| 摘要: |
| 对燃料电池并联供电系统的数学模型建立过程和控制策略进行了研究。根据电路的工作原理，以电路中电感的电流和电容两端的电压为变量，推导出系统稳态状态空间的矩阵方程，进而建立主电路的小信号数学模型。在建立单个燃料电池供电的电压控制模型和稳定性分析之后，以平均电流法构建出整个系统的控制模型。通过分析闭环传递函数的幅频特性，对系统的稳定性进行了判定。在理论分析的基础上，对2台燃料电池并联供电系统及其控制方案进行了闭环仿真，给出了仿真输出波形。结果证明，所采用的分析方法和建立的数学模型以及采取的控制策略是正确的。 |
| 关键词: 燃料电池 并联供电 DC／DC变换器 平均电流控制模式 仿真 稳定性分析 |
| DOI： |
| 分类号: |
| 基金项目:国家自然科学基金资助项目（61074069）；贵州财经学院博士科研启动基金资助项目 |
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| Modeling and control of power supply system with parallel fuel cells |
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FANG Ruju, ZHANG Yuanmin
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College of Electrical & Information Engineering，Xuchang University，Xuchang 461000，China
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| Abstract: |
| The mathematical model of power supply system with parallel fuel cells is built and its control strategy is studied. According to the working principle of circuit，its inductor current and the capacitor voltage are taken as the variables to deduce the steady state space matrix equation of system and its small-signal model is further established. After the voltage control model for power supply system with single fuel cell is established and its stability is analyzed，the control model for entire system is constructed with the average current method. The system stability is determined by analyzing the amplitude-frequency characteristics of closed-loop transfer function. Based on the theoretical analysis，the simulative output waveforms of power supply system with two parallel fuel cells are given，which verifies the correctness of the introduced analysis method，the mathematical model and the control strategy. |
| Key words: fuel cell parallel operation DC／DC converter average current control mode simulation stability analysis |
