Data Centers Would Become Registered Grid Entities Under NERC Drafts

The North American Electric Reliability Corporation has three draft reliability standards written specifically for data centers out for comment, and the window closes September 18. A separate comment period on disturbance performance for computational loads runs through September 24. The drafts, numbered CLO-001-1, CLO-002-1 and CLO-003-1, are the first mandatory standards NERC has proposed that would apply to the load side of a large interconnection rather than to generators and transmission owners.

The work follows a July 16 order in which the Federal Energy Regulatory Commission, in Docket RD26-7-000, directed NERC to file new or modified reliability standards, changes to its Rules of Procedure, and revised registry criteria by December 31, 2026. FERC did not set a size threshold or define compliance obligations itself, leaving those to NERC's standards process. The commission pointed to grid events in which large data center loads responded to and amplified instability, and to NERC findings that cryptocurrency mining facilities can drop between 17 and 95 percent of pre-disturbance consumption within milliseconds of a transmission fault.

The three drafts divide the scope. CLO-001-1 covers interconnection, studies and modeling data. CLO-002-1 covers operational data and communications between the facility and the grid operator. CLO-003-1 covers protection coordination and disturbance monitoring. Alongside them, NERC has proposed registry criteria that would make a computational load entity a registered functional entity on the bulk power system. An earlier draft drew the line at one megawatt of information technology equipment load and 20 megawatts of aggregate connected load at a single point of interconnection at 60 kilovolts or above. NERC raised both the megawatt and kilovolt thresholds in a revision posted August 19.

Registration would not be a filing exercise. The proposal calls for real-time coordination with the grid operator, compliance with operating instructions, training tied to those obligations, and performance requirements that include disturbance ride-through and ramp rate limits. On the job, that turns protection coordination and disturbance monitoring from design preferences into evidence a facility has to produce. Relay coordination studies, monitoring at the service entrance, and coordination between the utility protection scheme and the campus distribution become compliance artifacts rather than closeout paperwork.

Ride-through is the requirement with the longest reach into the electrical scope. Holding load through a voltage disturbance rather than dropping it depends on how the gear inside the fence is set and tested: medium-voltage switchgear, protective relays, static transfer switches, uninterruptible power supplies and generator paralleling equipment. Nothing in the proposal changes a journey-level card or a state licensing exam. What it changes is what a data center owner needs documented, which raises the value of medium-voltage experience, relay and switchgear testing, and the habit of producing records that survive an audit.

Comments on the registry criteria and the three standards close September 18. The disturbance performance comment period closes September 24. NERC's filing is due at FERC by the end of the year.