Transient overvoltage (IEEE 2800 TOV) — ride-through requirements

The HVRT envelope a grid-scale battery must meet under Transient overvoltage (IEEE 2800 TOV) (US), digitized breakpoint by breakpoint and checked against the clause it came from.

By Sergey Syrvachev — Director of Product Engineering at HyperStrong

Applies to: transmission connections — IBR at transmission and sub-transmission (IEEE 2800 scope). Values read from an authorised reproduction of a paywalled standard.

Part of: the grid-code ride-through chart — compare this against 65 other standards in 44 countries.

What this is, and is not. A reading aid compiled from the clause cited below — not a compliance document. The primary text governs. Every value here was read from a current primary source.

Breakpoints

Times are seconds from the start of the disturbance. Voltage is per-unit of nominal; frequency in hertz. An LVRT curve is a lower boundary (stay connected while voltage is on or above it), an HVRT curve an upper boundary, and FRT gives the band between its High and Low boundaries. These are the boundaries, not the behaviour: what holding one demands of the converter — reactive current injection, thermal stress, protection timing — is stepped through in the LVRT / HVRT ride-through visual.

EventDutyBreakpointsStatus
high-voltage ride-through (HVRT)ride-through0.0001s → 1.8 pu; 0.0002s → 1.8 pu; 0.00021s → 1.7 pu; 0.001s → 1.7 pu; 0.00101s → 1.6 pu; 0.003s → 1.6 pu; 0.00301s → 1.4 pu; 0.015s → 1.4 pu; 0.0151s → 1.2 puverified

Where these values come from

  • HVRTIEEE 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.

Read it yourself: IEEE 2800-2022 at IEEE SA (the standard itself; purchase required) ↗

Any event not in the table above is not plotted for this code. Where an absence is itself the finding — a code that defines no high-voltage envelope, or one whose curves circulate under another country's name — it is recorded in the grid codes with no ride-through curve.

Last checked against the source document on .

How US compares

Each event this code defines, put side by side with every other code that defines it:

Other grid codes in North America