基于趋势转折点的光伏阵列分段线性仿真模型  

PIECEWISE LINEAR SIUMLATION MODEL OF PHOTOVOLTAIC ARRAY BASED ON TENDENCY TURNING POINT

作　　者：李梅[1,2] 梁喆 姜媛媛[1] Li Mei;Liang Zhe;Jiang Yuanyuan(School of Electrical and Information Engineering,Anhui University of Science and Technology,Huainan 232001,China;School of Information and Electrical Engineering,China University of Mining&Technology,Xuzhou 221008,China)

机构地区：[1]安徽理工大学电气与信息工程学院,淮南232001 [2]中国矿业大学信息与电气工程学院,徐州221008

出　　处：《太阳能学报》2020年第2期319-324,共6页Acta Energiae Solaris Sinica

基　　金：国家自然科学基金(51604011);安徽省教育厅自然科学基金(KJ2016A193)。

摘　　要：为实现光伏阵列的非线性I-U特性曲线在工程应用上的模型简化,提出一种基于趋势转折点的分段线性等效模型。该模型将光伏阵列输出曲线按趋势转折点分区后进行分段线性化,并给出在分段数不同时最优趋势转折点选取的依据。利用PSCAD软件搭建分段线性等效电路的仿真模型,并将各段误差值与其他分段线性模型的误差值进行比较。仿真结果和实验结果同时表明该模型在保证精度的同时可减少分段数,从而降低仿真模型搭建的复杂性,并有效减小最大误差点的误差值。In order to simplify the model of nonlinear PV array I-U characteristics curve in engineering applications,a piecewise linear equivalent model based on the tendency turning point is proposed. In this model,the I-U curve of PV array is piecewise linearization according to the tendency turning point,and the basis of selecting the best tendency turning point is given. A simulation model of piecewise linear equivalent circuit is constructed,and the error values of each segment are compared with those of other piecewise linear models. The simulation and experimental results show that the model can reduce the number of segments while guaranteeing the accuracy,thus reducing the complexity of the simulation model and effectively reducing the error value of the maximum error point.

关 键 词：光伏 I-U特性曲线 分段线性 仿真 

分 类 号：TM91[电气工程—电力电子与电力传动]