CAGAYAN DE ORO, Philippines – The National Grid Corporation of the Philippines (NGCP) raised the alert level for a few hours in Mindanao on Wednesday, April 24, as nine power plants went on a forced outage while five others ran on derated capacities. The Mindanao power grid was placed by the NGCP under “yellow alert” from 10 am until 3:09 pm, a situation when “the operating margin is insufficient to meet the transmission grid’s contingency requi…