期刊
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
卷 45, 期 40, 页码 20659-20672出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijhydene.2020.02.061
关键词
Control-oriented model; Solid oxide fuel cell; Parameter tuning; Stability analysis
资金
- ACCIO (Operational Program FEDER Catalunya 2014-2020) through the REFER project [COMRDI15-1-0036-11]
- Spanish national project DOVELAR [RTI2018-096001-B-C32]
- Spanish State Research Agency through the Maria de Maeztu Seal of Excellence [MDM-2016-0656]
- AGAUR of Generalitat de Catalunya through the Advanced Control Systems (SAC) group grant [2017 SGR 482]
- Chinese Scholarship Council (CSC) [201808390007]
- National Natural Science Foundation of China [61922037]
In this paper, a control-oriented model of a solid oxide fuel cell system is formulated and analyzed in detail. First, a lumped model based on first principle laws is formulated and tuned using experimental data coming from a real solid oxide fuel cell system test bench. The model calibration is carried out based on an optimization approach to minimize the error between the experimental data and the model one. To systematically analyze the system behavior, an equilibrium point analysis is formulated and developed. The analysis results show the maximum steady-state electrical power under each constant stack temperature. This will allow to appropriately select operation points during the system operation. Secondly, Lyapunov's theory is used to characterize the local stability of the equilibrium points. The results show that the equilibrium points are locally stable. Besides, comparison between the initial nonlinear model with the linearized model is performed to show the efficacy of the linearised model analysis. Finally, the frequency response of the linearized model is performed. This analysis provides key information about control system design in order to efficiently operate the solid oxide fuel cell system. (C) 2020 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.
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