摘要
在局部遮阴的情况下,光伏阵列的P-U特性曲线会出现多个局部最大功率点。传统的最大功率点追踪方法可以准确追踪到均匀光照下光伏阵列的最大功率点,然而在局部遮阴下则容易陷于局域最大功率点。针对这一缺陷,通过分析局部遮阴下光伏阵列的P-U以及I-U特性曲线,使用改进的扰动观察法追踪到所有的局域最大功率点,从而追踪到全局的最大功率点。MATLAB/Simulink仿真结果表明,该方法能够非常准确地追寻到全局最大功率点。
In the case of partial shading,a few local maximum power points appear in the P-U characteristic curve of the photovoltaic array.The traditional maximum power point tracking method can accurately track the maximum power point of the PV array under uniform illumination,but it is easy to fall into the local maximum power point under partial shading.In order to overcome this defect,the P-U and I-U characteristic curves of PV array under partial shading were analyzed.Also,the improved perturb&observe(P&O)was used to track the global maximum power point.And by means of MATLAB/Simulink simulation results,this method can track the global maximum power point accurately.
作者
王传捷
谷廷坤
吴昊
WANG Chuanjie;GU Tingkun;WU Hao(School of Electrical Engineering,Shandong University,Jinan 250061,China;State Gird Ji’nan Electric Power Company,Jinan 250001,China)
出处
《电器与能效管理技术》
2020年第2期47-53,77,共8页
Electrical & Energy Management Technology
关键词
光伏阵列
局部遮阴
特性曲线
改进扰动观察法
输出特性
PV array
partially shading
characteristic curve
improved perturb&observe
output characteristics
