The National Grid Corporation of the Philippines (NGCP) announced that electricity services in Eastern Visayas have been fully restored following the magnitude 6.9 earthquake that struck Bogo City, Cebu, on Tuesday night.
In its 10:00 p.m. advisory on Wednesday, NGCP said that the Leyte-Samar sub-grid was completely restored at 7:12 p.m., ensuring normal power supply in the region despite several transmission lines in other parts of the Visayas still being down.
The quake forced four power plants to shut down, leaving 348.2 megawatts of supply unavailable.
On the transmission side, the Tabango-Kananga 230kV Line 1 was restored at 9:18 p.m. Still, other major lines remain out of service, including the Daanbantayan-Tabango and Daanbantayan-Compostela 230kV Lines, as well as the Leyte-Luzon 350kV High Voltage Direct Current (HVDC) Line.
Earlier, NGCP placed the Visayas grid on yellow alert after reserves fell below the required level. This was lifted at 9 p.m. after available capacity reached 2,239 megawatts against a peak demand of 1,950 megawatts.
A yellow alert is issued when the operating margin is insufficient to meet the transmission grid’s contingency requirement.
NGCP assured the public that transmission services in the Visayas grid are now operating normally, and that restoration work on the remaining affected facilities continues.