TY - JOUR
T1 - Redundancy design of modular DC solid-state transformer based on reliability and efficiency evaluation
AU - Li, Yang
AU - Zhang, Yan
AU - Cao, Rui
AU - Liu, Xue
AU - Lv, Chunlin
AU - Liu, Jinjun
N1 - Publisher Copyright:
© 2021 CPSS Transactions on Power Electronics and Applications. All rights reserved.
PY - 2021/6
Y1 - 2021/6
N2 - The modular DC solid-state transformer (DC-SST) is promising but restricted by limited reliability, which can be solved by redundancy. However, current redundancy designs are only based on the reliability evaluation in stable operation condition and seldom efficiency. In this paper, a redundancy design method of DC-SST is proposed considering both reliability and efficiency. The long-term mission profile and aging of power semiconductor devices (PSDs) and capacitors are considered in the reliability evaluation. Based on the result that the capacitor reliability dominates the system reliability, a simplified system reliability model is proposed. Besides, IGBT power loss considering the long-term mission profile is obtained, which dominates the system power loss. Finally, a multi-objective optimization is solved to obtain the optimal redundant number. Feasibility of the proposed method is verified by a prototype.
AB - The modular DC solid-state transformer (DC-SST) is promising but restricted by limited reliability, which can be solved by redundancy. However, current redundancy designs are only based on the reliability evaluation in stable operation condition and seldom efficiency. In this paper, a redundancy design method of DC-SST is proposed considering both reliability and efficiency. The long-term mission profile and aging of power semiconductor devices (PSDs) and capacitors are considered in the reliability evaluation. Based on the result that the capacitor reliability dominates the system reliability, a simplified system reliability model is proposed. Besides, IGBT power loss considering the long-term mission profile is obtained, which dominates the system power loss. Finally, a multi-objective optimization is solved to obtain the optimal redundant number. Feasibility of the proposed method is verified by a prototype.
KW - DC solid-state transformer
KW - Multi-objective optimization
KW - Power loss model
KW - Redundancy design
KW - Reliability evaluation
UR - https://www.scopus.com/pages/publications/85143794503
U2 - 10.24295/CPSSTPEA.2021.00010
DO - 10.24295/CPSSTPEA.2021.00010
M3 - 文章
AN - SCOPUS:85143794503
SN - 2475-742X
VL - 6
SP - 115
EP - 126
JO - CPSS Transactions on Power Electronics and Applications
JF - CPSS Transactions on Power Electronics and Applications
IS - 2
ER -
