A Voltage Based Maximum Power Point Tracker for Low Power and Low Cost Photovoltaic Applications
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A Voltage Based Maximum Power Point Tracker for Low Power and Low Cost Photovoltaic Applications

Authors: Jawad Ahmad, Hee-Jun Kim

Abstract:

This paper describes the design of a voltage based maximum power point tracker (MPPT) for photovoltaic (PV) applications. Of the various MPPT methods, the voltage based method is considered to be the simplest and cost effective. The major disadvantage of this method is that the PV array is disconnected from the load for the sampling of its open circuit voltage, which inevitably results in power loss. Another disadvantage, in case of rapid irradiance variation, is that if the duration between two successive samplings, called the sampling period, is too long there is a considerable loss. This is because the output voltage of the PV array follows the unchanged reference during one sampling period. Once a maximum power point (MPP) is tracked and a change in irradiation occurs between two successive samplings, then the new MPP is not tracked until the next sampling of the PV array voltage. This paper proposes an MPPT circuit in which the sampling interval of the PV array voltage, and the sampling period have been shortened. The sample and hold circuit has also been simplified. The proposed circuit does not utilize a microcontroller or a digital signal processor and is thus suitable for low cost and low power applications.

Keywords: Maximum power point tracker, Sample and hold amplifier, Sampling interval, Sampling period.

Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1072062

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References:


[1] R. Faranda, S. Leva, V. Maugeri, "MPPT techniques for pv systems: energetic and cost comparison." Proceedings of IEEE Power and Energy Society General Meeting- Conversion and Delivery of Electrical Energy in the 21st Century, 2008, pp. 1-6.
[2] M.A.S. Masoum, H. Dehbonei, "Design construction and testing of a voltage-based maximum power point tracker for small satellite power supply", Proceedings of 13th annual AIAA/USU Conference on Small Satellite, August 1999.
[3] V. Salas, E. Olias, A. Barrado, and A. Lazaro, "Review of maximum power point tracking algorithms for stand alone photovoltaic systems." Solar Matter, Solar Cells, vol. 90, no. 11, pp. 1555-1578, July 2006.
[4] Abu Tariq, M.S. Jamil, "Development of analog maximum power point tracker for photovoltaic panel." Proceedings of IEEE International Conference on Power Electronic Drive Systems, 2005, PEDS 2005, pp. 251-255.
[5] M.A.S. Masoum, H. Dehbonei, "Theoretical and experimental analysis of photovoltaic systems with voltage and current based maximum power point trackers", IEEE Transactions on Energy Conversion, vol. 17, NO. 4, pp. 514-522, Dec 2002.
[6] J.H.R. Enslin, M.S. Wolf, D.B. Snyman and W. Swiegers, "Integrated photovoltaic maximum power point tracking converter", IEEE Transactions on Industrial Electronics, vol 44, pp. 769-773, December 1997.
[7] Farhan Simjee, Pai H. Chou, " Everlast: long life, supercapacitor-operated wireless sensor node", Proceedings of 2006 International Symposium on Low Power Electronics and Design, pp. 197-202.
[8] M. Bodur and M. Ermis, " Maximum power point tracking for low power photovoltaic solar planels." Proceedings of 7th Mediterranean Electrotechnical Conference, 1994, pp. 758-761.
[9] A.K. Mukerjee, Nivedita Dasgupta, " DC power supply used as photovoltaic simulator for testing mppt algorithms.", Renewable Energy, vol. 32, no. 4, pp. 587-592, 2007.
[10] Pattrick Griffith, "Designing switching voltage regulators with TL 494." Texas Instruments Application Report. Available: http://focus.ti.com/lit/an/slva001d/slva001d.pdf
[11] Analog Devices Inc, AD 781: Complete 700ns Sample and Hold Amplifier, Datasheet.
[12] Fairchild Semiconductors Inc, 74LS221: Dual Non-Retriggerable One- Shot, Datasheet.
[13] "Special sample and hold techniques", National Semiconductor, Application Report 294. Available: http://www.national.com/an/AN/AN- 294.pdf