Sunday, June 19, 2022
Luzon grid placed under red alert causing power outages
The country’s grid operator, National Grid Corp. of the Philippines (NGCP), raised a red alert in Luzon on Saturday due to insufficient power supply, which briefly affected electricity services to over 1 million customers in Metro Manila and adjacent provinces, the Department of Energy (DOE) said.
NGCP lifted the red alert at 5:30 p.m., shifting to yellow alert, which lasted until 11 p.m. on Saturday.
Red alert is raised when the power supply is insufficient, which may lead to outages. On the other hand, a yellow alert means it may or may not lead to rotational brownouts.
Saturday’s red alert resulted in power interruptions in parts of the areas covered by Manila Electric Co. (Meralco) and other power distributors in Luzon.
Meralco reported an automatic load dropping (ALD) occurred at 1:53 p.m. on Saturday. ALD, as explained by the power distributor, means cutting off electricity at certain areas due to very low supply.
“This was due to the decrease of an approximate 1,200 MW (megawatts) in Meralco’s load affecting around 1.6 million customers in portions of Caloocan, Valenzuela, Malabon, Manila, Makati, Muntinlupa, Las Piñas and Navotas in Metro Manila; as well as parts of Bulacan, Rizal, Laguna, Batangas and Cavite,” it added.
Tripping of power plants
The brief power interruption, according to the DOE, was due to the tripping of Hermosa-Limay 230kV Lines 1 and 2, disconnecting two Bataan power plants from the Luzon grid.
The energy department instructed the NGCP to immediately resolve the transmission line issues, submit to them the list of affected customers that experienced power interruption and explain the details of the incident.
“The DOE has also initiated its coordination with the Energy Regulatory Commission in addressing this matter,” it added.
https://newsinfo.inquirer.net/1612692/luzon-grid-placed-under-red-alert
Parts of Luzon hit by power outage
Parts of Luzon experienced power outage yesterday after a transmission line tripped and isolated major power plants in Bataan.
The Department of Energy (DOE) said the National Grid Corp. of the Philippines (NGCP) raised the red and yellow alerts on the Luzon grid due to generation deficiency.
The red alert was implemented from 3 p.m. to 4 p.m. and from 7 p.m. to 10 p.m. The yellow alert was raised from 5 p.m. to 6 p.m. and 11 p.m.
A yellow alert means power reserves were not enough to cover the largest running generating unit at the time, but does not necessarily lead to power outages.
A red alert means there is severe power deficiency and can lead to rotational power interruptions.
The DOE said the red alert triggered the power interruption in the franchise areas of Manila Electric Co. (Meralco) and other distribution utilities in Luzon.
Meralco said an automatic load dropping occurred at 1:53 p.m. Power was restored at around 2:11 p.m.
“This was due to the decrease of approximately 1,200 megawatts in Meralco’s load, affecting around 1.6 million customers in portions of Caloocan, Valenzuela, Malabon, Manila, Makati, Muntinlupa and Las Piñas in Metro Manila as well as parts of Bulacan, Rizal, Laguna, Batangas and Cavite,” it said.
The NGCP said Lines 1 and 2 of the 230-kiloVolt Hermosa-Bataan Combined Cycle Power Plant tripped and isolated the Bataan power plants, resulting in automatic load dropping at Meralco and NGCP feeders at around 1:53 p.m.
The DOE directed the NGCP to submit the list of customers affected by the power interruption and explain the details of the incident.
“The DOE has initiated its coordination with the Energy Regulatory Commission in addressing this matter,” the department said.
https://www.philstar.com/nation/2022/06/19/2189346/parts-luzon-hit-power-outage