The Texas Public Utility Commission on Thursday unanimously approved rules that will require large computational loads, like data centers and crypto-mining facilities, within the Electric Reliability Council of Texas footprint to stay stable and connected to the grid through disruptions.
Modern computational loads, Kenteel Engineering said in a June blog, are “engineered to protect extremely sensitive and expensive equipment,” and during a voltage dip are programmed to disconnect or enter momentary cessation.
However, this presents a reliability problem, Kenteel Engineering said, as when “several hundred — or several thousand — megawatts of computational load all detect the same sag and drop simultaneously, the grid experiences a sudden, large loss of demand.”
“As LCLs increase on the ERCOT System, similar events would be expected to increase in magnitude and frequency, leading to frequency instability and other reliability problems absent frequency and voltage ride-through requirements,” the Texas PUC rules state.
The rules don’t immediately penalize facilities that fail to ride through a qualifying event, Kenteel Engineering noted, but instead put them “on the clock” to investigate and report the root cause within 90 days of ERCOT’s request, “develop a corrective plan within 90 days of completing that investigation, and implement the approved plan within 180 days unless ERCOT grants more time.”
“Overriding all of that, if ERCOT judges that continued operation poses an imminent risk to local or system reliability, it can order the [large electric load] — and keep it disconnected — until the Customer demonstrates compliance to ERCOT’s satisfaction,” Kenteel Engineering said.
In comments, the Data Center Coalition argued that the PUC lacks the statutory authority to “impose the binding and ongoing operational requirements contained in [the rules] directly on retail customers — a category of entity that the Legislature deliberately excluded from ERCOT’s authority.”
Texas Industrial Energy Consumers made similar comments, writing, “Unlike Market Participants who must agree to comply with and be bound by all ERCOT Protocols as a condition of participating in the wholesale market, pure retail loads have made no such commitment and have no such obligation.”
TIEC also argued that ERCOT lacks the expertise to “develop reasonable operational requirements for complex, costly manufacturing equipment. It is completely inappropriate to give ERCOT the ability to directly regulate businesses who are not participating in the wholesale market and are not otherwise regulated entities.”