Analysis of Battery Energy Storage System Integration in a Combined Cycle Power Plant

Grid power systems constantly seek innovative ways to improve their efficiency and flexibility with an ever-evolving mix, and more volatile markets. Energy storage systems could bring about these outcomes, as shown in multiple studies over the last decade. More recently, combining a thermal asset, herein a combined cycle power plant, and the Battery Energy Storage System creates the concept of so-called “PI-BESS”. The expected benefits of hardware and software integration for the grid are the enhanced flexibility and robustness. Moreover, the integration brings new opportunities and optimization for the owner of the thermal hybrid plant. Capable of using the best of the two assets, it optimizes timely power delivery to the grid, allows energy arbitrage depending upon market services requirement, or starts the powerplant without external help in case of grid failure. This paper particularly focuses on those outcomes and the design of the storage system.