TY - JOUR
T1 - Power Routing Method Based on Optimization Problem to Improve CHB-DAB Lifetime
AU - Yang, Danni
AU - Zhang, Yan
AU - Li, Yang
AU - Liu, Xue
AU - Li, Zhenchao
AU - Liu, Jinjun
AU - Jiang, Xinsheng
N1 - Publisher Copyright:
© 2013 IEEE.
PY - 2023/10/1
Y1 - 2023/10/1
N2 - Smart transformer (ST) used in distribution system can connect dc links and provide grid services; however, high maintenance cost limits its availability. Therefore, this article aims to improve the lifetime of the ST with the cascaded H bridge-dual active bridge (CHB-DAB) structure and extend the maintenance interval. Power routing (PR) is applied to centralize the lifetime of building blocks by controlling the power flowing through them. The damage evaluation results after considering capacitor show that it is the dominant factor of damage. Therefore, different from previous studies, this article adopts unbalanced dc-side voltage of CHB for PR. In addition, because the traditional virtual resistor (VR) method cannot deal with the boundary conditions, such as overvoltage and overload limitation, a general controller based on optimization problem is proposed in this article to solve this. The effectiveness of the proposed control strategy and the control effect of the proposed universal controller are verified by simulation, and the feasibility of PR under the proposed control strategy is proved by experiments.
AB - Smart transformer (ST) used in distribution system can connect dc links and provide grid services; however, high maintenance cost limits its availability. Therefore, this article aims to improve the lifetime of the ST with the cascaded H bridge-dual active bridge (CHB-DAB) structure and extend the maintenance interval. Power routing (PR) is applied to centralize the lifetime of building blocks by controlling the power flowing through them. The damage evaluation results after considering capacitor show that it is the dominant factor of damage. Therefore, different from previous studies, this article adopts unbalanced dc-side voltage of CHB for PR. In addition, because the traditional virtual resistor (VR) method cannot deal with the boundary conditions, such as overvoltage and overload limitation, a general controller based on optimization problem is proposed in this article to solve this. The effectiveness of the proposed control strategy and the control effect of the proposed universal controller are verified by simulation, and the feasibility of PR under the proposed control strategy is proved by experiments.
KW - Capacitor
KW - cascaded H bridge-dual active bridge (CHB-DAB)
KW - optimization problem
KW - power routing (PR)
KW - reliability evaluation
KW - universal controller
UR - https://www.scopus.com/pages/publications/85168714495
U2 - 10.1109/JESTPE.2023.3306156
DO - 10.1109/JESTPE.2023.3306156
M3 - 文章
AN - SCOPUS:85168714495
SN - 2168-6777
VL - 11
SP - 5354
EP - 5363
JO - IEEE Journal of Emerging and Selected Topics in Power Electronics
JF - IEEE Journal of Emerging and Selected Topics in Power Electronics
IS - 5
ER -