Development of 1 mwh battery based energy storage system for renewable integration

Battery based Energy Storage Systems (BESS) are becoming more popular in view of advancement in battery technologies together with reduction in price and penetration of renewable energy into the grid. BHEL has developed 1 MWh BESS for renewable integration for ramp rate control and capacity firming. As this pilot project also aims at evaluating very promising batteries, 1 MWh BESS has been realized using 500 kWh Li Ion battery, 300 kWh advanced Lead Acid battery and 200 kWh Flow battery. The developed BESS has been integrated with 500 kWp SPV plant and have been successfully operating in ramp rate control and capacity firming applications. The performance of the three batteries are also evaluated. System level design, development of Energy Management System (EMS), IGBT based Power Conditioning System (PCS) and communication between various sub-systems were developed by BHEL with in-house efforts.