Title :
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
Abstract :
The paper deals with controlling an 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/DC-DC 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 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-SM adaptive-gain controllers are confirmed via computer simulations.
Keywords :
DC-DC power convertors; adaptive control; control system synthesis; electric current control; power system control; proton exchange membrane fuel cells; supercapacitors; variable structure systems; voltage control; 2-SM adaptive-gain controllers; DC-DC boost power converter; PEMFC; autonomous electric power system; computer simulations; electrical energy; load current control; model uncertainties; output load voltage direct control; proton exchange membrane fuel cell; relative degree approach; sliding mode control; three-fold SMC; ultracapacitors; Fuel cells; Inductance; Mathematical model; Power system dynamics; Supercapacitors; Voltage control;
Conference_Titel :
American Control Conference (ACC), 2013
Conference_Location :
Washington, DC
Print_ISBN :
978-1-4799-0177-7
DOI :
10.1109/ACC.2013.6580741
