PEMFC system efficiency optimisation through model based control strategies

Grasser, F.; Rufer, A.

doi:10.1109/vppc.2006.364325

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2007

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Cited by 5 publications

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“…This provides an additional element in a control oriented fuel cell system model that has not been addressed in literature so far. The resulting system model can then be used as a basis for developing advanced fuel cell system controllers or to implement real-time maximum efficiency point tracking algorithms [32].…”

Section: Contributionsmentioning

confidence: 99%

An Analytical, Control-Oriented State Space Model for a PEM Fuel Cell System

Grasser

Rufer

2007

2007 Power Conversion Conference - Nagoya

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Section: Contributionsmentioning

confidence: 99%

An Analytical, Control-Oriented State Space Model for a PEM Fuel Cell System

Grasser

Rufer

2007

2007 Power Conversion Conference - Nagoya

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Air supply control for maximum efficiency point tracking in fuel cell systems

Zahedi¹

2012

Journal of Renewable and Sustainable Energy

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The efficiency of the fuel cell system nonlinearly depends on operating conditions and the air flow supplied to the fuel cell system is one of the most significant factors in determining the efficiency. The conventional method of controlling the air flow is to stabilize the oxygen supply at a predetermined constant rate for the optimal efficiency. However, in practice, the optimal point can deviate from the pre-set value due to the varying operating conditions, such as the uncontrollable load. Therefore, the maximum efficiency point tracking (MEPT) controller is necessary to maintain the optimal efficiency over a broad range of operating conditions. In this paper, the MEPT controller is designed based on the extremum seeking control algorithm for searching the optimal oxygen excess ratio in real time to maximize the efficiency of the fuel cell system. Simulation was conducted in the MATLAB/SIMULINK environment and the results demonstrate that the proposed control method is able to track the maximum efficiency point when variations in operating conditions occur.

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