Rapid developments in hydrogen fuel cell (FC) energy and DC microgrid systems have extended the applications of multiphase parallel interleaved step-up converters for stabilizing DC bus voltages. DC microgrid applications include vehicle systems, shipboard power systems, and more electric aircraft, which generate power at low voltage levels. The cascade architecture of a power converter in a DC microgrid may cause large oscillations and imbalance given that converters considered as loads have constant power load characteristics. In this work, output DC bus voltage stabilization and current sharing of a multiphase parallel-interleaved-FC boost converter is presented. The proposed robust controller with added integrator action is based on the Hamiltonian–Lyapunov function. The efficacy and robustness of the designed controller were successfully authenticated by experimental results obtained using a 2.5 kW prototype FC converter (via four-phase parallel-interleaved boost converters) and the dSPACE MicroLabBox platform. The main source of the FC is based on a fuel reformer engine that converts fuel methanol and water into H ₂ gas in a polymer-electrolyte-membrane-FC stack (50 V, 2.5 kW).

中文翻译：

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基于李雅普诺夫函数的鲁棒哈密顿能量控制，用于直流微电网应用的四相并联燃料电池升压转换器

氢燃料电池 (FC) 能源和直流微电网系统的快速发展扩展了多相并联交错升压转换器用于稳定直流总线电压的应用。直流微电网应用包括车辆系统、舰载电源系统和更多电动飞机，它们在低电压水平下发电。考虑到被视为负载的转换器具有恒定功率负载特性，直流微电网中功率转换器的级联架构可能会导致大的振荡和不平衡。在这项工作中，提出了多相并联交错 FC 升压转换器的输出直流总线电压稳定和电流共享。所提出的具有附加积分器作用的鲁棒控制器基于哈密顿量-李雅普诺夫函数。使用 2.5 kW 原型 FC 转换器（通过四相并行交错升压转换器）和 dSPACE MicroLabBox 平台获得的实验结果成功验证了所设计控制器的有效性和稳健性。FC 的主要来源是基于燃料重整发动机，将燃料甲醇和水转化为 H ₂聚合物-电解质-膜-FC 堆中的气体（50 V，2.5 kW）。