Simulation of a last-minute flexibility market for renewable power schedule deviations in Northern Germany

A high share of fluctuating renewable energies in the power system leads to considerable schedule deviations in power generation that are sometimes difficult to predict due to their dependence on weather conditions. This paper presents a flexibility based last-minute intraday market focused on trading within the last 15 minutes before power delivery. The balancing effects of such a fast-trading market are investigated for the scenario years 2025, 2030 and 2035 using a co-simulation approach. As flexibility options combined heat and power plants, batteries and electrolysers are modeled based on two regulatory scenarios (flexibility and base). The results show how such a market can contribute to the reduction of short-term schedule deviations, how seasonal effects influence prices and the distribution of flexibility activation related to the different flexibility providers.