage and current injection method is applied, which effectively balance the voltage between upper- and lower-arms. The overall control and different levels of capacitor voltage control are presented in details. Simulation result in PSCAD/EMTDC software environment verifies the effectiveness of arm voltage balance method.
AB - In the railway power supply system, the direct three-to-single phase AC/AC Modular Multilevel Converter (MMC) has received lots of attention due to its salient features compared to the traditional traction transformers. Recent researches mainly focus on the single-phase side 16.7Hz situation, and the single-phase side 50Hz case has not been detailed discussed. In this paper, the authors firstly establish the steady-state model of MMC, and derive the expression of capacitor voltage variation in Submodules (SMs). The severe voltage imbalance between upper- and lower- arms is observed in the analysis when MMC operates at single-phase side 50Hz condition. To eliminate this threat and ensure safe operation of MMC, the high-frequency voltage and current injection method is applied, which effectively balance the voltage between upper- and lower-arms. The overall control and different levels of capacitor voltage control are presented in details. Simulation result in PSCAD/EMTDC software environment verifies the effectiveness of arm voltage balance method.
KW - AC/AC
KW - Modular Multilevel Converter
KW - Steady-state analysis
KW - Voltage Regualtion
UR - https://www.scopus.com/pages/publications/85057334599
U2 - 10.23919/IPEC.2018.8508001
DO - 10.23919/IPEC.2018.8508001
M3 - 会议稿件
AN - SCOPUS:85057334599
T3 - 2018 International Power Electronics Conference, IPEC-Niigata - ECCE Asia 2018
SP - 1051
EP - 1055
BT - 2018 International Power Electronics Conference, IPEC-Niigata - ECCE Asia 2018
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 8th International Power Electronics Conference, IPEC-Niigata - ECCE Asia 2018
Y2 - 20 May 2018 through 24 May 2018
ER -