Power supply issues continue to plague Luzon and the Visayas as the National Grid Corporation of the Philippines (NGCP) extends the red alert status in Luzon and the yellow alert in the Visayas.

According to an advisory from NGCP, the red alert status in the Luzon grid has been extended up to 11 p.m. on Tuesday due to two more power plants going on unscheduled shutdown. This resulted in manual load dropping or rotational power interruptions affecting parts of northern Luzon starting at 4:15 p.m.

Meanwhile, the yellow alert status in the Visayas has also been extended up to 9 p.m. due to generation deficiency.

A red alert status indicates that the power supply is insufficient to meet consumer demand and the transmission grid’s regulating requirement. On the other hand, a yellow alert is issued when the operating margin is insufficient to meet the transmission grid’s contingency requirement, but does not necessarily result in a power outage.

In Luzon, 19 power plants are on forced outage and three others are running on derated capacities, leading to a power supply shortage of 2,117.3 megawatts. In the Visayas, 12 power plants are on unscheduled shutdown and five others are operating on derated capacities, resulting in 676.5 MW of electricity being unavailable to the grid.

NGCP reported that the peak demand in Luzon is 13,024 MW while the available capacity is 13,537 MW. In the Visayas, the peak demand is 2,440 MW compared to the available capacity of 2,742 MW.


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