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Journal of Control Science and Engineering
Volume 2016, Article ID 3242069, 10 pages
http://dx.doi.org/10.1155/2016/3242069
Research Article

An Improved MPPT Algorithm for PV Generation Applications Based on - Curve Reconstitution

School of Electrical Engineering, Zhengzhou University, Zhengzhou 450001, China

Received 22 January 2016; Revised 26 May 2016; Accepted 29 May 2016

Academic Editor: Ahmed M. Massoud

Copyright © 2016 Yaoqiang Wang et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

The output power of PV array changes with the variation of environmental factors, such as temperature and solar irradiation. Therefore, a maximum power point (MPP) tracking (MPPT) algorithm is essential for the photovoltaic generation system. However, the curve changes dynamically with the variation of the environmental factors; here, the misjudgment may occur if a simple perturb-and-observe (P&O) MPPT algorithm is used. In order to solve this problem, this paper takes MPPT as the main research object, and an improved MPPT algorithm for PV generation applications based on curve reconstitution is proposed. Firstly, the mathematical model of PV array is presented, and then the output dynamic characteristics are analyzed. Based on this, a curve reconstitution strategy is introduced, and the improved MPPT algorithm is proposed. At last, simulation and comparative analysis are conducted. Results show that, with the proposed algorithm, MPP is tracked accurately, and the misjudgment problem is solved effectively.