20.500.12556/RUL-182692 Raziskave stabilnosti meritev energijskih karakteristik gorivnih celic s protonsko izmenjevalno membrano pri nizkih stehiometrijah reaktantov Investigations into the stability of measurements of energy characteristics of proton exchange membrane fuel cells at low reactant stoichiometries V magistrski nalogi obravnavamo problematiko meritev energijskih karakteristik nizkotemperaturnih gorivnih celic s protonsko izmenjevalno membrano (LT-PEMFC), pri katerih se pri prenizki stehiometriji reaktantov pojavijo nestabilnosti napetosti pri merjenju polarizacijske krivulje. Raziskave nastajanja nestabilnosti v sistemu so zahtevale natančno poznavanje delovanja testne postaje in njenih komponent. Zasnovali smo merilne matrike za sistematično spreminjanje PID parametrov. S PID krmiljenjem tlaka reaktantov smo želeli odpraviti te nestabilnosti, pri čemer je bilo krmiljenje izvedeno z EPT in BPR. Rezultati kažejo, da izbira parametrov KP = 6 in TI = 2 zmanjša oscilacije, povečanje kontaktnega tlaka pa dodatno izboljša stabilnost delovanja. 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. LT-PEMFC PID krmiljenje polarizacijska krivulja tlak reaktantov testna postaja za gorivne celice podjetja Greenlight Innovation LT-PEMFC PID control polarization curve reactant pressure fuel cell test station by Greenlight Innovation true false false [R. Medved] Slovenski jezik Angleški jezik Magistrsko delo/naloga 2026-05-21 08:30:45 2026-05-21 08:30:53 2026-06-01 12:00:56 0000-00-00 00:00:00 2026 0 Ljubljana 0 XX, 66 str. 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 681.5:535.51(043.2) 285602 280000003 46927.pdf 46927.pdf 1 22BCB7897FAEB29F73B908CEF0E5F670 107b1c12b840bebd61210ddfc72b1c242f2a74bd750ccb24eb96fc46eb59f671 4b463e35-54de-11f1-b0ab-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=234171 Fakulteta za strojništvo 0 0 0