Level 3 alerts, the highest on the Electric Reliability Council of Texas (ERCOT) scale, are when rolling outages are triggered. A level 2 keeps large industrial users offline. Level 1, the lowest level, triggers conservation efforts. The EEA3 was triggered early Sunday morning due to a surge in demand during historic winter weather conditions. It's the longest period of time the state's grid operator has been in a critical state.
The last time was 2011 when the EEA3 lasted for just a day.
ERCOT reported a system capacity Friday of more than 64,000 megawatts, a little more than 10,000 megawatts more than the current demand. One megawatt of electricity can power around 200 homes during periods of peak demand.
ERCOT CEO and President Bill Magness and Senior Director of System Operations Dan Woodfin said operations have returned to normal, though conservation is still encouraged.
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According to poweroutage.us, more than 190,000 customers were still without electricity Friday morning in the state. The largest impacts were along a line from Temple, in central Texas, eastward to the Louisiana border, including the Lufkin and Nacogdoches area. In west-central Texas, the Fredericksburg area reported just under half of Gillespie County's 15,400 customers were still in the dark. In Edwards County, northwest of San Antonio, 53% of the service area was still without power.
The outlook was more promising in the Houston area. CenterPoint Energy reported just under 6,500 customers had no power Friday morning, representing .25% of the total served. Entergy reported just under more than 3,800 customers were without power.
Gov. Greg Abbott said Thursday that the remaining power outages were not due to a lack of generation like earlier in the week. Instead, the outages were because of other issues like downed lines.
"Every available repair truck has been dispatched to repair those downed power lines," said Abbott.
CenterPoint Energy officials said Thursday crews restored approximately 1.3 million customers in a 24-hour period.
Magness and Woodfin faced another day of questioning after the ongoing power outage debacle left thousands in desperate situations.
ERCOT's leaders were asked about whether they would be winterizing the power grid, but according to them, that's not their responsibility.
"We don't own the generation units," Magness said. "We don't own the transmission. We're really just managing the overall transmission system and dispatching, putting generators on and off the grid."
He added that winterization will need to be undertaken by the entities who own the physical assets out in the field.
"We're willing to work and help and make sure those are effective and happy to help with any of the industry on that," Magness continued. "But it's not really our role to do winterization."
The Texas Public Utility Commission issued an order Wednesday mandating that all electric transmission and distribution utilities perform rolling blackouts in a manner that no customer is without power for more than 12 hours. It's unclear if the order would be effective though, as utility providers were not able to keep up with the demand for electricity this week.
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