Monday, April 15, 2019

Luzon grid on 10-hour yellow alert despite low-demand weekend


Updated By Myrna Velasco

Even with the drop in electricity demand on Saturday, Luzon grid was placed on a 10-hour yellow alert or scant power reserve condition due to the forced outage of the Limay plant in Bataan.
The San Gabriel plant of First Gen Corporation was also de-rated to 210 megawatts (MW) from its 420 MW installed capacity generation level, the Department of Energy (DOE) also reported.
These twin incidents in the power system prompted the declaration of a fresh round of yellow alert by system operator National Grid Corporation of the Philippines (NGCP) – even if the demand had been anticipated to taper off during the weekend because most business offices, as well as government entities, are closed.
The 10-hour yellow alert condition was raised from 10 a.m. to 5 p.m. and then from 7 p.m. to 10 p.m.
Early Saturday, NGCP’s forecast of peak demand was placed at 9,735 MW vis-a-vis 10,277 MW of availability capacity, leaving a very thin reserve of 158 MW. By mid-day, demand was anticipated to peak at 9,463 MW against the available capacity of 10,063 MW, thus, reserve was still strained at just the level of 223 MW. Evening forecast was bracing for the worst as reserve level was just seen at 20 MW, with peak demand climbing to 9,913 MW against the available capacity of 10,326 MW.
Meanwhile, the same plants on forced outages the past two weeks were still on same status, except for the 135-MW unit 1 of the South Luzon Thermal Energy Corp (SLTEC) of the Ayala group which was already synchronized back to the grid Saturday morning.
For the First Gen plant, DOE said the “the restriction will only take effect over the weekend to give way to the necessary line pack recovery in preparation for the weekend demand.”
It was further noted that the company’s other plant – the 1,000-MW Santa Rita gas-fired facility – “will be operating on liquid fuel to ensure that all units of the Santa Rita, San Lorenzo, and San Gabriel plants will be able to run on their maximum outputs,” according to the DOE. The fuel shift though is anticipated to result in higher priced electricity that will be fed to the grid.
Given the incessant yellow and red alert circumstances in the Luzon grid, advocacy group CitizenWatch Philippines called on the DOE and the power industry players “to explain the real power supply situation,” noting that the current pronouncements of the department “may not be truly reflective of the current situation as there were power interruptions.”
CitizenWatch Convenor Hannah Viola stressed that “what is truly alarming is the disconnect about what is being publicly disclosed and what is really happening.”
Sen. Sherwin Gatchalian, Senate Committee on Energy chairman, recalled a meeting two weeks ago in which DOE officials assured him there is ample supply of electricity reserve throughout the dry season.
“The brownouts felt by our constituents in Luzon these past few days are totally unacceptable. The DOE assured us even before the start of summer that there will be enough power supply in the country. If there’s enough power supply, then how come that there are towns and provinces in Luzon that are experiencing rotational brownouts,” he pointed out
“Definitely, heads must roll this time. We owe it to the power consumers to give them accurate information on the power situation in the country. It seems the DOE overestimated the availability of power supply,” he added.
Viola emphasized that “Luzon grid’s insufficient power reserves have consistently left Luzon, including the National Capital Region – either on the brink of a shortage or saddled with rotational brownouts.”
Viola likewise said “the situation has led not only to inconvenience among consumers but also to increased electricity cost and economic loss, not to mention recurring fears of collusion among power producers.” (With a report from Mario B. Casayuran)

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