Temperature-power Stabilization Control Method for Hydrogen Fuel Cell Grid-connected Inverter with Temperature Adaptive Capability

The low-voltage and high-current operation characteristics of hydrogen fuel cell can easily lead to the damage of power devices due to overcurrent in traditional DC/DC converter, and the temperature change of fuel cell can easily lead to the destabilization of traditional control strategy, which seriously affects the safety of grid-connected hydrogen fuel cell. In this paper, for the safety and stability of hydrogen fuel cell grid-connected, firstly, a four-stage parallel Z-source DC boost hydrogen fuel cell grid-connected converter topology with high voltage gain and large current adaptability is proposed; on this basis, by constructing a mathematical model of the hydrogen fuel cell, we analyze the characteristics of the output voltage of the FPZDBHFC-GCC ports and the influence of temperature on the output power, and put forward a response to the temperature change. On this basis, the output power of FPZDBHFC-GCC is analyzed by constructing a mathematical model of the hydrogen fuel cell and analyzing the influence of temperature on the output power, and a stabilization strategy of the output power of FPZDBHFC-GCC is proposed in response to the temperature change, which significantly improves the stability of the grid-connection of the hydrogen fuel cell and contributes to the safe and reliable grid-connection of FPZDBHFC-GCC. Finally, the correctness and effectiveness of the proposed topology and control method are verified by simulation.