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Community Energy Storage (CES) has been known as a new generation of energy storage that is a crucial element in smart grid. Its location at the edge of the grid and close to customers offers great benefits compare to energy storage located at substation in terms of smoothening the impacts of intermittent Renewable Energy (RE) resources and diversity of Electric Vehicle (EV) operational characteristics. Power utilities found that CES deployment along with reliable planning and control system can become a smart solution in providing sustainable energy and open new business opportunity. However, despite the benefits, CES deployment in distribution system with the integration of PV and EV may face several challenges. This paper provides an overview of CES, covering technology, prospect, challenges and opportunity in obtaining a reliable smart distribution system with optimal cost. In addition, preliminary simulation works are presented to show the effectiveness of CES in reducing power loss and improve voltage profile compare to a central battery located at substation.

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The recent proliferation of residential solar photovoltaic systems has prompted several technical challenges to the operation of low voltage (LV) distribution networks. More specifically, the mismatch of the solar generation and demand profiles, particularly during the midday when the demand is low and solar generation is high, can lead to network overvoltages and increased network losses. In addition, the solar photovoltaic system is not able to reduce the system’s maximum demand, given the residential LV network would normally have an evening peak when the sun goes down. In this regard, this paper examines two different control strategies in designing the battery energy storage system. One aims to eliminate reverse flow caused by the surplus solar energy and the other aims for peak demand reduction.

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