Yellow alert for Visayas grid for 3rd straight day

CEBU CITY, Philippines — The National Grid Corporation of the Philippines (NGCP) placed the Visayas grid under a yellow alert from 4 p.m. to 9 p.m. on Wednesday, July 8, as a string of power plant outages narrowed the system’s safety margin during peak evening demand.

Available capacity stood at 2,641 megawatts (MW) against a projected peak demand of 2,510 MW, leaving a thin operating margin insufficient to cover the grid’s contingency requirement, NGCP said in an advisory issued at 1:30 p.m.

Aside from forced outages of power plants and demand that exceeded earlier projections, the Palm Concepcion Power Corporation (PCPC) in Iloilo declared a derated output of 70 MW due to a possible boiler tube leak.

READ: After 5 days of stability, Visayas power grid faces yellow alert anew

In turn, a total of 879.7 MW of capacity was unavailable to the grid, spread across dozens of affected units.

NGCP reported 8 plants on forced outage in July, 4 since June, 7 since May, 1 since March, 3 since 2025, 3 since 2024, 2 since 2023, and 1 unit down since 2021.

Another 14 plants were running at derated, or reduced, capacities.

A yellow alert does not mean an imminent power interruption.

But it signals that the grid’s buffer against unexpected shortfalls, such as a sudden plant trip or unforeseen spike in demand, has narrowed significantly.

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