Parasitic Effects on the Performance of DC-DC SEPIC in Photovoltaic Maximum Power Point Tracking Applications


This paper presents an analysis of the effect of parasitic resistances on the performance of DC-DC Single Ended Pri- mary Inductor Converter (SEPIC) in photovoltaic maximum power point tracking (MPPT) applications. The energy storage elements incorporated in the SEPIC converter possess parasitic resistances. Although ideal components significantly simplifies model development, but neglecting the parasitic effects in models may sometimes lead to failure in predicting first scale stability and actual performance. Therefore, the effects of parasitics have been taken into consideration for improving the model accuracy, stability, robustness and dynamic performance analysis of the converter. Detail mathematical model of SEPIC converter including inductive parasitic has been developed. The performance of the converter in tracking MPP at different irradiance levels has been analyzed for variation in parasitic resistance. The converter efficiency has been found above 83% for insolation level of 600 W/m2 when the parasitic resistance in the energy storage element has been ignored. However, as the parasitic resistance of both of the inductor has increased to 1 ohm, a fraction of the power managed by the converter has dissipated; as a result the efficiency of the converter has reduced to 78% for the same insolation profile. Although the increasing value of the parasitic has assisted the converter to converge quickly to reach the maximum power point. Furthermore it has also been observed that the peak to peak load current ripple is reduced. The obtained simulation results have validated the competent of the MPPT converter model.

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N. Mohammad, M. Quamruzzaman, M. Hossain and M. Alam, "Parasitic Effects on the Performance of DC-DC SEPIC in Photovoltaic Maximum Power Point Tracking Applications," Smart Grid and Renewable Energy, Vol. 4 No. 1, 2013, pp. 113-121. doi: 10.4236/sgre.2013.41014.

Conflicts of Interest

The authors declare no conflicts of interest.


