Experience of Battery Energy Storage System by TATA Power DDL

The electric grid is a complex machine that is constantly being balanced to account for varying consumer demand and generation supply. An inability to balance these leads to grid instability, brown-outs or even black-outs in extreme situations. These situations happens on account of increase in variability of both supply and demand. With increase in Renewable energy and expected rise in Penetration of EVs which are unpredictable and intermittent in nature can be accommodated easily at low penetration levels but greater Penetration makes increasingly it difficult to maintain grid stability. TATA Power DDL has two Battery energy storage system (BESS) one is Grid integrated 10 MWh system and 150 kWh Community Energy storage System. In this paper we would like to share the TATA Power DDL experience of Battery Energy storage system usage from Distribution Utility perspective where the System has been used extensively for Deviation Settlement Mechanism (DSM/ADSM), Sustained Deviation violation management, Reactive Power Management, Peak Load management, Frequency regulation, Capex deferral and Emergency services by developing various Automated logics to run the system with best of the business potential perspective. In addition to this the paper would describe about potential Battery Energy storage system required for TATA Power DDL to overcome Penalties on account of deviations with respect to various regulations and Power for Emergency services. Initiatives like Pole mounted battery Energy storage system (Zero Foot Print solution) under development to cater the needs of consumers in densely populated areas with space constraints for maintaining voltage regulation within specified limit.