太阳电池性能参数的提取方法和影响因素的研究

发布时间：2018-06-27 17:08

本文选题：太阳电池参数 + 提取方法　；参考：《南昌航空大学》2014年硕士论文

【摘要】：光伏发电的核心部件是太阳电池，衡量电池性能的重要依据是其光生电流，反向饱和电流，理想因子，串联电阻，并联电阻5个电性参数；但是这些参数隐含在一个描述太阳电池电流电压特性的方程中。由于该方程是一个复杂的超越非线性函数方程,无法直接求解各参数；所以如何基于太阳电池电流输出方程,然后根据电流电压特性实验曲线，简单而又精确地确定以上5个参数成为太阳电池应用研究的一个重要方向。本文在前人研究的基础上做了以下工作：(1)分析比较了解析方法和显函数方法。研究了两种方法在提取太阳电池参数过程中优劣，并分析了两种误差来源。(2)基于太阳电池电流电压特性提出四种提取太阳电池特性参数方法。第一种方法是基于太阳电池光生电流远大于反向饱和电流,并联电阻远大于串联电阻以及光生电流近似等于负的短路电流3个边界条件,结合太阳电池在短路点、开路点和最大功率点处的极值表述,提出的一种解析求解太阳电池5个电性参数的方法。第二种方法是在第一种方法的基础上对最大功率点处求二阶导数的解析求解上述五个参数的方法。第三种方法是将二阶导方法与Lambert-W函数结合提取太阳电池参数的方法。第四种方法是基于太阳电池电流输出方程及对太阳电池I-V曲线分段拟合的基础上，，利用Lambert-W函数，将电流输出方程显化，对分段拟合方程进行积分，建立求解太阳电池5个电性参数的非齐次方程组，得到各个参数的解析解。(3)分析比较了前三种方法提取太阳电池参数的优劣，并比较了三种方法所提取硅电池参数在不同光照强度和光入射角下的变化，并分析变化原因。(4)运用第四种方法提取了不同光照条件下的镓砷太阳电池的参数，分析了参数随着光入射角的变化原因。本文提出的四种方法应用无论应用于实验数据还是文献数据，拟合结果都很好，本文在提取参数的过程中力求找到提取过程更加简单，提取结果更加精确的方法。本研究为太阳能电池生产及测试提供了一定理论基础，为当前太阳能电池参数提取方法提供了一定理论指导。
[Abstract]:The core component of photovoltaic power generation is solar cell. The important basis for measuring the performance of the cell is its photogenerated current, reverse saturation current, ideal factor, series resistance and parallel resistance. But these parameters are implicit in an equation that describes the current and voltage characteristics of solar cells. As the equation is a complex transcendental nonlinear function equation, it can not directly solve the parameters, so how to base on the solar cell current output equation, and then according to the current and voltage characteristics of the experimental curve, Simple and accurate determination of the above five parameters has become an important research direction of solar cell application. In this paper, the following works are done on the basis of previous studies: (1) the analytical method and explicit function method are analyzed and compared. The advantages and disadvantages of the two methods in the extraction of solar cell parameters are studied, and two sources of errors are analyzed. (2) based on the current and voltage characteristics of solar cells, four methods are proposed to extract the parameters of solar cells. The first method is based on three boundary conditions: the photogenerated current of the solar cell is far greater than the reverse saturation current, the parallel resistance is far greater than the series resistance, and the photogenerated current is approximately equal to negative short-circuit current, and the solar cell is at the short-circuit point. This paper presents an analytical method for solving the five electrical parameters of solar cells by expressing the extreme values at open circuit points and maximum power points. The second method is based on the first method to solve the above five parameters analytically for the second order derivative at the maximum power point. The third method is to combine the second-order derivative method with Lambert-W function to extract the solar cell parameters. The fourth method is based on the current output equation of solar cell and the piecewise fitting of I-V curve of solar cell. Using Lambert-W function, the current output equation is explicit, and the piecewise fitting equation is integrated. The inhomogeneous equations for solving five electrical parameters of solar cells are established, and the analytical solutions of each parameter are obtained. (3) the advantages and disadvantages of the first three methods for extracting solar cell parameters are analyzed and compared. The parameters of silicon cells extracted by three methods under different illumination intensity and incident angle were compared and the reasons were analyzed. (4) the parameters of gallium arsenic solar cells under different illumination conditions were extracted by the fourth method. The reason of the change of parameters with the incident angle of light is analyzed. The four methods proposed in this paper are applied to the experimental data and the literature data, and the fitting results are very good. In the process of extracting the parameters, we try to find the method that is simpler and more accurate in the process of extracting the parameters. This study provides a theoretical basis for solar cell production and testing, and provides a theoretical guide for the current solar cell parameter extraction method.
【学位授予单位】：南昌航空大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TM914.4

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