基于Simulink的PEMFC动态响应特性研究

Study on dynamic response characteristics of PEMFC stack

利用MATLAB/SIMULINK软件平台建立电池的瞬态响应仿真模型。在考虑空气系统时间滞后的基础上分析减载时PEMFC发动机输出功率的瞬态响应特性。受空气系统的时间滞后影响,输出功率的瞬态响应特性不平滑出现波动。经研究发现,随空气压力不平衡性的增大,电池堆输出电压、功率的波动变大,为了控制输出精度在±0.1%,空气压力的不均匀度应控制在2%以内。

A dynamic response model of fuel cell stack output performance was established by MATLAB/SIMULINK. Considering the time lag of air system, the dynamic response of PEMFC engine output power was analyzed during deceleration. The dynamic response of output power unevenness fluctuated due to the influence of air system time lag. The research results show that with the increase of air pressure unevenness, the fluctuation of stack output voltage and power arise. To limit the relative error of stack output in ±0.1%, the air unevenness should be less than 2%.