Sliding mode control of electric power system comprised of fuel cells, DC-DC boost converters and ultracapacitors

Author

Ashok, Roshini S. ; Shtessel, Yuri B. ; Smith, James E.

Author_Institution

Univ. of Alabama in Huntsville, Huntsville, AL, USA

fYear

2013

fDate

4-7 April 2013

Firstpage

1

Lastpage

6

Abstract

The paper deals with controlling autonomous electric power system that comprises Proton Exchange Membrane fuel cell (PEMFC) that is considered as a primary source of electrical energy, the DC-DC boost power converter, and the ultracapacitor. System´s PEMFC/ultracapacitor/DCDC boost power converter zero dynamics are analyzed and appeared to be stable. Relative degree approach is applied for direct control of the output load voltage as well as the fuel cell and ultracapacitor current in the presence of the model uncertainties. The adaptive gain super-twisting sliding mode controller controls the current in PEMFC. The decoupled traditional SMCs are designed for controlling the output voltage and the fast component of the load current that is commanded to the ultracapacitor. The efficacy and robustness of the proposed three-fold SMC and 2-SMC adaptive-gain controllers are confirmed via computer simulations.

Keywords

DC-DC power convertors; power systems; proton exchange membrane fuel cells; robust control; supercapacitors; variable structure systems; 2-SMC adaptive-gain controllers; DCDC boost power converter zero dynamics; PEMFC; Relative degree approach; adaptive gain super-twisting sliding mode controller; autonomous electric power system; output load voltage; proton exchange membrane fuel cell; three-fold SMC; ultracapacitors; Control systems; Fuel cells; Mathematical model; Power system dynamics; Supercapacitors; Voltage control;

fLanguage

English

Publisher

ieee

Conference_Titel

Southeastcon, 2013 Proceedings of IEEE

Conference_Location

Jacksonville, FL

ISSN

1091-0050

Print_ISBN

978-1-4799-0052-7

Type

conf

DOI

10.1109/SECON.2013.6567410

Filename

6567410