An optimization and fast load-oriented control for current-based solid oxide fuel cell system

An optimization and fast load-oriented control for current-based solid oxide fuel cell system One of the key problems for a solid oxide fuel cell (SOFC), which is a high-temperature power-generation plant, is the cooperative control of safe operation and system efficiency during load tracking. Within the constraints of thermal safety, the SOFC plant should have the maximum output efficiency under various static conditions. Moreover, the SOFC system can switch between different static working conditions smoothly, safely, and quickly when the external load power changes. To achieve cooperative thermoelectric control, taking a 5-kW stand-alone SOFC system as the research object, according to the optimal static strategy designed based on the optimal operating curves (OOCs), a sliding mode controller (SMC) is designed and the closed-loop responses are discussed for SOFC system power switching during load tracking. The identification results demonstrate that the electrical coupling dynamic model can depict and predict accurately the electrical characteristics of SOFC stacks. And based on the obtained OOCs, the thermoelectric control can be achieved and thermal safety ensured using the designed SMC. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Journal of Solid State Electrochemistry Springer Journals

An optimization and fast load-oriented control for current-based solid oxide fuel cell system

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Publisher
Springer Journals
Copyright
Copyright © 2018 by Springer-Verlag GmbH Germany, part of Springer Nature
Subject
Chemistry; Physical Chemistry; Electrochemistry; Energy Storage; Characterization and Evaluation of Materials; Analytical Chemistry; Condensed Matter Physics
ISSN
1432-8488
eISSN
1433-0768
D.O.I.
10.1007/s10008-018-3996-x
Publisher site
See Article on Publisher Site

Abstract

One of the key problems for a solid oxide fuel cell (SOFC), which is a high-temperature power-generation plant, is the cooperative control of safe operation and system efficiency during load tracking. Within the constraints of thermal safety, the SOFC plant should have the maximum output efficiency under various static conditions. Moreover, the SOFC system can switch between different static working conditions smoothly, safely, and quickly when the external load power changes. To achieve cooperative thermoelectric control, taking a 5-kW stand-alone SOFC system as the research object, according to the optimal static strategy designed based on the optimal operating curves (OOCs), a sliding mode controller (SMC) is designed and the closed-loop responses are discussed for SOFC system power switching during load tracking. The identification results demonstrate that the electrical coupling dynamic model can depict and predict accurately the electrical characteristics of SOFC stacks. And based on the obtained OOCs, the thermoelectric control can be achieved and thermal safety ensured using the designed SMC.

Journal

Journal of Solid State ElectrochemistrySpringer Journals

Published: May 31, 2018

References

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