A new solar to hydrogen conversion system with high efficiency and flexibility
A new solar to hydrogen conversion system with high efficiency and flexibility
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一种高效、灵活的新型太阳能至氢气转换系统
DOI：
10.1109/icrera.2017.8191100
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发表时间：
2017
期刊：
影响因子：
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通讯作者：
M. Sugiyama
中科院分区：
文献类型：
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作者：
Dayi Yamashita;H. Nakao;Y. Yonezawa;Y. Nakashima;Y. Ota;K. Nishioka;M. Sugiyama
太阳能制氢转换是一项很有前景的技术，因为它能够实现太阳能的大容量、长期储存。我们提出了一种新型高效太阳能制氢转换系统，该系统由多个并联到光伏（PV）阵列的转换器 - 电解器组构成。这个系统可灵活应用于各种光伏配置。基于实测的光伏和电解器特性进行的一日模拟表明，在晴朗的天气下，最大功率点跟踪（MPPT）效率极高（高于99.9%），平均功率转换效率为94.0%。与使用最佳商用转换器之一的单一转换器系统相比，预计年发电量将提高8.5个百分点。高效率的关键要素是新的系统拓扑结构、一种专门设计的移相全桥转换器以及一种“带转换器评分的P&O”控制方法算法。
Solar-to-hydrogen energy conversion is a promising technology because it enables high-capacity, long-term storage of solar energy. We propose a new highly efficient solar-to-hydrogen conversion system consisting of multiple converter-electrolyzer sets connected in parallel to a photovoltaic (PV) array. This system is flexible to apply to various PV configurations. One-day simulations based on measured PV and electrolyzer characteristics demonstrate very high maximum power point tracking (MPPT) efficiency (higher than 99.9%) and average power conversion efficiency (94.0%) on a clear sunny day. Annual energy production is expected to increase by 8.5%-point compared with a single converter system using one of the best commercial converter. The key elements of the high efficiency are the new system topology, a specially designed phase-shift full-bridge converter and a control method “P&O with converter scoring” algorithm.