Denmark (TR 3.3.1) — ride-through requirements

The LVRT, FRT envelopes a grid-scale battery must meet under Denmark (TR 3.3.1) (Denmark), digitized breakpoint by breakpoint and checked against the clause it came from.

By Sergey Syrvachev — Director of Product Engineering, grid-scale BESS · 10+ GWh delivered

Part of: the grid-code ride-through chart — compare this against 63 other standards in 42 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.

Event Duty Breakpoints Status
low-voltage ride-through (LVRT) ride-through 0.001s → 0 pu; 0.15s → 0 pu; 0.3s → 0.094 pu; 0.45s → 0.189 pu; 0.6s → 0.283 pu; 0.75s → 0.378 pu; 0.9s → 0.472 pu; 1.05s → 0.567 pu; 1.2s → 0.661 pu; 1.35s → 0.756 pu; 1.5s → 0.85 pu verified
frequency ride-through (FRT) ride-through High: 0.1s → 51.5 Hz; 1800s → 51 Hz | Low: 0.1s → 47.5 Hz; 1800s → 48.5 Hz; 3600s → 49 Hz verified

Where these values come from

  • LVRT Energinet Technical Regulation 3.3.1 – Revision 6 (14 Feb 2025, effective 1 May 2025), Part 16, section 128(1) and Table 45 (DK1); section 129(1) and Table 46 (DK2); cf. sections 90/114 Tables 39/40/43/44 for distribution-connected categories.
  • FRT Energinet Technical Regulation 3.3.1 – Revision 6, Tables 30/32/34/36 (normal frequency operating range, transmission-connected, DK1 and DK2: 47.5–48.5 or 47.5–48.0 / 30 min, 48.5–49.0 or 48.0–49.0 / 30 min, 49.0–51.0 unlimited, 51.0–51.5 / 30 min) and section 68(1)/69(1) proviso on 60 minutes below 49.00 Hz; protection settings f< 47.5 Hz / 200 ms and f> 51.5 Hz / 200 ms are separate trip settings.

Last checked against the source document on .

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