Decoupling of Power in A Solar PV System Employing A Partial Power Processing Converter

Authors

  • N. Sudarsan Rao  Assistant Professor, Electrical And Electronics Engineering, Sree Venkateswara College of Engineering-Nellore, Andhra Pradesh, India
  • O. Thireesh  Assistant Professor, Electrical And Electronics Engineering, Sree Venkateswara College of Engineering-Nellore, Andhra Pradesh, India
  • P. Chinnari  Electrical And Electronics Engineering, Sree Venkateswara College of Engineering-Nellore, Andhra Pradesh, India
  • M. Divakar  Electrical And Electronics Engineering, Sree Venkateswara College of Engineering-Nellore, Andhra Pradesh, India
  • M. P. Vamsi Krishna  Electrical And Electronics Engineering, Sree Venkateswara College of Engineering-Nellore, Andhra Pradesh, India
  • SK. Afridi  Electrical And Electronics Engineering, Sree Venkateswara College of Engineering-Nellore, Andhra Pradesh, India

Keywords:

DC-DC converter, distributed maximum power tracking (DMPPT), Partial power processing (PPP), maximum power point (MPP), partial shading, PV characteristics.

Abstract

To interconnect solar photovoltaic (PV) with the single phase grid, DC/AC inverters are used as interface. For tracking maximum power from each solar PV string, DC/DC converters are connected between solar PV strings and in- verters. This ensures each strings operates at its maximum power output irrespective of variation in solar radiation among different strings. Conventionally, DC-DC converter used for this application would process the complete power of the string. This full power processing (FPP), architecture leads to high conversion losses. This paper suggests a flyback based par- tial power processing converter, which offers high conversion efficiency, as compared to conventional dc-dc converters. In addition, the proposed scheme also eliminates low frequency (twice the power frequency) oscillations in string voltage in case of single phase inverters, thereby increasing the power extraction efficiency. Key advantages of the proposed scheme are power decoupling, low conversions losses, high extraction efficiency and distributed maximum power point tracking (DMPPT). Detailed simulation studies are performed to validate the performance of the proposed scheme. Comparison of the proposed scheme with the conventional full power processing scheme is also included.

References

  1. A. Elasser et al. “ A Comparative Study of Central and Distributed MPPT Architectures for Megawatt Utility and Large Scale Commercial Photovoltaic Plants ,” Proceedings of Ind. Electron. Conference, IECON 2010, pp. 2753-2758.
  2. M. Kasper, D. Bortis, J.W.Kolar , “Classification and Comparative Evaluation of PV Panel-Integrated DC/DC Converter Concepts,” IEEE Trans. Power Electron.,vol. 29, no. 5, pp. 2511-2526, May. 2014.
  3. G. R. Walker and P. C. Sernia, “Cascaded dcdc converter connection of photovoltaic modules,” IEEE Trans. Power Electron., vol. 19, no. 4,pp. 11301139, Jul. 2004.
  4. G. R. Walker and J.Pierce,“PhotoVoltaic DC-DC Module integrated Converter for Novel Cascade and Bypass Grid Connection topologies- Design and optimisation,” in Proc. of Power Electron. Specialist. Conf. PESC 2006,pp. 1-7, 18-22 June 2006.
  5. G. Yao, L. Hu, Y. Liu, L. Chen, and X. He, “Interleaved Three-Level Boost Converter with Zero Diode Reverse Recovery Loss,” inProc. of Applied Power Electronics Conference (APEC)2004, pp. 1090-1095
  6. R. Steigerwald, “A Comparison of Half-Bridge Resonant Converter Topologies,” IEEE Trans. Power Electron., Vol. 3, No. 2, pp. 174-182, April 1988.
  7. M.S Agamyet al., “An Efficient Partial Power Processing DC/DC Con- verter for Distributed PV Architectures, ” IEEE Trans. Power Electron., vol. 29, no. 2, pp. 674-686, Feb. 2014. T. Suntio and A. Kuperman, “Comments on An Efficient Partial Power Processing DC/DC Converter for Distributed PV Architectures”,” IEEE Trans. Power Electron., vol.30, no.4, pp.2372-2372, April 2015.
  8. P. S. Shenoy, K. A. Kim, B. B. Johnson, and P.T.Krein, “Differential power processing for increased energy production and reliability of photovoltaic systems,” IEEE Trans. Power Electron., vol. 28, no. 6, pp. 2968-2979. Jun. 2013.
  9. C. Olalla, D. Clement, M. Rodriguez, and D. Maksimovic, “Archi- tectures and control of submodule integrated DC-DC converters for photovoltaic applications,” IEEE Trans. Power Electron., vol. 28, no. 6, pp. 2980-2997,Jun. 2013.
  10. J. Lee, B. Min, T. Kim, D. Yoo, and J. Yoo, “High Efficient In- terleaved Input-Series-Output-Parallel-Connected DC/DC Converter for Photovoltaic Power Conditioning System,” in Proc. of Energy Conver. Conf. and Expo, ECCE 2009, pp. 327-329.
  11. C. Schaef, K. Kesarwani, and J. T. Stauth, “A coupled-inductormulti- level ladder converter for sub-module PV power management,” in Proc. IEEE Appl. Power Electron. Conf., 2013, pp. 732-737.
  12. S. Ben-Yaakov, A. Blumenfeld, A. Cervera, and M. Evzelman, “Design and evaluation of a modular resonant switched capacitors equalizer for PV panels,” in Proc. IEEE Energy Convers. Congr. Expo., 2012, pp. 4129-4136.
  13. J. T. Stauth,M. Seeman, and K. Kesarwani, “Resonant switched- capacitor converters for sub-module distributed photovoltaic power management,”IEEE Trans. Power Electron., vol. 28, no. 3, pp. 1189- 1198, Mar. 2013.
  14. Junjian Zhao; K. Yeates, Yehui Han, “Analysis of high efficiency DC/DC converter processing partial input/output power,” IEEE 14th Workshop on Control and Modeling for Power Electron.,COMPEL ,vol. 28, 23-26 June. 2013, pp. 1-8.
  15. Ho-sung kim, Jong-Hyun Kim, Byung-Duk Min, Dong-Wook Yoo, and Hee-Je Kim, “A highly efficient PV system using a series connection of DCDC converter output with a photovoltaic panel,” Renewable Energy, vol. 34, Issue 11, pp. 24322436, Sept. 2009.
  16. A. Bidram, A. Davoudi, R.S. Balog,“Control and Circuit Techniques to Mitigate Partial Shading Effects in Photovoltaic Arrays,” IEEE J. Photovoltaics, vol. 2, no. 4, pp.532-546, Oct. 2012
  17. D. Graovac, M. Purschel , A. Kiep, “MOSFET power losses calculation using the data-sheet parameters,” Application Note, vol. 1.1,Jul.2006.
  18. W.T. Mclyman, “Transformer and inductor design handbook,” Third Edition, Kg Magnetics, Inc., USA 2004.

International Journal of Scientific Research in Science and Technology

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Published

2022-06-30

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Volume 9, Issue 3, May-June-2022

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Research Articles

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[1]
N. Sudarsan Rao, O. Thireesh, P. Chinnari, M. Divakar, M. P. Vamsi Krishna, SK. Afridi "Decoupling of Power in A Solar PV System Employing A Partial Power Processing Converter" International Journal of Scientific Research in Science and Technology(IJSRST), Online ISSN : 2395-602X, Print ISSN : 2395-6011,Volume 9, Issue 3, pp.650-659, May-June-2022.