基于一种数学算法的光伏电池MPPT控制方法  

Photovoltaic Cells MPPT Control Method Based on a Mathematic Algorithm

作　　者：夏向阳[1] 程莎莎[1] 黄湘源[1] 

机构地区：[1]长沙理工大学电气与信息工程学院,湖南长沙410077

出　　处：《电力科学与工程》2013年第6期1-5,共5页Electric Power Science and Engineering

基　　金：科技计划项目重大科技专项(2010A080804023);湖南省自然科学基金资助项目(2011JJ5027);湖南省科技计划项目(2011JJ3118)

摘　　要：当外部环境和负载发生变化,光伏电池输出功率也随之变化,为了提高系统的光电转换效率及跟踪响应速度,提出了一种改进的基于数学方法的最大功率点跟踪方式———基于拉格朗日中值定理的变步长电导增量法。该方案通过判断曲线一点的导数与限定因子的大小,选择不同方式来改变占空比,从而达到提高系统的快速性与稳定性的目的。并在Matlab仿真环境下利用SimPowerSystem模块建立仿真模型。仿真结果表明,在系统发生突变的情况下,该算法能准确快速跟踪在MPPT处,证实了算法的实用性及可靠性。When the external environment and the loads change, the output power of photovohaic battery changes too. In order to improve the photoelectric conversion efficiency and the response speed of tracking, this paper pres- ents an improved mathematical method based on maximum power point mode, variable step size of INC （ conduct- ance increment method） based on Lagrange Theorem Mean. The program through the judgment curves a little deriv- ative and limiting factor size, chooses different ways to change the duty ratio, to improve speed and stability of the system. Under the environment of the Maflab/SimpowerSystem to build simulation model. The results show that, in the event of a system mutations, the algorithm can accurately track in the MPPT department, and this algorithm is practical and reliable.

关 键 词：占空比 拉格朗日中值定理 电导增量法 变步长 

分 类 号：TM615[电气工程—电力系统及自动化]