July 26, 2016
from Business Mirror
The Luzon grid was placed on “yellow alert” by National Grid Corp. of the Philippines (NGCP) on Tuesday due to lower- level contingency reserves brought about by insufficient power supply.
The yellow alert took effect from 12 noon to 3 p.m. Before the yellow alert was issued, NGCP said available capacity was expected at 9723 megawatts (MW), while peak demand was expected to hit 9125 MW. As such, power reserves were placed at 589 MW.
A yellow alert is issued by the grid operator when contingency reserve is less than the capacity of the largest synchronized unit of the grid. In Luzon this is equivalent to 647 MW, or one unit of the Sual power plant.
The Manila Electric Co. (Meralco) separately said the issuance of the yellow alert was mainly due to the sudden outage of Calaca 2, aggravated by the limited output of Ilijan B and GN Power 2.
The utility firm said it has advised participants of its Interruptible Load Program (ILP) to be ready to use their own generator sets should the need arise.
“As of 1:30 p.m., we had 114 ILP participants that committed to deload, if needed, equivalent to a deloading capacity of around 242 MW,” Meralco Head of Utility Economics Lawrence Fernandez said.