Visayas Grid Under Yellow Alert as Power Plant Outages Strip 857 MW
The National Grid Corporation of the Philippines (NGCP) has officially placed the Visayas power grid under yellow alert status due to a severe contraction in power reserves. Unplanned forced outages and reduced output across multiple power plants stripped a combined 857.2 MW of electricity from the regional grid. Operating margins have dropped to precarious levels, prompting warnings of potential rotational brownouts.
The grid operator scheduled the yellow alert to take effect from 5:00 PM to 9:00 PM. This timeframe coincides directly with the region's evening peak demand hours, when electricity usage routinely spikes as households and commercial establishments simultaneously activate major appliances.
Critical Supply Deficit
Data released by the NGCP reveals a slim operating buffer during the alert window:
Available Generating Capacity: 2,580 MW
Projected Peak Demand: 2,423 MW
Net Operating Margin: 157 MW
A yellow alert indicates that the grid's operating margin is completely insufficient to meet its standard contingency requirements. If any additional generation units fail while reserves are this thin, the system will rapidly escalate to a red alert. This escalation triggers mandatory manual load dropping—commonly known as rolling brownouts—to protect the integrity of the bulk transmission network from a total system collapse.
Outages Compound Long-Term Strain
The ongoing generation crisis stems from a combination of sudden technical failures and chronic generation deficits. According to the NGCP, the immediate trigger for the yellow alert includes the major forced outages of three dominant regional power units:
Therma Visayas Inc. (TVI) Unit 1 (169 MW)
Therma Visayas Inc. (TVI) Unit 2 (169 MW)
Panay Energy Development Corporation (PEDC) Unit 3 (150 MW)
The current grid pressure is severely compounded by unaddressed long-term outages. A total of 20 power plants remain completely offline across the Visayas grid network. This includes 11 facilities that went down in March 2026, four offline since 2025, two since 2024, two since 2023, and one generation plant that has remained entirely unavailable since 2021. An additional 12 power plants are running on derated capacities, further depressing the grid's potential output.
Mitigation and Conservation
Energy authorities are monitoring the situation to determine if power transfers from neighboring regions can help bridge the current deficit. However, the grid's stability heavily relies on demand-side management during high-load hours.
The Department of Energy (DOE) and the NGCP are strongly urging industrial facilities, commercial establishments, and the general public to practice strict energy conservation measures. Consumers are advised to defer the use of heavy cooling systems and non-essential appliances throughout the designated evening peak hours to help keep the grid operational and prevent widespread power disruptions.
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