Yellow Alert declared over Visayas grid as outages linger
The National Grid Corporation of the Philippines has declared a yellow alert for the Visayas grid due to insufficient power reserves. Multiple coal-fired power plants are currently offline or operating at reduced capacity, straining the region's energy supply.
Why it matters
Frequent grid alerts highlight critical infrastructure vulnerabilities and the urgent need for energy sector reform to prevent potential rotating outages.
Photo from the National Grid Corporation of the Philippines (NGCP)
CEBU CITY, Philippines — The National Grid Corp. of the Philippines (NGCP) placed the Visayas grid under a yellow alert once again on Thursday, August 6.
The yellow alert covers the peak hours between 4 p.m. and 8 p.m.
Available capacity stood at 2,478 megawatts (MW) against a peak demand of 2,291MW during the alert window, NGCP said in its 8 a.m. advisory.
Several of the Visayas’ largest coal-fired plants remain unavailable, five of which recently went offline due to emergency shutdowns and became isolated when the Daanbantayan transmission lines tripped.
A yellow alert is declared when the operating margin is not enough to cover the grid’s contingency requirement. This means a single unexpected plant trip or major disturbance could push the system toward supply shortages, though rotating outages are not yet necessary at that stage.
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