TY - GEN
T1 - A High Step-up Ratio DC-DC Converter with Fault Blocking Capability for Offshore Wind Farms
AU - Liu, Jianying
AU - Li, Binbin
AU - Li, Lei
AU - Liu, Xiaofang
AU - Wu, Jian
AU - Xu, Dianguo
AU - Wei, Tianliu
AU - Li, Weiwei
N1 - Publisher Copyright:
© 2021 IEEE.
PY - 2021/5/24
Y1 - 2021/5/24
N2 - Offshore wind farms with internal medium voltage (MV) DC collection buses have become a research hotpot. High voltage (HV) DC-DC converters interconnecting MV DC collection buses and HV DC transmission cables are necessary. Besides, the high cost of operation and maintenance makes fault blocking capability especially important. In this paper, a non-isolated high step-up ratio modular DC-DC converter (HSRM-DC) satisfying this specific condition is proposed, which characterizes high power, low cost and light weight. By blocking gating signals to IGBTs of all sub-modules (SMs) and triggering signals to all thyristors in the HSRM-DC, the rapid rising short-circuit fault current can be blocked within few milliseconds, which protects the HSRM-DC from thermal damage. Corresponding control strategy has been developed and a scaled-down prototype has been built in the laboratory to verify the effectiveness of the proposed HSRM-DC converter topology and its fault blocking capability.
AB - Offshore wind farms with internal medium voltage (MV) DC collection buses have become a research hotpot. High voltage (HV) DC-DC converters interconnecting MV DC collection buses and HV DC transmission cables are necessary. Besides, the high cost of operation and maintenance makes fault blocking capability especially important. In this paper, a non-isolated high step-up ratio modular DC-DC converter (HSRM-DC) satisfying this specific condition is proposed, which characterizes high power, low cost and light weight. By blocking gating signals to IGBTs of all sub-modules (SMs) and triggering signals to all thyristors in the HSRM-DC, the rapid rising short-circuit fault current can be blocked within few milliseconds, which protects the HSRM-DC from thermal damage. Corresponding control strategy has been developed and a scaled-down prototype has been built in the laboratory to verify the effectiveness of the proposed HSRM-DC converter topology and its fault blocking capability.
KW - DC-DC converter
KW - fault current blocking mechanism
KW - high voltage direct current (HVDC)
KW - medium voltage direct current (MVDC)
UR - https://www.scopus.com/pages/publications/85114199377
U2 - 10.1109/ECCE-Asia49820.2021.9479271
DO - 10.1109/ECCE-Asia49820.2021.9479271
M3 - 会议稿件
AN - SCOPUS:85114199377
T3 - Proceedings of the Energy Conversion Congress and Exposition - Asia, ECCE Asia 2021
SP - 702
EP - 707
BT - Proceedings of the Energy Conversion Congress and Exposition - Asia, ECCE Asia 2021
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 12th IEEE Energy Conversion Congress and Exposition - Asia, ECCE Asia 2021
Y2 - 24 May 2021 through 27 May 2021
ER -