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首页> 外文会议>European Photovoltaic Solar Energy Conference and Exhibition >REALISTIC YIELD EXPECTATIONS FOR BIFACIAL PV SYSTEMS - AN ASSESSMENT OF ANNOUNCED, PREDICTED AND OBSERVED BENEFITS
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REALISTIC YIELD EXPECTATIONS FOR BIFACIAL PV SYSTEMS - AN ASSESSMENT OF ANNOUNCED, PREDICTED AND OBSERVED BENEFITS

机译：双向光伏发电系统的实际收益期望-评估，预估和观察到的收益

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摘要

Bifacial PV modules are able to convert solar irradiation from both surfaces. Therefore, larger amounts of produced energy are expected - compared to standard (monofacial) modules. Today, bifacial modules are offered by an increasing number of manufacturers, and marketing material sometimes promises quite optimistic bifacial gains. Reports on bifacial PV systems are also found in the literature, but mainly for test setups or small PV systems only. For large PV installations (as known with standard PV modules), realistic bifacial gains still need an assessment. Currently, none of the widely utilized PV system simulation tools is able to predict the rear surface contribution of bifacial modules accurately. Therefore, our approach combines simulation tools from different fields of (solar) energy technology, the lighting and daylighting domain and the PV system simulation domain. In this way, we are able to deal with solar geometry, sky radiance distribution, scene geometry, surface properties, PV module properties and wiring scheme without any need for severe approximations in the model definition. Using this tool, we calculated realistic yield values for a number of system configurations. The results are discussed with respect to their bifacial gain in relation to space requirements (expressed by ground cover ratio), mounting options and ground albedo. Reasonable ranges for expectable gains from bifacial modules and PV systems are given in the conclusion of this contribution.
机译：双面光伏组件能够转换两个表面的太阳辐射。因此，与标准（单面）模块相比，预计会产生更多的能量。如今，越来越多的制造商提供了双面模块，有时营销材料有望带来相当乐观的双面收益。关于双面光伏系统的报告也可以在文献中找到，但主要用于测试装置或小型光伏系统。对于大型光伏装置（与标准光伏模块相同），实际的双面收益仍需要评估。当前，没有一个被广泛使用的光伏系统仿真工具能够准确地预测双面模块的后表面贡献。因此，我们的方法结合了来自（太阳能）能源技术，照明和采光领域以及光伏系统仿真领域不同领域的仿真工具。这样，我们就可以处理太阳几何形状，天空辐射分布，场景几何形状，表面特性，PV组件特性和布线方案，而无需在模型定义中进行严格的近似。使用此工具，我们计算了许多系统配置的实际产量值。讨论了与空间需求（以地面覆盖率表示），安装选项和地面反照率有关的双面增益的结果。在此贡献的结论中给出了双面模块和光伏系统可预期收益的合理范围。

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