NGCP implements rotational brownouts in parts of Luzon on Wednesday, April 24

The National Grid Corp. of the Philippines (NGCP) is set to implement rotational brownouts in some areas of Luzon amid the yellow and red alerts raised due to depleting reserves.

In an advisory, NGCP said it may implement manual load dropping (MLD) in the following areas from 2 p.m. to 3 p.m. to "maintain the integrity of the power system":

• Ilocos Sur Electric Cooperative (parts of Ilocos Sur)
• Isabela Electric Cooperative II (parts of Isabela)
• San Fernando Electric Light and Power Co. (City of San Fernando, Pampanga)
• Pampanga Rural Electric Cooperative and Pampanga Electric Cooperative I (parts of Pampanga)
• Cabanatuan Electric Corp. (Cabanatuan City)
• Batangas Electric Cooperative II, First Bay Power Corp., Ibaan Electric (parts of Batangas)
• Camarines Sur Electric Cooperative II (parts of Camarines Sur)
• Manila Electric Co. (parts of Metro Manila)

An MLD is defined as the process of cutting off power in areas served at a specific time due to power supply shortage.

Red and yellow alert statuses were raised over the Luzon grid due to the outages of several power plants:

• GN Power Mariveles Coal Power Plant Unit I (345 MW)
• GMPC Unit II (345 MW)
• SMC Consolidated Power Corp. Limay Coal Unit I (150 MW)
•  SCPC Limay Coal Unit II (150 MW)

"Schedule may be cancelled if system condition improves, such as if actual demand falls below projections," the NGCP said.

"NGCP encourages everyone to exercise prudence in using electricity," it said. —Ted Cordero/KBK, GMA News