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考虑云层影响的大型光伏发电系统辐照强度计算模型

DOI: 10.13334/j.0258-8013.pcsee.2015.17.002, PP. 4291-4299

Keywords: 光伏发电,辐照强度,云层阴影,相关矩阵,云隙效应,云层透光率

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Abstract:

该文模拟云层遮阴导致大型光伏发电系统辐照强度空间分布不均的情形,在考虑太阳辐射随时间变化的同时重点分析了因云层移动导致的太阳辐射空间分布的随机性和不确定性。首先计算任意地点任意时刻的天文辐射强度,依次考虑大气层衰减、电站所在区域的云层的动态影响,计算到达水平地面的辐照强度,最终得到光伏组件倾斜面上的辐照强度。该模型考虑了地形地貌对日出日落时间的影响、云层分布特性及其和天气的相关性、不同类型的云层透光率、“云隙效应”、云层重叠及云层边缘效应,并能以较高时间分辨率进行仿真计算。由于综合考虑了辐照强度的确定性和随机性部分,该模型对研究光伏发电系统暂稳态分析、实时控制及并网光伏发电对电网的影响具有参考意义。

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