Spain’s Grid Warns Power Supply at Risk After Voltage Swings

Spain’s grid operator warned that a resurgence in sharp voltage swings threatens to disrupt the country’s power supply less than six months after it suffered the most severe outage in Europe in decades.

Red Electrica requested urgent changes to its operating procedures to better manage voltage in its system, according to a document published by the regulator. The company said the challenges are being caused by abrupt changes in scheduled production, particularly from renewable power plants.