标准摘要
[中文适用范围]: 本文件提供了一种方法,用于确定边框光伏模块在非均匀雪荷载影响下的机械性能。本文件适用于在预期安装后,其边框在下边缘突出于前玻璃表面,从而在雪从模块滑落时形成额外屏障的边框模块。对于其他边框构造(例如侧边缘、上边缘和下边缘形成的背轨,这些构造不形成额外的雪滑落屏障),本文件不适用。该测试方法确定了边框光伏模块的非均匀荷载机械极限。本文件中规定的荷载仅适用于自然雪荷载分布。任何预期的积载(例如来自除雪或重新分配的积载)应单独考虑。消除或非均匀积雪发生的方法(例如陡峭的安装角度,大于 60°)不包括在本文件中。本文件假设地面积雪与模块积雪之间存在关系,这可能不适用于雪在两次降雪之间未完全融化的地点。本文件不考虑积雪对发电的影响。虽然测试方法包括荷载步骤之间的等待时间,但该文件不提供对模块材料(如前玻璃)疲劳行为的完整评估。由于光伏模块因雪荷载造成的典型现场故障表现为玻璃破碎和框架弯曲,该测试方法旨在再现发生此类故障的荷载。 [外文原描述]: IEC 62938:2020 provides a method for determining how well a framed PV module performs mechanically under the influence of inclined non-uniform snow loads. This document is applicable for framed modules with frames protruding beyond the front glass surface on the lower edge after intended installation and as such creates an additional barrier to snow sliding down from modules. For modules with other frame constructions, such as backrails formed in frames, on the side edges, on the top edge and on the lower edge not creating an additional snow slide barrier, this document is not applicable. The test method determines the mechanical non-uniform-load limit of a framed PV module.
英文名称Photovoltaic (PV) modules - Non-uniform snow load testing