Research Paper

Maximum Power Point Tracking With Reactant Flow Optimization of Proton Exchange Membrane Fuel Cell

[+] Author and Article Information
Nabil Karami

e-mail: nabil.karami@lsis.org

Rachid Outbib

e-mail: rachid.outbib@lsis.org
Laboratory of Sciences in Information
and Systems (LSIS),
Aix-Marseille University,
Marseille 13 013, France

Nazih Moubayed

Department of Electricity and Electronics,
Faculty of Engineering 1,
Lebanese University,
Tripoli, Lebanon
e-mail: nmoubayed@ieee.org

Π(x) designates the set of all species at electrode x, i.e., Π(anode) = {H2, vapor (v)} and Π(cathode) = {O2, N2, air (a), vapor (v)}.

1Corresponding author.

Contributed by the Advanced Energy Systems Division of ASME for publication in the Journal of Fuel Cell Science and Technology. Manuscript received May 21, 2013; final manuscript received July 6, 2013; published online August 20, 2013. Editor: Nigel M. Sammes.

J. Fuel Cell Sci. Technol 10(5), 051008 (Aug 20, 2013) (14 pages) Paper No: FC-13-1055; doi: 10.1115/1.4024967 History: Received May 21, 2013; Revised July 06, 2013

In this paper, a fuel cell (FC) maximum power point tracking (MPPT) with fuel flow optimization is presented. The aim of this study is to extract the maximum power from a FC at different fuel flow rates and to protect the FC from over-current and voltage collapse across terminals. The system is composed of a tracker with a buck converter able to change the output impedance of the FC and therefore its power. In order to illustrate our approach, the tracker is simulated by using both static and dynamic FC models to describe the FC response. Simulation results show the behavior of the tracker at different fuel and oxidant flow rates and verify the concept of maximum power tracking.

Copyright © 2013 by ASME
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Fig. 1

FC system scheme with MPPT

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Fig. 2

FC equivalent dynamic circuit model

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Fig. 3

Anode and cathode mass flows

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Fig. 4

Electrode flow model. x ∈ {anode, cathode} and e ∈ Π(x)1

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Fig. 10

Complete system with static FC model

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Fig. 11

Variation of voltage, current, power and duty cycle at (a) 5 lpm, (b) 15 lpm, (c) 23.46 lpm

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Fig. 12

Power and voltage variation versus current at (a) 5 lpm, (b) 15 lpm, (c) 23.46 lpm

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Fig. 5

Power curve and its derivative with respect to IFC

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Fig. 6

Intersection of the curve dVFC/dIFC and the curve VFC/IFC at Iop

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Fig. 7

Block diagram of static FC model with MPPT

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Fig. 8

Block diagram of dynamic FC model with MPPT

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Fig. 20

Control scheme for real application

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Fig. 19

A possible power-tracking error

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Fig. 13

MPPT with fuel flow control

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Fig. 14

Power and voltage at MPP

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Fig. 15

Complete system with a dynamic FC model

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Fig. 16

Dynamic variation of voltage, current, and power at different hydrogen and oxygen flows

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Fig. 17

Power and voltage curves versus current

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Fig. 18

Oscillation of power point over different power curves




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