SECTION 01 | ENERGY 24 09 DIE STADT ALS SPEICHER (CITY AS STORAGE) Virtual energy storage has been successfully demonstrated across two German cities, Herten and Wunsiedel. As part of a project, several small and medium-size prosumers and producers were bundled and participated in the energy markets. Both private and municipal plants formed part of the model, connecting households, electric vehicles and a public swimming pool, as great untapped storage capability lies in existing infrastructure. The virtual storage was adapted to market demand and participated in the spot market. This system could have a role to play in the rapidly changing energy supply sector with owners of CHP plants, heat pumps, night storage heating or PV-batteries motivated to promote clean energy systems. SECTION 01 GERMANY 25 10 ESTABLISHMENT OF PILOT PROJECT ON GRID SCALE BATTERY ENERGY STORAGE SYSTEMS (BESS) OF DIFFERENT TECHNOLOGIES Recognising the increasing importance of Battery Energy Storage Systems in India, POWERGRID has established a pioneering pilot project demonstrating two battery storage system technologies (Advanced Lead Acid & Lithium Iron Phosphate) with battery management at Puducherry. The systems, of 250 kWh and 500 kW in size, are installed in one location and connected with the same feeder to provide identical grid conditions. They can therefore be compared on various parameters like overall sizing, efficiency, auxiliary power consumption, operational difficulties and maintenance requirements. While the units are relatively small for large grid storage management, this could be advantageous in the future as grids become less centralised, as well as for off-grid locations. The inclusion of multiple storage technologies along with grid management software will provide valuable data to enable grid balancing and facilitate wider deployment of renewables. SMART GRIDS & ENERGY STORAGE INDIA