A Sensitivity Analysis of Deployment Time and Reserve Cost of Electrolysers and BESS for using Frequency Stability Constrained Economic Dispatch

The loss of large power infeeds can lead to significant frequency variations in the power grid, posing a blackout risk and compromising power system resilience. Traditionally, frequency reserve services were provided by generation units. However, the integration of new elements such as battery energy storage systems (BESS) and electrolysers prompts an exploration of their potential benefits in mitigating power imbalances. In this study, a Mixed Integer Second Order Cone economic dispatch model is employed to identify the optimal procurement of frequency reserve from generators, BESS, and electrolysers. A sensitivity analysis of the cost of the procured reserved and deployment time of electrolysers was also carried out. Results indicate that these parameters significantly influence the operational set points, modifying the dimensioning event and the optimal procurement of frequency reserve when it comes to ensuring operational resilience in terms of maximum frequency deviation.