一种基于最优电流控制适应多变环境条件的光伏系统MPPT策略研究  

An OCC-Based MPPT Technique for PV Generation under Variable Environmental Conditions

作　　者：王璟 田春筝 李秋燕 丁岩 王利利 蒋小亮 赵健[2] WANG Jing;TIAN Chunzheng;LI Qiuyan;DING Yan;WANG Lili;JIANG Xiaoliang;ZHAO Jian(State Grid Henan Economic Research Institute,Zhengzhou 450006,Henan,China;Tianjin University,Tianjin 300072,China)

机构地区：[1]国网河南省电力公司经济技术研究院,河南郑州450006 [2]天津大学,天津300072

出　　处：《电网与清洁能源》2018年第6期61-68,共8页Power System and Clean Energy

基　　金：国家自然科学基金(50877053)~~

摘　　要：在时变环境参数与运行电流之间确定了一种精确的非线性函数关系,从而在时变环境条件下基于模型参数优化实现了一种新型的最大功率跟踪控制策略。该控制方法在任意光照及温度条件下直接以最大功率点对应的运行电压或电流为控制目标来实现最大功率跟踪控制;基于所确定的非线性关系发现了最大功率点运行电流对光照在较大的区域内具有较强的相关性。仿真实验证明该控制策略能够实时精确地跟踪最大功率点功率,即使在低辐照度条件下同样表现出良好的精确性及无振动性。This paper describes a novel method for maximum power point tracking control in parameters optimization corresponding to variable weather conditions. The proposed method serves to find out the output voltage or current of solar cell corresponding to the maximum power point(MPP) under the variable temperature and irradiation conditions to track the maximum power point. The results show a definable nonlinear relationship between the variable weather parameters and the output current of the solar cell at MPP both theoretically and experimentally. And this research gives the mathematical expression of it. Furthermore,MPPT control rules are created based on the findings from nonlinear relation that can respond at high speeds to variations in irradiation and the temperature of solar cell. Based on that, MATLAB/Simulink numerical simulations are presented,in order to illustrate that this control algorithm can implement the MPP of PV generation system efficiently even in the low solar irradiation condition.

关 键 词：光伏系统 最大功率跟踪 最优电流控制 辐照度 

分 类 号：TM734[电气工程—电力系统及自动化]