The Visayas grid will again be placed under yellow alert on Tuesday, June 2, due to the continued forced outages of several major coal-fired power plants in the region and high power demand forecasts, according to the National Grid Corporation of the Philippines (NGCP).
In an advisory, the NGCP said the six-hour yellow alert, from 3 p.m. to 9 p.m., was declared because the available power supply in the Visayas remained insufficient to maintain the required operating margin.
The grid recorded a peak demand of 2,542 megawatts (MW), while available capacity stood at only 2,412 MW.
The NGCP reported that a total of 996.4 MW remained unavailable to the grid due to multiple plant outages. Ten power plants were on forced outage in June 2026, while nine plants have remained on forced outage since May 2026. One plant has been offline since March 2026, three since 2025, two since 2024, two since 2023, and one plant has been unavailable since 2021.
In addition, 11 power plants are currently operating at derated capacities.
Among the major contributing factors to the yellow alert declaration were the unavailability of large coal plants in the Visayas, specifically TVI 1, TVI 2, PEDC 3, and KSPC 2, as well as the forecasted high system demand.
"A yellow alert is issued when the operating margin is insufficient to meet the transmission grid’s contingency requirement," it read.
