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引用次数: 9
摘要
燃料电池是一种有吸引力的替代能源，并在各种应用中使用。提出了固体氧化物燃料电池(SOFC)电力系统的状态空间模型，该系统由燃料电池、DC-DC降压变换器和负载组成。在本研究中，我们对SOFC馈送直流负载进行了案例研究，其中DC-DC降压转换器充当负载和源之间的接口。比例积分(PI)控制器与脉宽调制(PWM)结合使用，计算脉宽并在适当的时刻切换MOSFET，从而获得所需的电压。利用MATLAB/SIMULINK对该模型进行了仿真验证。燃料电池动力系统(FCPS)的控制器使用XC3S500E开发板进行原型设计，该开发板包含SPARTAN 3E Xilinx FPGA，简化了整个控制电路，并为进一步改进提供了额外的灵活性。结果清楚地表明性能有所提高，并验证了我们提出的模型。
An FPGA Based Controller for a SOFC DC-DC Power System
Fuel cells are an attractive option for alternative power and of use in a variety of applications. This paper proposes a state space model for the solid oxide fuel cell (SOFC) based power system that comprises fuel cell, DC-DC buck converter, and load. In this investigation we have taken up a case study for SOFC feeding a DC load where a DC-DC buck converter acts as the interface between the load and the source. A proportional-integral (PI) controller is used in conjunction with pulse width modulation (PWM) that computes the pulse width and switches the MOSFET at the right instant so that the desired voltage is obtained. The proposed model is validated through extensive simulation using MATLAB/SIMULINK. Controller for the fuel cell power system (FCPS) is prototyped using XC3S500E development board containing a SPARTAN 3E Xilinx FPGA that simplifies the entire control circuit besides providing additional flexibility for further improvement. The results clearly indicate improved performance and validate our proposed model.
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