Romania (Transelectrica/ANRE storage norm) — ride-through requirements

The LVRT, FRT envelopes a grid-scale battery must meet under Romania (Transelectrica/ANRE storage norm) (Romania), 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; 0.95s → 0 pu; 0.951s → 0.21 pu; 1.65s → 0.21 pu; 1.651s → 0.43 pu; 2.35s → 0.43 pu; 2.351s → 0.64 pu; 3s → 0.64 pu; 3.001s → 0.85 pu; 3600s → 0.9 pu verified
frequency ride-through (FRT) ride-through High: 0.1s → 51.5 Hz; 1800s → 51.5 Hz; 1800s → 51 Hz | Low: 0.1s → 47.5 Hz; 1800s → 47.5 Hz; 1800s → 49 Hz verified

Where these values come from

  • LVRT Normă tehnică privind cerinţele tehnice de racordare ... pentru instalaţiile de stocare a energiei electrice, aprobată prin Ordinul ANRE nr. 3/2023 din 18.01.2023 (Monitorul Oficial al României, Partea I, Nr. 53/19.I.2023; în vigoare 20.01.2023) — Art. 15 lit. a) pct. (ii), Fig. 4 + Tabelul 5 (IS de categoria D).
  • FRT Ordinul ANRE nr. 3/2023 din 18.01.2023 (MO Nr. 53/19.I.2023) — Art. 6 alin. (1) lit. a) + Tabelul 1 'Durata minimă în care IS trebuie să fie capabilă să rămână conectată la rețea pentru frecvențe care se abat de la valoarea nominală'.

Last checked against the source document on .

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