MANILA, Philippines — Grid operator National Grid Corp. of the Philippines (NGCP) is placing Luzon and Visayas grids under yellow alert Wednesday as more than 30 power plants are offline or are operating at reduced capacity. In an advisory, NGCP said the yellow alert will be up in both Luzon and Visayas today, April 17, from 1 p.m. to 11 p.m. A yellow alert is raised when the operating margin is insufficient to meet the transmission grid’s contingency requirement. It does not necessarily lead to a power outage. NGCP said 18 power plants in Luzon are on forced outage while […]...Keep on reading: Luzon, Visayas grids on yellow alert