[1] M. Veerachary, “Power Tracking for Nonlinear PV Sources with Coupled Inductor SEPIC Converter,” IEEE Transactions on Aerospace and Electronic Systems, Vol. 41, No. 3, 2005, pp. 1019-1029. doi:10.1109/TAES.2005.1541446
[2] J. Hu, A. D. Sagneri, J. M. Rivas, Y. Han and D. J. Perreault, “High-Frequency Resonant SEPIC Converter with Wide Input and Output Voltage Ranges,” IEEE Transactions on Power Electronics, Vol. 27, No. 1, 2012, pp. 189-200. doi:10.1109/TPEL.2011.2149543
[3] S. B. Kjaer, J. K. Pdersen and F. Blaabjerg, “Modeling and Control of PV Charger System with SEPIC Converter,” IEEE Transactions on Industrial Electronics, Vol. 56, No. 11, 2009, pp. 4344-4353. doi:10.1109/TIE.2008.2005144
[4] R. M. Middlebrook and S. Cuk, “A General Unified Approach to Modeling Switching Converter Power Stages,” Proceedings of IEEE Power Electronical Special Conference, Vol. 4, 1976, pp. 18-34.
[5] A. Safari and S. Mekhilef, “Simulation and Hardware Implementation of Incremental Conductance MPPT with Direct Control Method Using Cuk Converter,” IEEE Transactions on Industrial Electronics, Vol. 58, No. 4, 2011, pp. 1154-1161. doi:10.1109/TIE.2010.2048834
[6] S. C. Tan, “Constant-Frequency Reduced-State Sliding Mode Current Controller for Cuk Converters,” IET Power Electronics, Vol. 1, No. 4, 2008, pp. 466-477. doi:10.1049/iet-pel:20070369
[7] J. Knight, S. Shirsavar and W. Holderbaum, “An Improved Reliability Cuk Based Solar Inverter with Sliding Mode Control,” IEEE Transactions on Power Electronics, Vol. 21, No. 4, 2006, pp. 1107-1115. doi:10.1109/TPEL.2006.876786
[8] D. B. Costa and C. M. C. Duarte, “The ZVS-PWM Active-Clamping Cuk Converter,” IEEE Transactions on Industrial Electronics, Vol. 51, No. 1, 2004, pp. 54-60. doi:10.1109/TIE.2003.819697
[9] B. R. McGee and R. M. Nelms, “Using a Cuk Converter to Interface a Pulsed Load to a Fuel Cell,” Energy Conversion Engineering Conference, 29-31 July 2004, pp. 313-318.
[10] D. Martins and G. de Abreu, “Application of the Zeta Converter in Switch-Mode Power Supplies,” Applied Power Electronics Conference and Exposition, San Diego, 7-11 March 1993, pp. 214-220. doi:10.1109/APEC.1993.290628
[11] D. C. Martins, F. S. Campos and I. Barbi, “Zeta Converter with High Power Factor Operating in Continuous Conduction Mode,” 18th International Telecommunications Energy Conference, Boston, 6-10 October 1996, pp. 107-113. doi:10.1109/INTLEC.1996.572387
[12] S. Yu, R. Zhao and A. Kwasinski, “Design Considerations of a Multiple-Input Isolated Single Ended Primary Inductor Converter (SEPIC) for Distributed Generation Sources,” Energy Conversion Congress and Exposition (ECCE), Phoenix, 17-22 September 2001, pp. 3960-3967.
[13] A. El Shahat, “Stand-Alone PV System Simulation for DG Applications,” Journal of Automation & Systems Engineering, Vol. 6, No. 1, 2012, pp. 55-72.
[14] R. Zhao and A. Kwasinski, “Multiple-Input Single Ended Primary Inductor Converter (SEPIC) Converter Distributed Generation Applications,” Energy Conversion Congress and Exposition, 20-24 September 2009, pp. 1847-1854.
[15] N. Kalja and S. P. Rao, “SEPIC Converters Solve Automotive Power Needs,” Maxim Power Electronics Technology, Vol. 35, No. 4, 2009, p. 16.
[16] S. Maniktala, “Switching Power Supplies A to Z,” Elsevier, London, 2003.
[17] S. K. Mazumder, A. H. Nayfeh and D. Boroyevich, “Theoretical and Experimental Investigation of the Fastand Slow-Scale Instabilities of a DC-DC Converter,” IEEE Transactions on Power Electronics, Vol. 16, No. 2, 2001, pp. 201-216. doi:10.1109/63.911144
[18] A. Davoudi and J. Jatskevich, “Parasitics Realization in State-Space Average-Value Modeling of PWM DC-DC Converters,” IEEE Transactions on Circuits and Systems, Vol. 54, No. 9, 2007, pp. 1003-10012.
[19] S. M. Szee, “Semiconductor Physic and Devices,” 3rd Edition, John Willy and Sons, Chichester, 2003.
[20] V. Salas, E. Olias, A. Barrado and A. Lazaro, “Review of the Maximum Power Point Tracking Algorithms for Stand-Alone Photovoltaic Systems,” Journal of Solar Energy Materials & Solar Cells, Vol. 90, No. 11, 2006, pp. 1555-1578. doi:10.1016/j.solmat.2005.10.023
[21] T. Esram and P. L. Chapman, “Comparison of Photovoltaic Array Maximum Power Point Tracking Techniques,” IEEE Transactions on Energy Conversion, Vol. 22, No. 2, 2007, pp. 439-449. doi:10.1109/TEC.2006.874230
[22] Z. Salameh and D. Taylor, “Step-Up Maximum Power Point Tracker for Photovoltaic Arrays,” Solar Energy, Vol. 44, No. 1, 1990, pp. 57-61. doi:10.1016/0038-092X(90)90027-A
[23] K. Hussein, I. Muta, T. Hoshino and M. Osakada, “Maximum Photovoltaic Power Tracking: An Algorithm for Rapidly Changing Atmospheric Conditions,” Proceedings of IEEE Generation, Transmission and Distribution Conference, Vol. 142, No. 1, 1995, pp. 59-64.
[24] N. Femia, G. Petrone, G. Spagnuolo and M. Vitelli, “Optimizing Sampling Rate of P&O MPPT Technique,” Proceedings of IEEE Power Electronical Special Conference, Vol. 3, 2004, pp. 1945-1949. doi:10.1109/PESC.2004.1355415
[25] C.-X. Liu and L.-Q. Liu, “An Improved Perturbation and Observation MPPT Method of Photovoltaic Generate System,” 4th IEEE Conference on Industrial Electronics and Applications, Xi’an, 25-27 May 2009, pp. 2966-2970.
[26] (IP&O) of MPPT Control for Photovoltaic Power Systems,” in Proc. IEEE Photovoltaic Spec. Conf., 2005, pp. 1788-1791.
[27] D. Sera, T. Kerekes, R. Teodorescu and F. Blaabjerg, “Improved MPPT Algorithms for Rapidly Changing Environmental Conditions,” Power Electronics and Motion Control Conference, Portoroz, 30 August-1 September 2006, pp. 1614-1619.
[28] C. Hua and C. Shen, “Study of Maximum Power Tracking Techniques and Control of DC-DC Converters for Photovoltaic Power System,” 29th Annual IEEE Power Electronics Specialists Conference, New York, 17-22 May 1998, pp. 86-93.
[29] N. Mohan, M. T. Undeland and P. W. Robbins, “Power Electronics, Converters, Application and Design,” 2nd Edition, John Willey & Sons, Chichester, 2003.
[30] M. H. Rashid, “Power Electronic Circuits, Devices and Applications,” 2nd Edition, Tata McGraw-Hill Publishing Company Limited, New Delhi, 2009.
[31] V. Michal, “Modulated-Ramp PWM Generator for Linear Control of the Boost Converter’s Power Stage,” IEEE Transactions on Power Electronics, Vol. 27, No. 6, 2012, pp. 2958-2965. doi:10.1109/TPEL.2011.2176962
[32] M. Simulink, “User’s Manual,” The Math Works, Inc., New York.
[33] “Poly-Crystalline Silicon Photovoltaic Modules Datasheet: Malaysia,” 2012.

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