Benefits of an Efficient Cross-Zonal Reassessment of Available Intraday Capacities

This paper describes a novel approach to assess available transmission capacities for European intraday electricity market, with the aim to increase the efficiency of the utilization of the high-voltage transmission grid. The methodology is considering the latest available information and optimizes the available intraday cross-zonal capacity by ensuring grid security at the same time. Based on the methodology, a prototype software solution (intraday capacity INC/DEC process) has been developed, tested, and put into the operation by APG. The results from 2023 show that taking into account the latest information after the day-ahead market coupling at most Austrian bidding zone borders of the Core capacity calculation region results in increased but also reduced intraday capacity about 45% of the time. Furthermore, an approach to quantify the benefit of increased cross-zonal capacity on an example business day is presented.