电-氢混合储能孤岛直流微电网能量管理

4 结论

本文以含有光伏阵列、燃料电池、蓄电池、电解槽及储氢罐的孤岛直流微电网作为研究对象,提出一种基于使用成本最小及稳定储能状态的直流微电网能量管理方法。该方法通过储能系统最小算法降低储能系统成本,同时加入等效氢耗最小算法维持储能系统的储能状态,对各微源功率进行合理分配,实现系统使用成本及储能水平的优化控制。通过RT-LAB在线实时运行对本文提出的能量管理方法在成本及其他指标上进行了验证,结果表明：系统使用成本相较于传统能量管理方法大幅减少,且储能系统状态更加稳定,储量始终保证在期望水平,氢储能系统利用率高,增加了系统可靠性。对直流微电网系统经济、稳定运行具有重要意义。本文所提方法为以小时为时间尺度的在线实时优化,该方法能够对系统进行灵活、可靠的优化控制;但考虑到目前所有在线实验的工作时长及实际要求,无法对更长时间尺度(月、年)的情况进行实验验证。在今后的工作中,将从离线及在线两方面入手,对更大规模系统的宏观经济性及各季度环境的变化性进行更加深入的研究。

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