局部遮挡下光伏阵列的快速建模及极值点分布特征研究  

Fast Modeling and Analysis of Power Peaks Characteristics of PV Arrays under Partial Shading Conditions

作　　者：周亮 武美娜 胡安[1,2] Zhou Liang;Wu Meina;Hu An(National Key Laboratory of Science and Technology on Vessel Integrated Power System Naval University of Engineering,Wuhan 430033 China;Wuhan New Energy Access Equipment and Technology Research Institute Co.Ltd,Wuhan 430205 China)

机构地区：[1]舰船综合电力技术国防科技重点实验室(海军工程大学),武汉430033 [2]武汉新能源接入装备与技术研究院有限公司,武汉430205

出　　处：《电工技术学报》2021年第S02期572-581,共10页Transactions of China Electrotechnical Society

摘　　要：该文通过引入Lambert W函数,将光伏电池的电压电流非线性超越方程进行解耦,分别推导出单个光伏电池、电池串、光伏组件、光伏组串的电压或电流显式表达式。在此基础上,提出一种基于组串特性曲线线性插值叠加的光伏阵列建模方法,建立考虑局部遮挡下的光伏阵列模型,避免了传统建模方法计算复杂且耗时长的难题。实验结果证明了光伏阵列建模方法的正确性和有效性。该文利用光伏阵列模型,进一步研究了局部遮挡下的光伏组串和光伏阵列的多个极值点分布特征,并推导出直接计算极值点电压、电流和功率的表达式,仿真及实验结果验证了计算公式的正确性。In this paper,Lambert W function was introduced to decouple the voltage and the current of the photovoltaic(PV)cells,then explicit functions of the voltage or current of a PV cell,cell string,PV module,and PV string were derived respectively.On this basis,a fast modeling approach was proposed based on PV strings curves superposition by linear interpolation for the PV array,and the PV array model was established under partial shading conditions,which avoids the problem of complex calculation and time-consuming of traditional modeling methods.The experimental results have confirmed that the modeling approach is correct and effective.Furthermore,the model was used for studying the power peaks characteristics of the PV string and the PV array under partial shading conditions.The expressions of power peaks are then derived to calculate the voltage,current,and power,which are also verified by simulation and experimental results.

关 键 词：Lambert W函数 光伏阵列模型 极值点 局部遮挡 

分 类 号：TM615[电气工程—电力系统及自动化]