Curative System Operation in the 110 kV Distribution Grid

The energy transition poses significant challenges for the electrical distribution grid. This paper examines curative system operation in the 110 kV distribution grid that aims to tackle some of these challenges. Unlike preventive system operation, which avoids potential violations of operating thresholds during normal operation before they occur, curative system operation aims to maintain the grid within permissible thresholds only after a critical event through prepared, targeted measures. This paper analyses the complex requirements and challenges in implementing curative measures, particularly in comparison to existing approaches and concerning the high node density and the multitude of possible measures involving renewable generation plants and other customer facilities in the high-voltage distribution grid. By defining relevant thresholds and considering influencing factors, a unified understanding of curative system operation in the distribution grid is established. The paper demonstrates how curative system operation approaches can contribute to ensuring system security and describes the advantages of their utilization. Finally, perspectives for future research in the area of curative system operation in the 110 kV distribution grid are outlined.