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International Journal of Photoenergy
Volume 2015, Article ID 979267, 10 pages
http://dx.doi.org/10.1155/2015/979267
Research Article

Matlab-Based Modeling and Simulations to Study the Performance of Different MPPT Techniques Used for Photovoltaic Systems under Partially Shaded Conditions

1Intelligent Control System Laboratory, Yonsei University, Shin Chon Campus, B2 Building 723, Seoul 120-749, Republic of Korea
2Advanced R&D Team, Samsung Electronics Co. Ltd., Suwon, Republic of Korea
3MathWorks Korea, LLC, Gangnam-gu, Seoul, Republic of Korea
4Hankyong National University, Anseong Campus, S Building 409, Kyonggi-do, Republic of Korea

Received 8 October 2014; Revised 17 December 2014; Accepted 20 December 2014

Academic Editor: Wayne A. Anderson

Copyright © 2015 Jehun Hahm 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

A pulse-width-modulator- (PWM-) based sliding mode controller is developed to study the effects of partial shade, temperature, and insolation on the performance of maximum power point tracking (MPPT) used in photovoltaic (PV) systems. Under partially shaded conditions and temperature, PV array characteristics become more complex, with multiple power-voltage maxima. MPPT is an automatic control technique to adjust power interfaces and deliver power for a diverse range of insolation values, temperatures, and partially shaded modules. The PV system is tested using two conventional algorithms: the Perturb and Observe (P&O) algorithm and the Incremental Conductance (IncCond) algorithm, which are simple to implement for a PV array. The proposed method applied a model to simulate the performance of the PV system for solar energy usage, which is compared to the conventional methods under nonuniform insolation improving the PV system utilization efficiency and allowing optimization of the system performance. The PWM-based sliding mode controller successfully overcomes the issues presented by nonuniform conditions and tracks the global MPP. In this paper, the PV system consists of a solar module under shade connected to a boost converter that is controlled by three different algorithms and is generated using Matlab/Simulink.