NGCP places Luzon grid on ‘yellow alert’ for second consecutive day on Wednesday

by Lenie LecturaJuly 27, 2016

from Business Mirror

For the second consecutive day, the Luzon grid was placed on yellow alert on Wednesday as some power plants continued to encounter technical glitches.

“Yellow alert was raised from 9 a.m. to 4 p.m.,” Meralco Head of Utility Economics Lawrence Fernandez said.

A yellow alert is issued by the National Grid Corp. of the Philippines (NGCP), when contingency reserve is less than the capacity of the largest synchronized unit of the grid. In Luzon this is equivalent to 647megawatts (MW), or a single unit of the Sual power plant’s generating capacity.

“Calaca 2 is still out, while Sual 2 was derated from 647 MW to 250 MW,” Fernandez said.

Pagbilao 2, which had been on maintenance outage since May 17, tried to resume operations on Tueday night. However, it encountered trouble while trying to come back online and is still out right now,” Fernandez said.

NGCP’s power outlook as of Wednesday morning showed that Luzon’s projected capacity stood at 9,495 MW, while demand was at 9,043 MW. This meant that reserves fell to 452 MW.

On Tuesday NGCP issued a yellow alert due to lower-level contingency reserves brought about by insufficient power supply.

Fernandez had said Tuesday’s 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 to be ready to use their own generator sets should the need arise.