Functional PCS power supply system with EV battery storage for stable PV power delivery

Author(s): Kiyotaka Fujia,b*, Yoshihito Shiraia, Takahisa Kawagoeb, Atsushi Shiotab, Yasunori Mitanib, Yaser Soliman Qudaihb
aDepartment of Biological Functions and Engineering Graduate School of Life Science and Systems Engineering, Kyushu Institute of Technology, Kitakyushu 808-0196, Japan
bDepartment of Electrical and Electronic Engineering, Kyushu Institute of Technology, Kitakyushu 804-8550, Japan
International Journal of Smart Grid and Clean Energy, vol. 4, no. 1, January 2015: pp. 45-51
ISSN: 2315-4462 (Print)
ISSN: 2373-3594 (Online)
Digital Object Identifier: 10.12720/sgce.4.1.45-51


Abstract: This research proposes a residential Photovoltaic-Power Conditioning Subsystem (PV-PCS) in a functional and stable power supply system with battery storage (Electric Vehicle [EV] storage etc.) to reduce PV output fluctuation. In PV power generation, PV power fluctuations caused by weather changes makes it difficult to obtain stable power output. Further, it can then be expected that this adversely affects the power system. In this paper, functional power supply system model is constructed with power fluctuation suppression control system using bidirectional DC/DC converter and existing residential PCS and EV battery storage. Furthermore, simulation results of the electric battery power suppression element of the PV power fluctuation are also shown by using Simple Moving Average (SMA) control method to suppress PV power fluctuation. PV power suppression system using existing residential PCS has an advantage that can not only suppress the energy change during normal operation but can also construct the isolated power supply in an emergency case of power supply loss. In this emergency case, EV battery storage control provides the power to critical loads during utility outage. This feature is not available without storage. Also, effectiveness of PV-PCS interconnection stable power supply system with existing residential PCS in Japan was proposed. Moreover, a basic research of solar power generation amount of solar radiation estimation and the resulting simulation on information acquisition method of solar energy capacity using Geographic Information System (GIS) are presented.

Keywords: Renewable energy, electric vehicles storage, photovoltaic power generation, power conditioning subsystem, PV power fluctuation suppression, geographic information system

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