Luzon and Visayas grids on yellow alert on May 20

MANILA, Philippines — National Grid Corporation of the Philippines (NGCP) has placed Luzon and Visayas grids under yellow alert on Monday as more than 30 power plants are unavailable. According to NGCP, a yellow alert is issued “when the operating margin is insufficient to meet the transmission grid’s contingency requirement.” READ: Luzon, Visayas grids under
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