混合能源直流微电网能源优化管控策略研究

混合能源直流微电网在快速跟踪负载方面具有较大优势，弥补了固体氧化物燃料电池(solidoxidefuelcell,SOFC)直流微电网功率跟踪缓慢的问题。现有能源管控策略重点关注能源分配，对系统效率、运行安全性和燃料亏空方面缺乏相关研究和成熟策略。为此，提出了一种混合能源直流微型电网能源优化管控策略。首先，搭建了混合SOFC直流微电网模型。其次，采用最优操作点(optimal operating points, OOPs)实现最大效率，然后采用平均电流控制模式保证稳定的电力供应。最后，设计了基于SOFC电流的时滞控制算法来避免燃料亏空。实验结果表明，所提出的能源优化管控策略具有时间响应迅速、输出效率高和热特性良好等优势。

Energy optimization and control strategy for a hybrid energy DC microgrid

A hybrid energy DC microgrid has the great advantage of fast load tracking, which makes up for the slow power tracking problem of the solid oxide fuel cell (SOFC) DC microgrid. The existing energy management and control strategies focus on energy allocation but lack the relevant research and mature strategies in terms of system efficiency, operational safety, and fuel starvation. Therefore, an energy optimization and control strategy for hybrid energy DC microgrid is proposed. First, a hybrid SOFC DC microgrid model is constructed. Then, optimal operating points (OOPs) are used to achieve maximum efficiency. An average current control mode is adopted to ensure a stable power supply. Finally, a time-delay control algorithm based on the SOFC current is designed to avoid fuel starvation. The experimental results indicate that the proposed energy optimization and control strategy has advantages such as fast response, high output efficiency, and good thermal characteristics.