September 6, 2016
OVER 1,000 megawatts
(MW) of power-generating capacity was shaved off from the Luzon grid as a
result of a transmission-line tripping incident, the National Grid Corp. of the
Philippines (NGCP) said on Tuesday. The grid operator’s Batangas-Makban
230-kV (kiloVolt) Line 1 tripped at 12:46 p.m., causing the isolation of
power plants with a combined capacity of 1,030 MW.
The loss of power
prompted NGCP to put the Luzon grid on red alert from 2 p.m.
Restoration is ongoing,
but 100 MW of power were already restored as of 2:11 p.m.
Line personnel were
already on line patrol to investigate the root cause of the incident, NGCP
said.
The
Manila Electric Co. (Meralco), which serves over 5 million customers in its
franchise area, including Metro Manila, said it had to implement a manual load dropping
(MLD) schedule starting at around 1 p.m.
It said the tripping of
a transmission line resulted in power deficiency in the Meralco franchise area
as supply from three power plants serving Luzon grid was affected. These are
San Lorenzo 1 and 2, Avion and San Gabriel. These are all gas plants of the
Lopez-led First Gen Corp.
The utility firm said
the MLD schedule would last until 5 p.m. on Tuesday.
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