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首页> 外文期刊>Progress in photovoltaics >Estimating and parameterizing mismatch power loss in bifacial photovoltaic systems
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Estimating and parameterizing mismatch power loss in bifacial photovoltaic systems

机译：估计和参数化双层光伏系统中的不匹配功率损耗

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摘要

Nonuniform irradiance on the rear side of bifacial photovoltaic (PV) systems can cause additional mismatch loss, which may not be appropriately captured in PV energy production estimates and software. We evaluated several scenarios including horizontal single-axis tracking (HSAT) over natural ground-cover and rooftop-mounted systems over high albedo reflective roofs. We found mismatch losses of up to 1.5% annual loss for very close-mounted (0.15 m) rooftop systems, but losses for HSAT systems and high-ground-clearance rooftop systems were lower (<0.5%). A simplified empirical relationship was found that links the spatial variation of irradiance (specifically, the mean absolute difference of irradiance) to the resulting mismatch loss factor, with anR(2)better than .99. This approximate relationship was experimentally validated on mismatched PV modules, and it provides a basis for rapidly estimating bifacial mismatch loss factors for use in hourly PV performance simulations such as PVSyst or SAM. Additional parameters investigated include (a) climate dependence and module orientation, which were not found to have a strong impact on bifacial mismatch losses and (b) PV module fill factor and bifaciality ratio, which did have a strong linear impact on mismatch losses.
机译：双因素光伏（PV）系统后侧的非均匀辐照度可导致额外的失配损失，这可能不会在光伏能源生产估算和软件中适当捕获。我们评估了几种方案，包括在高反光反光屋顶上的天然地面盖和屋顶安装系统的水平单轴跟踪（HSAT）。我们发现非常近距离安装（0.15米）屋顶系统的不匹配损失高达1.5％，但HSAT系统和高层间隙屋顶系统的损失较低（<0.5％）。发现简化的经验关系，将辐照度的空间变化（特别是，辐照度的平均绝对差异）联系起来的不匹配损耗因子，ANR（2）优于.99。在非匹配的光伏模块上实验验证了这种近似关系，为快速估算了在每小时的PV性能模拟中的双因子错配损失因子，如PVSyst或Sam的基础。研究的附加参数包括（a）气候依赖性和模块取向，没有发现对双因子错配损失和（b）光伏模块填充因子和双相度比具有强烈影响，这对错配损失具有强烈的线性影响。

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