Coordinated disturbances haunt grids worldwide. Here’s how researchers solved the mystery.
For years, mysterious electrical anomalies have been flummoxing grid managers around the world. Every 60 seconds, the frequency on the grid would drop a tiny bit. Even weirder: The sags happened at the exact same time on power grids across countries and continents. It was a mystery that Dirk Witthaut, a researcher at Forschungszentrum Jülich…