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Power management analysis for V2G (Vehicle-to-Grid) applications in a microgrid with photovoltaic source

Zeel Antrixkumar Padhya, Shabbir Saleh Bohra


The impact of the irregularity of the in-feed electricity on the power supply networks must be met with new concepts and technologies, such as peak shaving and reactive power management, etc. These actions facilitate also limiting carbon emission and associated footprints. This study aimed to investigate how a microgrid can support further enlargement of renewable energy source (RES) based plants as a collaborating unit in the power supply network. The microgrid consists of conventional and/or renewable energy sources, like solar energy, wind energy, bio-gas based, etc. Among these, the PV system is one of the most appreciated RESs being abundant and inexhaustible. In this study, analysis for grid-connected PV systems has been carried out to reveal the effects of electric vehicle (EV), which represents a mobile battery energy storage system (BESS). The EV could be treated as the best energy storage device under a scenario where a large number of EVs are deployed. The additional storage could not be required as the electric vehicles’ batteries themselves act as a reasonable source of energy. The fleet of EVs will ensure minimum stress on the power grid under the vehicle-to-grid (V2G) concept. The EV batteries can be charged either from the utility grid during the off-peak period or through solar PV during day-time; and during peak load hours, the same batteries can be allowed to discharge into the grid to meet peak demands. Hence, the stability of the grid can be improved by implementing the V2G concept. The simulation results show the nature of power flow in the microgrid for various operating modes implemented on the MATLAB®/Simulink platform. This study helps in planning and power management of solar PV dominating microgrid catering fleet of EVs.

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