基于负载变化的PEMFC非线性动态模型建立

Nonlinear dynamic model simulation of proton exchange membrane fuel cell based on load change

通过分析燃料电池的内部结构和工作原理,选取适当输入输出变量,建立质子交换膜燃料电池非线性状态空间模型。该模型的建立能反映燃料电池输出特性(输出电压、电流等)与操作条件(温度、湿度及压力等)之间的联系,把动态的非线性微分方程转化成等价的状态空间方程,为控制研究、数据处理和优化等方面提供便利,为性能诊断及输出特性优化提供了一定的理论依据。

A nonlinear state space model of proton exchange membrane fuel cell through the analysis of fuel cell internal structure and working principle was set up, the model is established by a selection of appropriate input/output variables. The relationship between fuel cell output characteristics （output voltage, current, etc.） and operating conditions （temperature, humidity, pressure and so on） were reflected through the establishment of the model, and the dynamic nonlinear differential equation was transformed into equivalent state space equations. Great convenience could be provided to control research, data processing and optimization, also certain theoretical basis was provided for performance diagnosis and output characteristic optimization.