This paper compares the impacts of the voltage and current control modes of the fuel cell power generation system on the operating state of the fuel cell. Combined with the requirements for optimizing the efficiency of the fuel cell system
a voltage control mode that can achieve optimal efficiency tracking is proposed. Meanwhile
it solves the problems of accelerated aging when the fuel cell operates in the concentration polarization region and the excessive complexity of the traditional maximum efficiency optimization algorithm. Through simulation analysis
it is verified that the control method under the constant voltage mode can automatically adjust the oxygen excess ratio according to the real-time changes in the required net power of the PEMFC system. Moreover
under the working conditions with large dynamic changes in the load current
it can meet the performance index requirements of the optimal efficiency and improve the operating efficiency and stability of the system.
YU Y, YUAN X Z, LI H, et al.Current mapping of a proton exchange membrane fuel cell with a segmented current collector during the gas starvation and shutdown processes[J]. International journal of hydrogen energy, 2012, 37(20): 15288-15300.
GERARD M, POIROT-CROUVEZIER J P, HISSEL D, et al. Oxygen starvation analysis during air feeding faults in PEMFC[J]. International journal of hydrogen energy, 2010, 35(22): 12295-12307.
YOUSFI-STEINER N, MOÇOTÉGUY P, CANDUSSO D, et al. A review on polymer electrolyte membrane fuel cell catalyst degradation and starvation issues: causes, consequences and diagnostic for mitigation[J]. Journal of power sources, 2009, 194(1): 130-145.
PATTERSON T W, DARLING R M.Damage to the cathode catalyst of a PEM fuel cell caused by localized fuel starvation[J]. Electrochemical and solid-state letters, 2006, 9(4): A183.
BAUMGARTNER W R R, BAUMGARTNER W R R, WALLNÖFER E, et al. Electrocatalytic corrosion of carbon support in PEMFC at fuel starvation[J]. ECS transactions, 2006, 3(1): 811-825.
LIANG D, SHEN Q, HOU M, et al.Study of the cell reversal process of large area proton exchange membrane fuel cells under fuel starvation[J]. Journal of power sources, 2009, 194(2): 847-853.
LI Q, YANG W Y, YIN L Z, et al.Real-time implementation of maximum net power strategy based on sliding mode variable structure control for proton-exchange membrane fuel cell system[J]. IEEE transactions on transportation electrification, 2020, 6(1): 288-297.
JIA F, TIAN X D, LIU F F, et al.Oxidant starvation under various operating conditions on local and transient performance of proton exchange membrane fuel cells[J]. Applied energy, 2023, 331: 120412.
WALLNÖFER-OGRIS E, POIMER F, KÖLL R, et al. Main degradation mechanisms of polymer electrolyte membrane fuel cell stacks:mechanisms, influencing factors, consequences, and mitigation strategies[J]. International journal of hydrogen energy, 2024, 50: 1159-1182.
SABAWA J P, BANDARENKA A S.Investigation of degradation mechanisms in PEM fuel cells caused by low-temperature cycles[J]. International journal of hydrogen energy, 2021, 46(29): 15951-15964.
WEI T, SONG W, YANG X K, et al.Degradation behavior of proton exchange membrane fuel cells under hydrogen starvation in freezing conditions[J]. Journal of power sources, 2022, 521: 230898.