Journal of Power Electronics

The Korean Institute of Power Electronics (전력전자학회)
권호 표지

A Novel Grid-Connected PV PCS with New High Efficiency Converter

  • Published : 2008.10.20
Download PDF
⟨ Previous Next ⟩

Abstract

In this paper, new topology is proposed that can dramatically reduce the converter power rating and increase the efficiency of total PV system. Since the output voltage of PV module has very wide voltage range, in general, the DC/DC converter is used to get constant high DC voltage. According to analysis of PV characteristics, in proposed topology, only 20% power of total PV system power is needed for DC/DC converter. DC/DC converter used in proposed topology has flat efficiency curve at all load range and very high efficiency characteristics. The total system efficiency is the product of that of converter and that of inverter. In proposed topology, because the converter efficiency curve is flat all load range, the total system efficiency at the low power range is dramatically improved. The proposed topology is implemented for 200kW PCS system. This system has only three DC/DC converters with 20kW power rating each other. It is only one-third of total system power. The experiment results show that the proposed topology has good performance.

Keywords

References

  1. Kasemsan Siri, Vahe A. Caliskan, C. Q. Lee, "Maximum Power Tracking in Parallel Connected Converters", IEEE Transaction on Aerospace and Electronic systems, Vol. 29, No. 3, July 1993
  2. Mummadi Veerachary, Tomonobu Senjyu, Katsumi uezato, "Voltage-Based Maximum Power Point Tracking Control of PV System", IEEE Transations of Aerospace and Electronic Systems, Vol. 38, No. 1, January 2002
  3. Guo-Kiang Hung, Chih-Chang Chang, Chern-Lin Chen, "Automatic Phase-Shift Method for Islanding Detection of Grid-Connected Photovoltaic Inverters", IEEE Transactions on Energy Conversion, Vol. 18, No. 1, March 2003
  4. S. Alepuz, S. Busquets-Monge, J. Bordonau, J. Gago, D. Gonzalez, J. Balcells, "Interfacing Renewable Energy Sources to the Utility Grid Using a Three-Level Inverter", IEEE Trans. on Industrial Electronics, Vol. 53, No. 5, pp. 1504-1511, Oct. 2006 https://doi.org/10.1109/TIE.2006.882021
  5. H. Koizumi, T. Mizuno, T. Kaito, Y. Noda, N. Goshima, M. Kawasaki, K. Nagasaka, K. Kurokawa, "A Novel Microcontroller for Grid-Connected Photovoltaic Systems", IEEE Trans. on Industrial Electronics, Vol. 53, No. 6, pp. 1889-1897, Dec. 2006 https://doi.org/10.1109/TIE.2006.885526
  6. Amir Ostadi, Xing Gao, Gerry Moschopoulos, "Circuit Properties of Zero-Voltage-Transition PWM Converters", Journal of Power Electronics, Vol. 8, No. 1, pp. 35-50, Jan. 2008
  7. Bhim Singh, Ganesh Dutt Chaturvedi, "Analysis, Design, Modeling, Simulation and Development of Single-Switch AC-DC Converters for Power Factor and Efficiency Improvement", Journal of Power Electronics, Vol. 8, No. 1, pp. 51-59, January 2008
  8. Sirukarumbur Panduranfgan Natarajan, Thangavel Saroja Anandhi, "Control of Input Series Output Parallel Connected DC-DC Converters", Journal of Power Electronics, Vol. 7, No. 3, pp. 265-270, July 2007
  9. Kyung-soo Lee, Kenichiro Yamaguchi, Kosuke Kurokawa, "Proposed Distribution Voltage Control Method for Connected Cluster PV Systems", Journal of Power Electronics, Vol. 7, No. 4, pp. 286-293, Oct. 2007
  10. Weidong Xiao, Ozog, N., Dunford, W.G., "Topology Study of Photovoltaic Interface for Maximum Power Point Tracking", IEEE Transactions on Industrial Electronics, Vol. 54, No. 3, pp. 1696-1704, June 2007 https://doi.org/10.1109/TIE.2007.894732