安装参数不一致下单轴光伏系统跟踪算法研究

Research on Tracking Algorithms for Single Axis Photovoltaic System with Different Installation Parameters

在支架安装参数不一致时,东西向排列的单轴光伏跟踪支架地面阴影分布不均,传统的单轴跟踪算法尤其是反阴影跟踪不适用。本文建立单轴光伏跟踪支架通用数学模型,通过对光线入射夹角、阴影分布及遮挡情况进行评估,在保证组件无阴影遮挡的前提下,为每台支架设计合理的跟踪算法,最大化提高整个阵列系统接收的总光照强度值。最后,以江苏某电站四台跟踪支架为例进行仿真分析,得到每台支架日跟踪角度曲线。

When the mounting parameters of the bracket are different,the shadows on the ground of the single-axis photovoltaic tracking bracket arranged in the east-west direction are uneven. The traditional single-axis tracking algorithm,especially the anti-shadow tracking,is not applicable. In this paper,a general mathematical model of single-axis photovoltaic tracking bracket was established. By evaluating the incidence angle,shadow distribution and occlusion of light,a reasonable tracking algorithm was designed for each bracket to maximize the total light intensity received by the whole array system without shading. Finally,taking four tracking brackets of a power station in Jiangsu as an example,the daily tracking angle curve of each bracket was obtained.