The provided text outlines the challenges and necessary transformations for electricity transmission system operators (TSOs) like Energinet to maintain grid stability amidst increasing renewable energy integration. It highlights vulnerabilities exposed by past incidents, such as widespread blackouts and IT system failures, emphasising the need for improved real-time visibility and control options. The document then proposes innovative solutions including deploying high-speed Phasor Measurement Units (PMUs), leveraging advanced data analytics and AI for anomaly detection, and developing sophisticated decision support tools for operators. Furthermore, it stresses the importance of automated protection schemes, enhanced operator training through simulation, and strengthened collaboration among TSOs and with distribution operators to ensure grid resilience and reliability in the future.