COMPLIANCE
Grid compliance is an engineering problem.
AI data centers are now large loads visible to grid protection systems. The standards below define what recovery looks like — DPO is designed to meet them.
BACKGROUND
Why these standards now
In July 2024, six large data centers in Texas tripped offline simultaneously during a grid disturbance — exposing the gap between current rack power design and grid interconnection requirements. Regulators responded: ERCOT NOGRR 282 establishes mandatory post-fault active power recovery requirements for large loads, effective January 2028.1,2
REGULATORY REQUIREMENTS
Standards DPO is designed against
ERCOT · NOGRR 282
Post-Fault Active Power Recovery
PFAPR ≥ 90% active power recovery within 1 second of voltage return.3
NOGRR 282, §2.14
Mandatory: January 2028
DPO is designed to meet this requirement.
WHERE THIS IS HAPPENING
VRT/PFAPR rules are converging across nine jurisdictions.
ERCOT is the first to publish quantified requirements. Comparable rules are in flight across federal NERC, four US ISOs, Canada, two EU regulators, and Australia.4
| Region | Authority / TSO | Regulation | Timeline | Why It Matters |
|---|---|---|---|---|
| US — Federal | NERC | Reliability Guideline May 2026 + Standards Project | RG published May 2026 · FERC submission target end-2026 | First federal-level "rack-level energy storage" recommendation; sets floor below ISO/RTO variations |
| US — Texas | ERCOT | NOGRR 282 + NPRR 1308 | Transition late-2025 → 2026/9 · Full enforcement 2028/01 | ~10% of US DC capacity in ERCOT; first jurisdiction with quantified VRT/PFAPR rules |
| US — California | CAISO | Large Loads Technical Requirements (Stakeholder WG) | Issue Paper 2026-01 · Straw Proposal April 2026 | 4.5 GW DC studied in 2025-26; first regulator to name "AI-training pulsating load" as risk class |
| US — Virginia | Dominion Energy | Facility Interconnection Reqs. | In effect (case-by-case) | World's largest DC cluster (NoVa); 2024/07 Fairfax 1.5 GW trip event |
| US — Central | SPP | RR 696 (HILL) + HILL FRT v1.0 | RR 696 approved 2025/9 · FRT v1.0 2025/8 | 14-state DC corridor; threshold drops to 10 MW |
| Canada — Ontario | IESO | TR for Large Computational Loads v1.0 | Published 2026-05-01 · stakeholder feedback to 2026-05-28 | First fully-published large-load spec with explicit AIDC naming; strictest FRT envelope in NA |
| Ireland | EirGrid + SONI | MPID345 Grid Code Mod. (draft) | Draft 2025/11 · Rollout 2026 – 2028 | DCs ≈ 22% of Irish national power; first FRT draft to name DCs |
| Germany | VDE FNN | VDE-AR-N 4130 + A1 amendment | A1 draft 2025/10–11 (revising) | Largest DC market in Europe (490+ facilities) |
| Australia | AEMC + AEMO | Draft Rule (Large IBL ≥ 30 MW) | Final rule mid-2026 | APAC's first DC-specific rule; aligns with Texas / Ireland |