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A Maximum Power Point Tracker for PV Panels Using SEPIC Converter

Authors: S. Ganesh, J. Janani, G. Besliya Angel


Photovoltaic (PV) energy is one of the most important renewable energy sources. Maximum Power Point Tracking (MPPT) techniques should be used in photovoltaic systems to maximize the PV panel output power by tracking continuously the maximum power point which depends on panel’s temperature and on irradiance conditions. Incremental conductance control method has been used as MPPT algorithm. The methodology is based on connecting a pulse width modulated dc/dc SEPIC converter, which is controlled by a microprocessor based unit. The SEPIC converter is one of the buck-boost converters which maintain the output voltage as constant irrespective of the solar isolation level. By adjusting the switching frequency of the converter the maximum power point has been achieved. The main difference between the method used in the proposed MPPT systems and other technique used in the past is that PV array output power is used to directly control the dc/dc converter thus reducing the complexity of the system. The resulting system has high efficiency, low cost and can be easily modified. The tracking capability has been verified experimentally with a 10 W solar panel under a controlled experimental setup. The SEPIC converter and their control strategies has been analyzed and simulated using Simulink/Matlab software.

Keywords: Microprocessor, maximum power point tracking, PV module, SEPIC converter

Digital Object Identifier (DOI):

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[1] A. Braunstein and Z. Zinger, "On the dynamic optimal coupling of a solar cell array to a load and storage batteries,” IEEE Trans. Power Apparat.Syst., vol. 100, pp. 1183–1188, 1981.
[2] A. Kislovski and R. Redl, "Maximum-power-tracking using positive feedback,” in Proc. IEEE Power Electron. Spec. Conf., 1994, pp. 1065–1068.
[3] J. Gow and C. Manning, "Controller arrangement for boost convertersystems sourced from solar photovoltaic arrays or other maximum power sources,” Proc. Inst. Elect. Eng., vol. 147, no. 1, pp. 15–20, Jan. 2000.
[4] A. Nafeh, F. Fahmy, O. Mahgoub, and E. Abou El-Zahab, "Microprocessor control system for maximum power operation of PV arrays,” Int.J. Numer. Model., vol. 12, pp. 187–195, 1999.
[5] H.S Hung Chung, K.K.Tse "a novel maximum power point tracking technique for a solar panels using a SEPIC or CUK converter.” IEEE Trans power Electronic vol.18 no.3 may 2003.
[6] K.Ktse. S.h Chung "A Novel Maximum Power Point Tracker For PV panels using Switching frequency Modulation” IEEE Trans on power electronics vol 17 no 6 Nov 2002.