Author(s): Takahisa Kawagoe*, Kiyotaka Fuji, Atsushi Shiota, Yasunori Mitani, Yaser Soliman Qudaih
Department of Electrical and Electronic Engineering, Kyushu Institute of Technology, Kitakyushu 804-8550, Japan
International Journal of Smart Grid and Clean Energy, vol. 3, no. 4, October 2014: pp. 425-430
ISSN: 2315-4462 (Print)
ISSN: 2373-3594 (Online)
Digital Object Identifier: 10.12720/sgce.3.4.425-430

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Abstract: This research aims to propose a power supply system in which conventional photovoltaic (PV) system attains advanced functions. First, each household can use the power independently from the power system and load in the power system is reduced in the event of power shortage. Second, stable power is obtained from PV in which the output fluctuates due to the change in the amount of solar radiation. Third, PV output suppression is avoided when voltage of the distribution line is increased by the reverse power flow. Fourth, stable power is supplied to each household and refuge in the event of disaster. To achieve these, grid-connected and self-sustaining power supply system is developed by connecting a DC/DC converter between electric vehicle (EV) battery and conventional power conditioning subsystem (PCS) of PV system. In this paper, the power supply system model is presented. Also, the bidirectional DC/DC converter circuit is described in consideration of PV system installed in Kyushu Institute of Technology and of major EV in Japan. Finally, the hardware configuration of the proposed system is shown. It is considered that the effectiveness can be evaluated by constructing the proposed system.

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Keywords: Bidirectional DC/DC converter, EV, PCS, PV

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