A methodology for dynamic procurement of secondary reserve capacity in power systems with significant vRES penetrations

This article reviewed methodologies currently used for allocating secondary balancing capacity in Europe and introduced a new dynamic methodology that considers anticipated future deviations for capacity allocation. It illustrated secondary capacity allocation in Spain for 2022 using historical data from 2019 to 2021. The open-access Multi-agent Trading of Renewable Production (RES.Trade) tool verified that traditional allocation resulted in usage rates of 22% for upward and 37% for downward allocated capacities. The dynamic allocation method, however, increased the utilization of upward and downward capacities by approximately 13% and 8%, respectively, and freed up 11% of resources when not required. Additionally, the study noted a reduction of three instances in extraordinary upward balancing events, along with a rise of 59 events for downward balancing needs.