INTEGRATION OF GRID SCALE BATTERY ENERGY STORAGE SYSTEMS AND APPLICATION SCENARIOS

Abstract

Integration of renewable energy sources (RESs) into the grid has profoundly gained a lot of attention in the energy domain, coupled with an ever-changing generation profile and dependency on weather conditions, RESs are commonly known to pose security of supply challenges and in case they are not monitored they can cause techno-economic losses and even lead to catastrophic failure of the electrical grids. However, their availability and negligible generation cost make them environmentally friendly when compared to conventional energy sources. For seamless connection of renewables to the grid network, battery energy storage system (BESS) has been suggested in literature, the technology has come to the fore recently, and has found application cases in the utility grid with enhanced functions to participate in both reserve and wholesale electricity markets such as day-ahead and intra-day markets. This technical brief presents various energy storage systems (ESSs) potentially used in large-scale grid networks, which are investigated, and their individual properties are compared, where necessary application areas with examples enabled by constituting material properties are outlined, in the same context their general advantages and disadvantages are given in reference to the specific application cases. In addition, the application of large-scale BESS is explained together with the integration solutions such as use of Virtual Power Plant (VPP) and microgrid.