Title :
Control of autonomous solid oxide fuel cells subject to sudden load variations
Author :
Lee, Dong-Jing ; Wang, Li
Author_Institution :
Dept. of Electr. Eng., Nat. Cheng Kung Univ., Tainan
Abstract :
This paper presents dynamic behaviors of autonomous solid oxide fuel cells (SOFC) with AC bus control. Both voltage and frequency control are utilized to achieve load- sharing of the studied SOFC feeding isolated loads. A DC-to-DC converter is connected to the output terminals of the studied SOFC for stabilizing output voltage and current fluctuations under different loading conditions. The PWM inverter connected to the output terminals of the DC-to-DC converter is operated under voltage-controlled mode to regulate the voltage profile across the connected loads. It can be concluded from the simulation results that the proposed voltage and frequency droop controllers of the PWM inverter may operate satisfactory under stand-alone mode.
Keywords :
DC-DC power convertors; PWM invertors; electric current control; frequency control; fuel cell power plants; solid oxide fuel cells; voltage control; AC bus control; DC-DC converter; autonomous solid oxide fuel cells; current fluctuations; frequency control; voltage control; voltage fluctuations; voltage-controlled mode; DC-DC power converters; Fuel cells; Load management; Power generation; Power system modeling; Pulse width modulation inverters; Solids; Stability; Voltage; Wind turbines; DC-to-DC converter; PWM inverter; solid oxide fuel cells (SOFC); stand-alone mode;
Conference_Titel :
Transmission and Distribution Conference and Exposition, 2008. T&D. IEEE/PES
Conference_Location :
Chicago, IL
Print_ISBN :
978-1-4244-1903-6
Electronic_ISBN :
978-1-4244-1904-3
DOI :
10.1109/TDC.2008.4517298
