Journal of the Korean Solar Energy Society (한국태양에너지학회 논문집)

The Korean Solar Energy Society (한국태양에너지학회)
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Electric Circuit Analysis for PV Array on Short-Circuit Failure of Bypass Diode in PV Module

PV모듈의 바이패스 다이오드 단락 고장 시 태양광어레이 회로 특성분석

  • Lee, Chung-Geun (Graduate School of Energy Science and Technology, Chungnam National University) ;
  • Shin, Woo-Gyun (Photovoltaic Laboratory, Korea Institute of Energy Research) ;
  • Lim, Jong Rok (Photovoltaic Laboratory, Korea Institute of Energy Research) ;
  • Hwang, Hye-Mi (Photovoltaic Laboratory, Korea Institute of Energy Research) ;
  • Ju, Young-Chul (Photovoltaic Laboratory, Korea Institute of Energy Research) ;
  • Jung, Young-Seok (Photovoltaic Laboratory, Korea Institute of Energy Research) ;
  • Kang, Gi-Hwan (Photovoltaic Laboratory, Korea Institute of Energy Research) ;
  • Chang, Hyo-Sik (Graduate School of Energy Science and Technology, Chungnam National University) ;
  • Ko, Suk-Whan (Photovoltaic Laboratory, Korea Institute of Energy Research)
  • 이충근 (충남대학교 에너지과학기술대학원) ;
  • 신우균 (한국에너지기술연구원 태양광연구실) ;
  • 임종록 (한국에너지기술연구원 태양광연구실) ;
  • 황혜미 (한국에너지기술연구원 태양광연구실) ;
  • 주영철 (한국에너지기술연구원 태양광연구실) ;
  • 정영석 (한국에너지기술연구원 태양광연구실) ;
  • 강기환 (한국에너지기술연구원 태양광연구실) ;
  • 장효식 (충남대학교 에너지과학기술대학원) ;
  • 고석환 (한국에너지기술연구원 태양광연구실)
  • Received : 2019.10.03
  • Accepted : 2019.11.08
  • Published : 2019.12.30
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Abstract

As the installation of photovoltaic systems increases, fire accidents of PV system grow every year. Most of PV system fires have been reported to be caused by electrical components. The majority of fire accidents occurred in combiner box, which is presumed to be short-circuit accidents due to dustproof and waterproof failures or heat deterioration of blocking diode. For this reason, the blocking diode installation became optional by revised PV combiner regulation. In this paper, according to the revised regulation, reverse current that generated by voltage mismatch was measured and analyzed in PV array without a blocking diode. The factors that cause voltage mismatch in array are assumed to be shaded PV module and short circuit failure of bypass diode. As the result of experiment, there is no reverse current to flow under shading condition in module, but reverse current flows on the failure of bypass diode in module. According to the module's I-V characteristic curve analysis, open voltage was slightly reduced due to operation of bypass diode in shading. However, it showed that open circuit voltage has decreased significantly in the failure of bypass diode. This indicates that the difference in open voltage reduction of voltage mismatch factor causes reverse current to flow.

