Transient overvoltage (IEEE 2800 TOV) ride-through requirements
High-voltage ride-through for the United States. Every breakpoint below is read from the code itself, and where a point was taken off a published figure rather than stated in the clause, the section under that chart says so — a table read from an authorised reprint.
What is the high-voltage ride-through envelope for Transient overvoltage (IEEE 2800 TOV)?
The plant must ride through for any voltage that stays on or below this envelope. The envelope holds 1.8 pu from t = 0 to 0.2 ms; then 1.7 pu from 0.2 ms to 1 ms; then 1.6 pu from 1 ms to 3 ms; then 1.4 pu from 3 ms to 15 ms; then 1.2 pu from 15 ms onward — the last band the envelope defines, with no stated end time.
Read from an authorised reprint of the table rather than the standard itself, and cross-checked against the other codes cited below.
Applies to IBR at transmission and sub-transmission (IEEE 2800 scope)
| From | To | Voltage | Between the points |
|---|---|---|---|
| 0 | 0.2 ms | 1.8 pu | Held flat |
| 0.2 ms | 1 ms | 1.7 pu | Held flat |
| 1 ms | 3 ms | 1.6 pu | Held flat |
| 3 ms | 15 ms | 1.4 pu | Held flat |
| 15 ms | no stated end | 1.2 pu | Held flat |
The clause this came from
IEEE 2800-2022 Table 14 (transient overvoltage ride-through), reproduced with IEEE copyright permission on slide 48 of the official IEEE PES / IEEE 2800 WG + SEIA/ACP joint webinar: 'V > 1.80 — see footnote a (surge protection); V > 1.70 — 0.2 ms; V > 1.60 — 1.0 ms; V > 1.40 — 3.0 ms; V > 1.20 — 15.0 ms', footnote c 'specified voltage magnitudes are the residual voltages with surge arresters applied', footnote d 'cumulative time over a 1-min time window', axis label 'Voltage at RPA (per unit of nominal instantaneous peak base)'. Clause text quoted in P. Pourbeik (PEACE/Invenergy), 'Thoughts on IEEE 2800-2022 TOV Ride-Through Requirement', ERCOT IBRWG 14 Jun 2024. Independently corroborated by the ERCOT NOGRR245 capability form, whose TOV rows are footnoted '*These requirements are from IEEE 2800-2022': 1.8 pu → 0.0002 s, 1.7 → 0.001 s, 1.6 → 0.003 s, 1.4 → 0.015 s.
Who does Transient overvoltage (IEEE 2800 TOV) bind, and since when?
IBR at transmission and sub-transmission (IEEE 2800 scope). No date of effect is published here — grid codes are reissued, so check the current issue before relying on it.
These figures are a reading aid, not legal advice. Grid codes are reissued: verify against the current edition before you design to them.
Digitised operating parameters beyond ride-through — droop, reactive capability, operating ranges — are published for 36 of the 66 codes in this atlas, not yet for Transient overvoltage (IEEE 2800 TOV). That is a gap on this site, not a statement that Transient overvoltage (IEEE 2800 TOV) sets none — the atlas hub marks the codes that carry them.
Curve data last checked against the code on — 66 standards, 130 envelopes, published by bess.engineer under CC BY 4.0.
Questions this page answers about Transient overvoltage (IEEE 2800 TOV)
- Does Transient overvoltage (IEEE 2800 TOV) require ride-through, or only that the plant does not trip?
- Ride-through. Every envelope on this page is a performance duty the plant must meet, not a protection-setting no-trip boundary — they are different obligations. That is what these curves are; they are not everything Transient overvoltage (IEEE 2800 TOV) contains. The requirement sentence under each chart says which side of the curve is the compliant one.
- Are the numbers on this page taken from Transient overvoltage (IEEE 2800 TOV) itself?
- Every breakpoint is read from the code, and where a point was taken off a published figure rather than stated in the clause, the section under that chart says so — on this page that includes a table read from an authorised reprint. The clause each curve came from is quoted under it.
- Which events are charted for Transient overvoltage (IEEE 2800 TOV)?
- Transient overvoltage (IEEE 2800 TOV) is charted here with 1 envelope — high-voltage ride-through (HVRT). No low-voltage or frequency envelope is charted here — check Transient overvoltage (IEEE 2800 TOV) itself before concluding it sets none.
Ride-through, in context.
An envelope is a compliance boundary; understanding why it exists is a different question. The ride-through and grid-forming entries cover the engineering, and the Engineering Foundations course builds it from the physics up.
Also for the United States: NERC PRC-024-4 (ERCOT), NERC PRC-024-4 (no-trip), NERC PRC-024-4 (Western), NERC PRC-029-1 (IBR), NERC PRC-029-1 (Table 1: AC-connected wind IBR), California Rule 21, and 5 more