光伏系统两种最大功率跟踪方法比较及并网仿真  

The Simulation Comparison of Two Maximum Power Point Tracking Methods of Grid-Connected Photovoltaic System

作　　者：秦文萍[1] 张炜[1] 孟繁华[1] 

机构地区：[1]太原理工大学电气与动力工程学院,太原030024

出　　处：《太原理工大学学报》2013年第2期237-241,共5页Journal of Taiyuan University of Technology

基　　金：山西省科技攻关项目(20120321005-02);国家国际科技交流与合作专项(2010DFB63200)

摘　　要：针对目前光伏系统元件仿真存在的稳定性问题,通过对光伏电池输入输出特性及等效电路进行分析,使用传递函数建立了两级式光伏并网发电系统的数学模型,其中包括电流输入型光伏电池、直流升压电路和逆变电路,并在Matlab/Simulink环境下建立了仿真模型。利用该模型可以模拟任意光照强度和温度下光伏电池的输入输出特性。对电流扰动法和电导增量法两种最大功率跟踪(MPPT)方法进行了仿真对比,总结了两种方法的优缺点及适用场合。使用该模型实现了光伏电池逆变并网仿真。There are stability problems in photovoltaic system components simulation usually. After analyzing the photovoltaic cells input-output characteristics and the equivalent circuit, this paper established a simulation model for bipolar grid-connected photovoltaic system with booster circuit and inverter circuit on the basis of the transfer function in MATLAB/Simulink. The pho- tovoltaic cells output characteristics in different illumination intensity were simulated using this model. Two different Maximum Power Point Tracking （MPPT） methods, the perturbation ob- servation and conductance increment methods, were compared through simulations. The advanta- ges/disadvantages of the two methods and their respective applicable occasions were analyzed and summarized. Finally, the photovoltaic cells connected to the grid were simulated using this model.

关 键 词：光伏并网 MATLAB仿真 传递函数 最大功率跟踪 

分 类 号：TM4[电气工程—电器] TM6