In this master's thesis we adress the challenges associated with measuring the energy
characteristics of low-temperature proton exchange membrane fuel cells (LT-PEMFC),
where voltage instabilities occur during polarization curve measurements when reactant
stoichiometry is too low. Investigating the origin of these instabilities in the system required
a detailed understanding of the operation of the test station and its components. Measurement
matrices were designed for the systematic variation of PID parameters. By applying PID
control of the reactant pressure, we aimed to eliminate these instabilities, with control
implemented using an EPT and a BPR. The results indicate that selecting parameters KP = 6
in TI = 2 reduces oscillations, while increasing the contact pressure further enhances
operational stability.
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