燃料电池-光伏混合发电系统建模与仿真

Model and simulation of PV-fuel cell hybrid power system

燃料电池-光伏混合发电系统的动态特性和控制技术直接影响它的动态性能。为了研究发电系统的动态特性,首先建立了燃料电池-光伏混合发电系统的动态数学模型,模型包括燃料电池、光伏电池、蓄电池和DC-DC变换器等部分,得到五阶非线性系统数学模型。采用滑模控制技术设计混合发电系统控制器。最后仿真分析了混合发电系统的动态特性和控制器的性能。在负载和光照、温度等干扰作用下,对3kW的发电系统进行仿真。仿真结果表明滑模控制器能够对发电系统进行有效控制,发电系统具有良好的动态特性,能够满足实际使用需要。

Dynamical characteristics and control strategies of the PV-fuel cell hybrid power system had effects on its performance, The dynamical modeling and simulation of a PV-fuel cell hybrid power system by slide mode control strategies were established, A five-order nonlinear model was developed to predict its dynamical characteristics including the models of a fuel cell, a PV array, a secondary cell, and a DC-DC converter, The controller by using sliding mode techniques was designed, The model was used to predict and study the transient responses of a 3 kW PV-fuel cell hybrid power system subjected to rapid load changes and disturbances of the solar isolation and the environmental temperature, The results show that perfect performances of the sliding mode controller and fast response capabilities of the PV-fuel cell hybrid power system are achieved.