Fuel cell air supply system control based on oxygen excess ratio

Fuel cell air supply system has a delay due to compressor during load-changing process, and cannot supply air to the stack quickly, which may lead to oxygen starvation. Oxygen starvation not only affects the output power of the fuel cell, but also leads to a decrease in catalyst performance and fuel cell durability. This paper proposes an adaptive PID controller strategy based on fuzzy logic control for fuel cell air supply system. The control objective is to adjust the oxygen excess ratio to a suitable value to prevent oxygen starvation. The simulation results show that the proposed controller can quickly and stably adjust the oxygen excess ratio to the suitable value.

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