Synchronized UPS and Battery Checks Behind Mysterious Grid Frequency Dips
Power grid operators across Europe, Australia, the United States and Malaysia have spent years puzzling over a rhythmic anomaly: ultra-low-frequency oscillations that cause grid frequency to dip slightly every 60 seconds, simultaneously across networks on different continents. Now, researchers have identified the culprit — uninterruptible power supplies (UPS) and stationary batteries that verify their charge … Read more