无储能型直流耦合光伏制氢系统容量优化及控制策略

This paper proposes a capacity optimization method and control strategy for DC-coupled off-grid PV hydrogen production systems without energy storage. An optimization model is built based on PV and electrolyzer characteristics, targeting levelized hydrogen cost and curtailment rate. An MPPT-integrated safety-constrained PV control strategy is designed, and hardware-in-loop experiments verify its effectiveness, reducing LCOH by 6.96% and increasing annual H2 output by 23.2%.

光伏离网制氢通过电解水设备功率调节实现清洁能源就地转化,其独立电网特性兼具经济性与环保优势.为提高无储能型直流耦合光伏离网制氢系统的运行稳定性和经济性,提出系统容量优化方法及控制策略.首先,基于光伏和电解槽运行特性建立优化模型,以平准化制氢成本和弃光率为优化目标进行光伏容量优化配置.其次,针对制氢设备运行安全限制,提出了集成最大功率点追踪功能与功率安全约束的光伏控制策略,并通过多指标优化设计控制参数.最后,案例分析表明,与未优化的制氢系统相比,优化后的制氢系统平准化制氢成本降低了6.96%,年产氢量增加了23.2%.硬件在环实验验证了所提控制方法的有效性,保证了制氢系统的安全稳定高效运行.