Portions of Mindanao grid normalized after Easter blackout
MANILA, Philippines – Portions of the Mindanao grid are now totally normalized after a grid-wide power interruption occurred last Easter Sunday, April 5, the National Grid Corporation of the Philippines (NGCP) said.
The power grid operator said it implemented isolating operations as part of its blackout restoration procedures in the Mindanao grid, 3 minutes after the blackout started at 1:01 a.m.
NGCP immediately implemented blackout restoration procedures at 1:04 a.m. by going on "islanding operation," or the isolated operation of certain portions of the grid when there is a grid disturbance.
“NGCP’s Area Control Centers (ACCs) in Mindanao immediately performed islanding operations, and restored power transmission services to their respective areas,” NGCP said.
NGCP clarified that the entire Mindanao grid was not completely without power for a continuous 8 hours. It said that its islanding operations restored stable supply of power to areas beginning 1:37 a.m., just a little over half an hour after the disturbance was monitored.
All NGCP transmission facilities were energized and restored at 7:52 a.m. – Rappler.com