Fuel Cell Equivalent Transient Circuit Model Considering Inertial System Dynamic Latency

Abstract

The rapid development of hydrogen energy places fuel cell (FC) modeling at emerging field of research. However, existing FC models focus on the long-term steady-state performance with a focus on the degradation, fluid and thermal management, neglecting the transient performance in the electrical system. In this paper, an equivalent transient circuit model (ETCM) is proposed to analyze the dynamic power response of the FC system in power converter-dominated electrical systems. To further imitate the power latency caused by compressor and mass flow control operations, the cathode concentration loss is emphasized and modeled as a dynamic resistor. The ETCM is validated in series with a DC-DC power converter for different cases, providing a significant reference for FC applications in electrical power systems.