Commissioning and testing of the first Lithium-Titanate BESS for the Italian transmission grid

Battery Energy Storage Systems (BESSs) represent an useful tool for grid support and integration of renewable energy sources. Amongst the different technologies, Lithium-Titanate batteries represent one of the most promising solutions, due to their very long expected lifetime. The paper deals with the commissioning and testing of Terna's Lithium-Titanate, 1MWh, BESS in Codrongianos substation, both in grid-connected and islanded operation. Test results show that round trip efficiency and power accuracy target values are met and that the BESS can effectively be used for black-starting a MV grid.