Keywords

References

  1. Lee, J. S., Heo, J. P., Kim, S. J., Choi, W. G., Lee, W. J., Lee, S. M., and Jeong, Y. S., The Experimental Study on the Characteristics of the Photovoltaic System Fire, Journal of Fire Investigation Society of Korea, Vol. 9, pp. 15-36, 2018.
  2. Laukamp, H., Bopp, G., Grab, R., Wittwer, C., Haberlin, H., Heeckeren, B., Phillip, S., Reil, F., Schmidt, H., Sepanski, A., Thiem, H., and Vaassen, W., PV Fire Hazard-Analysis and Assessment of Fire Incidents, 26th EUPVSEC, 2013.
  3. Klise, G. T., Lavrova, O., and Gooding, R, PV System Component Fault and Failure Compilation and Analysis, Sandia Report, No. SAND-2018-1743, 2018.
  4. IEC TS 62257-7-1:2010, Recommendations for small renewable energy and hybrid systems for rural electrification - Part 7-1: Generators - Photovoltaic generators.
  5. KS C 8567:2019, Photovoltaic combiner box.
  6. Belhacaht, F. and Larbes, C, Modeling, Analysis and Comparison of Solar Photovoltaics Array Configuration Under Partial Shading Conditions, Solar Energy, Vol. 120, pp. 399-418, 2015. https://doi.org/10.1016/j.solener.2015.07.039
  7. Jung, T. H., Ko, J. W., Kang, G. H., and Ahn, H. K., Output Characteristics of PV Module Considering Partially Reverse Biased Conditions, Solar Energy, Vol. 92, pp. 214-220, 2013. https://doi.org/10.1016/j.solener.2013.03.015
  8. Abete, A., Barbisio, E., Cane, F., and Demartini, P., Analysis of Photovoltaic Modules with Protection Diodes in Presence of Mismatching, 21st IEEE PV Specialists Conference, pp. 1005-1010, 1990.
  9. Alonso-Garcia, M. C., Ruiz, J. M., and Chenlo, F., Experimental Study of Mismatch and Shading Effects in the I-V Characteristic of a Photovoltaic Module, Solar Energy Material and Solar Cells, Vol. 90, pp. 329-340, 2006. https://doi.org/10.1016/j.solmat.2005.04.022
  10. Silvestre, S., Boronat, A., and Chouder, A., Study of Bypass Diodes Configuration on PV Modules, Applied Energy, Vol. 86, pp. 1632-1640, 2009. https://doi.org/10.1016/j.apenergy.2009.01.020
  11. Kim, S. T., Kang, G. H., Park, J. H., Ahn, H. K., YU, G. J., and Han, D. Y., The Electrical Characteristics of Shading Effect in Photovoltaic Module, Journal of the Korean Solar Energy Society, pp. 257-262, 2008.
  12. Shin, W., Ko, S., Song, H., Ju, Y., Hwang, H., and Kang, G., Origin of Bypass Diode Fault in c-Si Photovoltaic Modules: Leakage Current under High Surrounding Temperature, Energies, Vol. 11, p. 2416, 2018 https://doi.org/10.3390/en11092416
  13. Shin, W. G., Jung, T. H., Ko, S. W., Ju, Y. C., Chang, H. S., and Kang, G. H., Analysis on Thermal & Electrical Characteristics Variation of PV Module with Damaged Bypass Diodes, Journal of the Korean Solar Energy Society Vol. 35, pp. 67-75, 2015. https://doi.org/10.7836/kses.2015.35.4.067
  14. Jung, T. H., Kang, G. H., & Ahn, H. K., Optimal Design of PV Module with Bypass Diode to Reduce Degradation due to Reverse Excess Current, Transactions on Electrical and Electronic Materials, Vol. 15, pp. 279-283, 2014. https://doi.org/10.4313/TEEM.2014.15.5.279
  15. Petrone, G. and Ramos-Paja, C. A., Modeling of Photovoltaic Fields in Mismatched Conditions for Energy Yield Evaluations, Electric Power Systems Research, Vol. 81, pp. 1003-1013, 2011. https://doi.org/10.1016/j.epsr.2010.12.008
  16. Ko, S. W., Ju, Y. C., Hwang, H. M., So, J. H., Jung, Y. S., Song, H .J., Song, H. E., Kim, S. H., and Kang, G. H., Electrical and Thermal Characteristics of Photovoltaic Modules Under Partial Shading and with a Damaged Bypass Diode, Energy, Vol. 128, pp. 232-243, 2017. https://doi.org/10.1016/j.energy.2017.04.030
  17. Ko, S. W., Ju, Y. C., So, J. H., Hwang, H. M., Jung, Y. S., and Kang, G. H., The Characteristics of PV Module Under the Partial Shading Condition and with a Failure of Bypass Diode with Short, Journal of the Korean Solar Energy Society, Vol. 36, No. 4, pp. 41-47, 2016. https://doi.org/10.7836/kses.2016.36.4.041