光照不均匀情况下光伏阵列最大功率跟踪控制  

Maximum Power Point Tracking Control for PV Array Under Non-Uniform Illumination

作　　者：郑飞[1] 夏烈[1] 董颖华[1] 

机构地区：[1]中国电力科学研究院,江苏南京210003

出　　处：《电网与清洁能源》2013年第9期52-56,共5页Power System and Clean Energy

基　　金：国家电网公司科技项目(NY71-12-015);中国电力科学研究院科技项目(NY84-13-003)~~

摘　　要：当光伏阵列受到不均匀光照时,输出的功率电压曲线含有多个局域峰值。针对此光照不均匀情况,建立光伏阵列多峰数学模型,并提出一种最大功率跟踪控制方法。采用连续函数构建光照不均匀情况下光伏阵列输出功率电压曲线;依次从该曲线的两侧或中部迭代搜索各局部最大功率点,确保在各种光照情况下均获得全局最大功率;通过Matlab仿真实例验证了所提多峰数学模型和最大功率跟踪控制方法的正确性。When the PV array is under non-uniform illu- mination, the output voltage-power curve contains multi-local maximum points. For this case, a multi-summit mathematical model is established and a maximum power point tracking control method is proposed. First, the PV array＇s output voltage- power curve under non-uniform illumination is established by continuous function. Furthermore, the multi-local maximum power points are searched step by step from the two sides or middle of the curve so that the global maximum power point is acquired under all kinds of non-uniform illumination conditions. Finally, a MATLAB simulation example is given to verify the correctness of the proposed multi-summit mathematical model and maximum power point tracking control method.

关 键 词：光伏阵列 不均匀光照 多峰数学模型 最大功率跟踪 全局最大功率 

分 类 号：TM914.4[电气工程—电力电子与电力传动]