阴影下光伏组件最大年发电量研究

Study on the Maximum Annual Energy Production of Photovoltaic Modules under Shadowing

以甘肃地区的光伏组件系统为基础,利用PVsyst模拟其无阴影遮挡情况及其存在阴影遮挡情况,结果表明:无阴影遮挡时,按照最佳间距、倾角安装组件可以获得最大年太阳辐射量,且此时即为最大年发电量。但是存在阴影遮挡时,会造成功率损失,且考虑到可组件的规整面积有限、全年运行时间内的阴影遮挡损失会随着倾角的减小而减小等因素,接收最大年太阳辐射量的倾角不一定能获得最大年发电量。因此,阴影下光伏组件需要进行优化设计-根据面积,综合考虑并多次调整倾角和间距值,可获得间距和倾角的一对最优适配值,确保最大年发电量。

Based on the PV module system in Gansu area,PVsyst is used to simulate the situation of no shadow shading and the situation of shadow shading,and the results show that:when there is no shadow shading,installing the modules according to the optimal spacing and inclination angle can obtain the maximum annual solar radiation,and this is the maximum annual power generation.However,when there is shadow shading,it will cause power loss,and considering the limited gauge area of the module,the loss of shadow shading during the whole year operation time will be reduced with the decrease of tilt angle,etc.,the tilt angle that receives the maximum annual solar radiation may not necessarily obtain the maximum annual power generation.Therefore,shaded PV modules need to be optimally designed-according to the area,a comprehensive consideration and multiple adjustments of the tilt and pitch values can be made to obtain a pair of optimal fit values of pitch and tilt to ensure the maximum annual power generation.