Model-based economic assessment of stationary battery systems providing primary control reserve

摘要

Battery aging has been included through an S-N curve approach and a simplified cycle count algorithm. This allowed analyzing the changing performance of the BESS over time of operation on the PCR market. Due to the very shallow DoD cycles, the simple approach, which ignores the influence of current rates and temperature, cannot reveal the difference for the 1:2 and 1:1 dimensioned systems. Therefore, a next step will be the implementation of a more detailed model in the BESS operation simulation module. This will be essential for more accurate statements regarding system dimensioning and cost-effectiveness. However, the simulation has first proven that both systems can deliver the expected power output under the given framework at all times over their lifetime. Even the 1:1 dimensioned system can deliver the expected power output at all times during the payback period. However, during operation, it reaches critical high and low SoCs, which are currently not tolerated by the responsible TSOs.