Title

Investigating Controller Performance In Hybrid Sofc Systems With Unknown Nonlinearities

Abstract

Solid oxide fuel cells (SOFCs) offer many benefits over various other fuel cells as a result of their high operating temperatures. Our prior work has addressed the conflicting goals of preventing fuel starvation and improving load-following in SOFCs through a combination of current regulation and hybridization with an ultra-capacitor. The associated controllers are largely model independent, excepting certain generalized assumptions that were made about the unknown and nonlinear dynamics of the SOFC's fuel supply system (FSS). In this paper we formulate a generalized structure of the control problem and controller from our earlier work, and relax the conditions imposed on the FSS. Thereafter, we analytically determine conditions of instability. We obtain inequality conditions that impose restrictions on the controller gains and the unknown nonlinearity. The conditions are helpful in predicting the limits of performance of the controller. The results are verified through simulations and through hardware-in-the-loop tests. © 2012 AACC American Automatic Control Council).

Publication Date

1-1-2012

Publication Title

Proceedings of the American Control Conference

Number of Pages

2953-2958

Document Type

Article; Proceedings Paper

Personal Identifier

scopus

DOI Link

https://doi.org/10.1109/acc.2012.6315514

Socpus ID

84869390172 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/84869390172

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