An Overview of CESC’s 315 kWh Grid Connected Battery Energy Storage System

The conventional unidirectional power flow has become bidirectional with the emergence of Distributed Energy Sources (DERs) & prosumers in the electricity distribution system. The electricity landscape is undergoing transformations that are more complex than ever before for emerging technologies, new creative business models, and altering regulatory environments. The power system’s electricity supply and demand must be balanced, and real-time energy production across the grid should match the dynamic demands. The development of economical battery energy storage systems (BESS) will be a key aspect of this balancing process. This paper summarizes an overview of stationary BESS applications and technologies. It presents a review on the application like load levelling beyond a pre-set level, aiding deferrals of CAPEX for meeting localized load growth, voltage and frequency regulations & cost analysis of 315 kWh (Maximum power rating: 125 kVA) grid connected Battery Energy Storage System (BESS) commissioned at CESC’s low voltage distribution level, in a joint effort with Exide Industries Limited. It concludes by providing information on various adoption drivers and future prospects in the power distribution system.