Journal of the Korea Academia-Industrial cooperation Society (한국산학기술학회논문지)

The Korea Academia-Industrial cooperation Society (한국산학기술학회)
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Study on maximum power point tracking method for PV system under varying irradiance

일사량 변동에 대응한 태양광발전시스템의 최대전력 추종기법 연구

  • Yu, Byung-Gyu (Division of Electrical, Electronic and Control Engineering, Kongju National University)
  • 유병규 (공주대학교 전기전자제어공학부)
  • Received : 2013.08.08
  • Accepted : 2013.10.10
  • Published : 2013.10.31
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Abstract

Maximum Power Point Tracking (MPPT) method for Photovoltaic (PV) system is implemented in PV inveter and it generate the maximum electric power from PV cell. MPPT method has been studied to have high efficiency and high tracking speed. However, these studies are basically focused on the performance under fixed irradiance condition. Based on the typical Perturbation and Observation (P&O) method, this paper presents the research results on modified P&O method to have a better performance under varying irradiance condition. The modified P&O method can have a better performance under varying irradiance condition because the additional measurements during the MPPT control period are conducted. The proposed MPPT method is verified by using 250kW PV inverter under linearly varying irradiance condition according to EN 50530.

태양광발전시스템에서 최대전력 추종기법은 태양광 발전용 전력변환장치에 구현되는 기술로써, 태양전지에서 발생할 수 있는 전력을 최대로 추출해 내는 제어 기법이다. 이러한 태양광 발전장치에서의 최대전력 추종기법은 추종효율, 추종 속도 등에 따라 많은 연구가 진행되어 왔다. 하지만, 지금까지의 연구는 일사량 등 환경요인이 고정된 조건에서의 정적 최대전력 추종 성능 개선에 집중해 왔다. 본 논문에서는 대표적인 최대전력 추종 기법인 외란 후 관찰에 의한 기법을 바탕으로 해서, 일사량이 변화하는 조건에서도 최대전력 추종 성능을 높일 수 있는 수정된 외란 후 관찰 기법을 제안한다. 제안된 기법은 최대전력 추종 제어주기 동안 추가적인 태양전지 전압/전류 계측으로 인해 일사량 변화시에도 높은 성능을 보일 수 있게 된다. 본 제안 내용의 타당성은 EN50530기준을 바탕으로 250kW 태양광 인버터를 사용해서, 실험을 통해서 검증하였다.

Keywords

References

  1. T. Esram, and P. L. Chapman "Comparison of photovoltaic array maximum power point tracking techniques", IEEE Transactions on Energy Conversion, 22:439-449, 2007 DOI: http://dx.doi.org/10.1109/TEC.2006.874230
  2. N. Femia, G. Petrone, G. Spagnuolo, and M. Vitelli, "Optimization of perturb and observe maximum power point trackingmethod", IEEE Transactions on Power Electronics, 20:963-973, 2005. DOI: http://dx.doi.org/10.1109/TPEL.2005.850975
  3. C. Hua and C. Shen, "Comparative study of peak power tracking techniques for solar storage system". in Proc. APEC, 679-685, 1998. DOI: http://dx.doi.org/10.1109/APEC.1998.653972
  4. M. Soum, H. Dehbonei, and E. F. Fuchs, "Theoretical and experimental analyses of photovoltaic systems with voltage and current-based maximum power point tracking", IEEE Transactions on Energy Conversion, 17:514-522, 2002. DOI: http://dx.doi.org/10.1109/TEC.2002.805205
  5. J.L., Agorreta, L. Reinaldos, R. Gonzalez, M. Borrega, J. Balda, and L. Marroyo, "Fuzzy switching techniqueapplied to PWM boost converter operating in mixed conduction mode for PV systems", IEEE Transactions on Industrial Electronics, 56:4363-4373, 2009. DOI: http://dx.doi.org/10.1109/TIE.2009.2019567
  6. L. Zhang, Y. Bai, and A. Al-Amoudi, "GA-RBF neural network based maximum power point tracking for grid-connected photovoltaic systems", in Proc. Int. Conf. Power Electronics, Machines and Drives, 18-23, 2002. DOI: http://dx.doi.org/10.1049/cp:20020083
  7. D. Sera, R. Teodorescu, J. Hantschel, and M. Knoll, "Optimized maximum power point tracker for fast-changing enviromental conditions", IEEE Transactions on Industrial Electronics, 55:2629-2637, 2008. DOI: http://dx.doi.org/10.1109/TIE.2008.924036
  8. B.K. Bose, P.M. Szczesny and R.L. Steigerwald , "Microcomputer Control of a Residential Photovoltaic Power Condictioning System", IEEE Transactions on Industry Applications, 21:1182-1191, 1985. DOI: http://dx.doi.org/10.1109/TIA.1985.349522
  9. H. Sugimoto and H. Dong, "A New Scheme For Maximum Photovoltaic Power Tracking Control", in Proc. IEEE Power Conversion Conference, 2:691-696, 1997. DOI: http://dx.doi.org/10.1109/PCCON.1997.638281
  10. K. H. Hussein, I. Muta, T. Hoshino, and M. Osakada, "Maximum Photovoltaic Power Tracking: an Algorithm for Rapidly Changing Atmospheric Conditions", in Proc IEE on Generation, Transmission, and Distribution, 142: 59-64, 1995. DOI: http://dx.doi.org/10.1049/ip-gtd:19951577
  11. Hiren Patel, Vivek Agarwal, "Maximum Power Point Tracking Scheme for PV Systems Operating Under Partially Shaded Conditions", IEEE transaction on Industrial Electronics, 55:1689-1698, 2008. DOI: http://dx.doi.org/10.1109/TIE.2008.917118
  12. T.Noguchi, S.Togashi and R.Nakamoto, "Short current pulse based maximum power point tracking method for multiple photovoltaic and converter module system", IEEE Transactions on Industrial Electronics. 49:217-223, 2002. DOI: http://dx.doi.org/10.1109/41.982265
  13. Eurpean Standard EN50530, "Overall efficiency of grid connected photovoltaic inverters", 2010.