基于分数阶极值搜索的光伏最大功率跟踪控制  

A Novel Maximum Power Point Tracking Scheme for Photovoltaic Systems Under Fractional Order Extremum Seeking Control

作　　者：蔡兴龙[1] 马铭磷[1] CAI Xinglong;MA Minglin(College of Information Engineering, Xiangtan University, Xiangtan 411105, China)

机构地区：[1]湘潭大学信息工程学院,湘潭411105

出　　处：《电源学报》2017年第6期43-48,共6页Journal of Power Supply

基　　金：湖南省自然科学基金资助项目(2015JJ2140;2015JJ2142)~~

摘　　要：针对光伏阵列获取最大功率点过程动态响应速度和稳态跟踪精度二者之间不能达到平衡的问题,提出一种基于分数阶极值搜索控制(FO-ESC)的光伏阵列最大化功率点跟踪方法。该方法主要利用分数阶理论提高极值搜索过程的收敛速度和鲁棒性;与整数阶极值搜索控制(IO-ESC)相比,其降低了算法的复杂性。为了验证所提方法的有效性,在Matalb/Simulink中搭建仿真模型进行仿真分析。结果表明,所提方法与IO-ESC相比具有更快的收敛速度和鲁棒性,能够应用于光伏发电工程。Aiming at the balance between the dynamic response speed and the steady-state tracking accuracy of the maximum power point of the photovoltaic(PV)array,a PV-maximized power point tracking(MPPT)method based on fr-actional order extreme seeking control(FO-ESC)is proposed.This method mainly uses the fractional theory to improve the convergence speed and robus-tness in the process of extremum search,and reduce the complexity of the algorithm compared to integer order extremum seeking control(IO-ESC).In order to verify the effectiveness of the proposed method,a simulation model is established in Matlab/Simulink for simulation analysis.The results not only show that the proposed method has better convergence speed and robustness than IO-ESC,but also can be applied to photovoltaic power generation project.

关 键 词：光伏阵列 最大功率跟踪点 分数阶 极值搜索 

分 类 号：TM914.4[电气工程—电力电子与电力传动]