A variable step size INC MPPT method for PV systems

被引：861

作者：

Liu, Fangrui ^{[1
]}

Duan, Shanxu ^{[1
]}

Liu, Fei ^{[1
]}

Liu, Bangyin ^{[1
]}

Kang, Yong ^{[1
]}

机构：

[1] Huazhong Univ Sci & Technol, Coll Elect & Elect Engn, Wuhan 430074, Peoples R China

来源：

IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS | 2008年 / 55卷 / 07期

基金：

中国国家自然科学基金;

关键词：

incremental conductance (INC); maximum power point tracking (MPPT); variable step size;

D O I：

10.1109/TIE.2008.920550

中图分类号：

TP [自动化技术、计算机技术];

学科分类号：

0812 ;

摘要：

Maximum power point tracking (MPPT) techniques are employed in photovoltaic (PV) systems to make full utilization of PV array output power which depends on solar irradiation and ambient temperature. Among all the MPPT strategies, the incremental conductance (INC) algorithm is widely used due to the high tracking accuracy at steady state and good adaptability to the rapidly changing atmospheric conditions. In this paper, a modified variable step size INC MPPT algorithm is proposed, which automatically adjusts the step size to track the PV array maximum power point. Compared with the conventional fixed step size method, the proposed approach can effectively improve the MPPT speed and accuracy simultaneously. Furthermore, it is simple and can be easily implemented in digital signal processors. A theoretical analysis and the design principle of the proposed method are provided and its feasibility is also verified by simulation and experimental results.

引用

页码：2622 / 2628

页数：7

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