Study and Implementation on Batteries Charging Method of Micro-Grid Photovoltaic Systems

DOI: 10.4236/sgre.2011.24037   PDF   HTML     8,591 Downloads   15,284 Views   Citations


In the micro-grid photovoltaic systems, the random changes of solar radiation enable lead-acid batteries to experience low SOC (State of Charge) or overcharged for periods of time if directly charged with such traditional methods as decreased charging current, which will reduce lifetime of batteries. What’s more, it’s difficult to find a proper reduction coefficient in decreasing charging current. To adapt to the random changes of circumstance and avoid selecting the reduction coefficient, a new fast charging method named decreased charging current based on SOC is proposed to apply into micro-grid photovoltaic systems. It combines batteries’ SOC with the maximum charging voltage to determine the charging rate without strictly selecting reduction coefficient. By close-loop current control strategy and related scheme, the experiment proves the new method is feasible and verifies that, comparing with decreased charging current, the improved method make batteries’ SOC reach 100% in shorter time as well as the temperature of batteries raise more slowly.

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T. Wu, Q. Xiao, L. Wu, J. Zhang and M. Wang, "Study and Implementation on Batteries Charging Method of Micro-Grid Photovoltaic Systems," Smart Grid and Renewable Energy, Vol. 2 No. 4, 2011, pp. 324-329. doi: 10.4236/sgre.2011.24037.

Conflicts of Interest

The authors declare no conflicts of interest.


[1] G. J. Zhang, X. Tang and Z. P. Qi, “Application of Hybrid Energy Storage System of Super-Capacitors and Batteries in a Micro-Grid,” Automation of Electric Power Systems, Vol. 34, No. 12, 2010, pp.85-87.
[2] J. H. Xue, Z. D .Yin and B. B. Wu, “Technology Research of Novel Energy Storage Control for the PV Generation System,” Proceedings of APPEEC 2009, Asia-Pacific, Wuhan, 27-31 March 2009, pp.1-4.
[3] Z. Q. Wang, X. Li and G. Y. Li, “Energy Storage Control for the Photovoltaic Generation System in a Micro-Grid,” Proceedings of the 5th International Conference, Beijing, 20-22 September 2010, pp.1-5.
[4] S. Armstrong, M. E. Glavin and W. G. Hurley, “Comparison of Battery Charging Algorithms for stand Alone Photovoltaic Systems,” Proceedings of Power Electronics Specialists Conference of PESC 2008 IEEE, Rhodes, 15-19 June 2008, pp. 1469-1475.
[5] E. Koutroulis and K. Kalaitzakis, “Novel Battery Charging Regulation System for Photovoltaic Applications,” IEE Proceedings Electric Power Applications, Vol. 151, No. 2, 2004, pp. 191-197. doi:10.1049/ip-epa:20040219
[6] W. K. Zhang, “Fast Charging Method for Lead-Acid Batteries in Automobile,” Hunan Institute of Science and Technology, Vol. 18, No. 3, 2005, pp. 70-72.
[7] H. Fakham, D. Lu and B. Francois, “Power Control Design of a Battery Charger in a Hybrid Active PV Generator for Load-Following Applications,” IEEE Transaction on Industrial Electronics, Vol. 58, No. 1, 2011, pp. 85-94.
[8] T. D. Herder. “Design and Simulation of Photovoltaic Super System Using Simulink,” Senior Project, Electrical Engineering Department, California Polytechnic State University, San Luis Obispo, 2006.
[9] R. Perez, “Lead-acid Battery State of Charge vs. Voltage,” Home Power, Vol. 36, 1993, p. 67.
[10] J. Chen, “Research on House-Hold Photovoltaic Power Generation System Based on Bi-Directional DC/DC Converter,” Power Electronics and Drives Transmission, Jiangnan University, Wuxi, 2009.
[11] J. Xu, “Design and Development of Power Battery Charger,” Control Theory and Control Engineering, Tianjing University, Tianjing, 2008.
[12] X. Q. Wang and D. Zhang, “Carrier-Reversed Current Tracking PWM Control,” Science and Technology of West China, Vol. 8, No. 12, 2009, pp. 5-7.
[13] L. Xu and Y. X. Xie, “Summarization of Methods to Realize PWM Technology,” Power Supply Technologies and Applications, Vol. 8, No. 2, 2005, pp. 51-53.
[14] A. C. Hua and B. Z. Wei, “Charge and Discharge Characteristics of Lead-Acid Battery and LiFePO4 Battery,” Proceedings of International power Electronics Conference, Sapporo, 21-24 June 2010, p. 1481.
[15] W. T. Xie, “Research and Design of Novel PV-Array Simulator,” Power Electronics and Drives Transmission, Zhejiang University, Hangzhou, 2007.

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