摘要
光伏发电系统中,光伏阵列在受到阴影遮挡时,其输出功率和电压特性不再是单一电池板的单峰值特性,采用以往的MPPT算法会使系统陷入局部的最大功率点。为了实现多峰值最大功率点的跟踪,文章首先建立了光伏阵列的数学模型,仿真分析了其多峰值特性。研究了一种基于POC的全局最大功率点跟踪算法,该算法从开路电压、短路电流向中间搜索,在光伏阵列输出特性的全范围内进行最大功率点的搜索,可优先避免陷入局部最大功率点的问题。
In photovoltaic power generation systems,when the PV array is shaded,its output power and voltage characteristics are no longer single-peak characteristics of a single panel.The previous MPPT algorithm will cause the system to fall into the local maximum power point.In order to achieve multi-peak maximum power point tracking,the paper first established a mathematical model of the photovoltaic array,and simulated its multi-peak characteristics.A global maximum power point tracking algorithm based on POC is studied.The algorithm searches from the open circuit voltage and short circuit current to the middle,and searches for the maximum power point within the full range of the PV array output characteristics.It can preferentially avoid the problem of falling into the local maximum power point.
作者
国芳
夏帅
周静超
薛林
Guo Fang;Xia Shuai;Zhou Jingchao;Xue Lin(Jiangsu Vocational Institute of Architectural Technology,Xuzhou 221116,China;Xuhai College of China University of Mining and Technology,Xuzhou 221008,China)
出处
《无线互联科技》
2019年第2期128-129,132,共3页
Wireless Internet Technology
关键词
局部阴影
多峰值
全局最大功率跟踪
local shadow
multi-peak
global maximum power tracking
