Synchronized System Tests Linked to Power-Grid Frequency Dips

Research involving Forschungszentrum Jülich and grid operator TenneT linked recurring power-grid frequency dips to synchronized self-tests by battery systems and data-center uninterruptible power supply (UPS) devices. Some dips exceeded 20 millihertz, but the findings described no immediate threat to grid stability. The dips could move grids closer to operating limits.

Texas has separate data-center permitting actions. Abbott’s Sept. 21 directive told the Texas Commission on Environmental Quality to suspend data-center permits pending an ERCOT audit. His directive also ordered grid and water reviews.

Gov.-elect Gina Hinojosa campaigned on a moratorium on new data-center approvals. Her campaign pledge to pause new approvals has not taken effect. Hinojosa is due to take office in January.