太阳能电池双二极管模型显式表达方法研究

发布时间：2018-05-01 22:55

本文选题：太阳能电池 + I?V特性　；参考：《渤海大学》2015年硕士论文

【摘要】：太阳能光伏发电具有分布广泛、无污染、不受地域限制等独特的优点,近年来正飞速发展。为了使太阳能光伏发电系统实现最优化设计和运行,需要利用一个精确的太阳能光伏发电系统仿真模型进行实验测试获得相关参数。太阳能光伏组件是太阳能发电系统的核心部分,也是太阳能发电系统中价值最高的部分,它是由多个单体的太阳能电池片根据需要串、并联组成的。因此,需要建立准确的太阳能光伏电池仿真模型。太阳能电池模型通常有两种:单二极管模型和双二极管模型。这两种模型的电流-电压(I?V)特性在数学描述上是隐式超越方程。根据I?V特性方程,通过数值方法可以得到对应不同电压(电流)的电流(电压)值,然而,即使有相对好的初始猜值,这些数值方法往往也难以收敛。因此,在实际的太阳能光伏发电系统设计与运行中,设计工程师需要一个简单、快速、有效的太阳能电池的显式模型。本文主要研究太阳能电池模型的显式建模方法。首先,提出一种新的解析方法建模太阳能电池的串联电阻,结合其他研究者提出的四个电池参数(并联电阻,反向饱和电流,光生电流,理想因子)模型,能够有效地估计太阳能电池单二极管模型的I?V特性。其次,利用泰勒展开式表达太阳能电池双二极管模型的指数函数,得到双二极管模型的显式表达式,进而提出两个基于泰勒展开式的新的七参数提取模型。最后,利用Padé逼近表达太阳能电池双二极管模型的指数函数,得到双二极管模型的显式表达式,进而提出两个基于Padé逼近的新的七参数提取模型。针对上述提出的显式建模方法,本文选择不同技术的硅太阳能组件进行仿真验证。仿真结果表明,本文提出的模型是准确、有效、可行的。
[Abstract]:Solar photovoltaic power generation has been developing rapidly in recent years because of its unique advantages such as wide distribution, no pollution and no geographical restrictions. In order to optimize the design and operation of solar photovoltaic system, it is necessary to use an accurate simulation model of solar photovoltaic system to obtain the relevant parameters. Solar photovoltaic module is the core part of solar power system and also the most valuable part of solar power system. Therefore, it is necessary to establish an accurate simulation model of solar photovoltaic cells. There are usually two solar cell models: single diode model and double diode model. The characteristics of the two models are implicit transcendental equations in mathematical description. The current (voltage) corresponding to different voltage (current) can be obtained by numerical method according to the Igna V characteristic equation. However, even if there is a relatively good initial guess, these numerical methods are often difficult to converge. Therefore, in the actual design and operation of solar photovoltaic system, the design engineer needs a simple, fast and effective explicit model of solar cell. This paper mainly studies the explicit modeling method of solar cell model. First of all, a new analytical method is proposed to model the series resistance of solar cells, combining with the four cell parameters (parallel resistance, reverse saturation current, photogenerated current, ideal factor) proposed by other researchers. It can effectively estimate the IV characteristics of the single diode model of solar cells. Secondly, the exponential function of double diode model of solar cell is expressed by Taylor expansion, and the explicit expression of double diode model is obtained, and two new seven parameter extraction models based on Taylor expansion are proposed. Finally, Pad 茅 approximation is used to express the exponential function of the double diode model of solar cells, and the explicit expression of the double diode model is obtained, and two new seven-parameter extraction models based on Pad 茅 approximation are proposed. In view of the explicit modeling method proposed above, the silicon solar modules with different technologies are selected for simulation verification in this paper. The simulation results show that the proposed model is accurate, effective and feasible.
【学位授予单位】：渤海大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TM914.4

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