Sweden (EIFS 2018:2) — ride-through requirements

The LVRT, FRT envelopes a grid-scale battery must meet under Sweden (EIFS 2018:2), 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 — Type D power park modules under EIFS 2018:2.

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
low-voltage ride-through (LVRT)ride-through0.001s → 0 pu; 0.2s → 0 pu; ↗ 2s → 0.85 pu; 10s → 0.85 pu; 10.001s → 0.9 puverified
frequency ride-through (FRT)ride-throughHigh: 0.1s → 51.5 Hz; 1800s → 51.5 Hz; 1800.001s → 51 Hz | Low: 0.1s → 47.5 Hz; 1800s → 47.5 Hz; 1800.001s → 49 Hzverified

Where these values come from

  • LVRTEnergimarknadsinspektionens foreskrifter EIFS 2018:2 om faststallande av generellt tillampliga krav for natanslutning av generatorer - 3 kap. 36 § (kraftparksmodul av typ D), with 3 kap. 34 § (symmetrical/asymmetrical), 37 § (pre-fault operating point) and 40 § (200 ms three-phase fault case). The code defines a linear recovery ramp; the vertices are read from the clause and the chart draws the segment between them.
  • FRTEnergimarknadsinspektionens föreskrifter EIFS 2018:2, 3 kap. 1 § (allmänna krav för kraftproduktionsmodul av typ A, B, C och D): '30 minuter inom frekvensområde 47,5–48,5 Hz; 30 minuter inom frekvensområde 48,5–49,0 Hz; obegränsad inom frekvensområde 49,0–51,0 Hz; 30 minuter inom frekvensområde 51,0–51,5 Hz'.

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 Sweden compares

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

Other grid codes in Europe