TY - JOUR
T1 - A Composite Finite-Time Controller for Decentralized Power Sharing and Stabilization of Hybrid Fuel Cell/Supercapacitor System with Constant Power Load
AU - Xu, Qianwen
AU - Zhang, Chuanlin
AU - Xu, Zhao
AU - Lin, Pengfeng
AU - Wang, Peng
N1 - Funding Information:
Manuscript received October 25, 2018; revised July 16, 2019, September 9, 2019, and December 1, 2019; accepted January 1, 2020. Date of publication January 23, 2020; date of current version October 30, 2020. This work was supported in part by National Natural Science Foundation of China under Grant 71971183 and Grant 71931003, in part by Wallenberg-NTU Presidential Postdoc Fellowship in Nanyang Technological University, Singapore, in part by the Program for Professor of Special Appointment (Eastern Scholar) at Shanghai Institutions of Higher Learning, and in part by the Natural Science Foundation of Shanghai (NO. 19ZR1420500). (Corresponding author: Zhao Xu.) Q. Xu is with the Department of Electric Power and Energy Systems, KTH Royal Institute of Technology SE-100 44, Stockholm, Sweden (e-mail: [email protected]).
Publisher Copyright:
© 1982-2012 IEEE.
PY - 2021/2
Y1 - 2021/2
N2 - The hybrid fuel cell/supercapacitor (FC/SC) system is a promising onboard power supply system for more electric aircraft (MEA), where system stability is a critical issue due to the high penetration of constant power loads (CPLs) in MEA. This article proposes a composite finite-time controller for decentralized power sharing and stabilization of the hybrid FC/SC system with CPLs. It consists of an integral droop (ID) + finite-time controller for the SC converter and a proportional droop (PD) + finite-time controller for the FC converter. First, the coordination of PD and ID achieves decentralized power sharing between FC and SC such that SC only compensates fast fluctuations and FC provides smooth power at the steady state. Then, a finite-time observer is designed to provide feedforward compensation for the disturbances and enables accurate tracking with fast dynamics. Finally, a composite finite-time controller is constructed following a nonrecursive synthesis procedure with a rigorous large signal stability analysis. The proposed controller guarantees finite-time convergence even under large signal variations and can be easily implemented with a practical gain tuning procedure. Simulations and experiments are conducted to verify the proposed technique.
AB - The hybrid fuel cell/supercapacitor (FC/SC) system is a promising onboard power supply system for more electric aircraft (MEA), where system stability is a critical issue due to the high penetration of constant power loads (CPLs) in MEA. This article proposes a composite finite-time controller for decentralized power sharing and stabilization of the hybrid FC/SC system with CPLs. It consists of an integral droop (ID) + finite-time controller for the SC converter and a proportional droop (PD) + finite-time controller for the FC converter. First, the coordination of PD and ID achieves decentralized power sharing between FC and SC such that SC only compensates fast fluctuations and FC provides smooth power at the steady state. Then, a finite-time observer is designed to provide feedforward compensation for the disturbances and enables accurate tracking with fast dynamics. Finally, a composite finite-time controller is constructed following a nonrecursive synthesis procedure with a rigorous large signal stability analysis. The proposed controller guarantees finite-time convergence even under large signal variations and can be easily implemented with a practical gain tuning procedure. Simulations and experiments are conducted to verify the proposed technique.
KW - constant power load (CPL)
KW - decentralized
KW - hybrid fuel cell (FC)/supercapacitor (SC) system
KW - large signal stability
KW - More electric aircraft (MEA)
UR - http://www.scopus.com/inward/record.url?scp=85095813651&partnerID=8YFLogxK
U2 - 10.1109/TIE.2020.2967660
DO - 10.1109/TIE.2020.2967660
M3 - Journal article
AN - SCOPUS:85095813651
SN - 0278-0046
VL - 68
SP - 1388
EP - 1400
JO - IEEE Transactions on Industrial Electronics
JF - IEEE Transactions on Industrial Electronics
IS - 2
M1 - 8967228
ER -