Flatness based control of a dual active bridge converter for a fuel cell application

Based on the properties of flatness system, this paper proposes a nonlinear control for a dual active bridge converter for fuel cell applications. This converter is connected to fuel cell via a diode and an LC low-pass filter. The constraint of fuel cell like the maximum power and current slope are taken into account by means of the control of the energy stored in the filter capacitor corresponding to the fuel cell voltage obtained from its static characteristic. The diode and parasitic resistances are modeled as a series resistance connected to the fuel cell and its value is estimated and is used in the control algorithm. The effectiveness of the proposed system is demonstrated via experimental results.

[1]  Jean-Philippe Martin,et al.  Flatness based control of an isolated three-port bidirectional DC-DC converter for a fuel cell hybrid source , 2011, 2011 IEEE Energy Conversion Congress and Exposition.

[2]  Phatiphat Thounthong,et al.  An Equivalent Circuit Model for Gas Diffusion Layers of PEMFC , 2010 .

[3]  B. Fahimi,et al.  On the impact of fuel cell system response on power electronics converter design , 2006, 2006 IEEE Vehicle Power and Propulsion Conference.

[4]  Stéphane Raël,et al.  New PEMFC behaviour law , 2011 .

[5]  D.M. Divan,et al.  A three-phase soft-switched high power density DC/DC converter for high power applications , 1988, Conference Record of the 1988 IEEE Industry Applications Society Annual Meeting.

[6]  B.H. Cho,et al.  A Dynamic Model of a PEM Fuel Cell System , 2009, 2009 Twenty-Fourth Annual IEEE Applied Power Electronics Conference and Exposition.

[7]  Jean-Philippe Martin,et al.  High Voltage Ratio DC–DC Converter for Fuel-Cell Applications , 2010, IEEE Transactions on Industrial Electronics.

[8]  M. Fliess,et al.  Flatness and defect of non-linear systems: introductory theory and examples , 1995 .