Finland (Fingrid VJV2024) — ride-through requirements

The LVRT, HVRT, FRT envelopes a grid-scale battery must meet under Finland (Fingrid VJV2024), digitized breakpoint by breakpoint and checked against the clause it came from.

By Sergey Syrvachev — Director of Product Engineering at HyperStrong

Applies to: both connections — Generating facilities, VJV size classes 1-4, any network level.

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; ↗ 1.5s → 0.85 pu; 10s → 0.85 pu; 10.001s → 0.9 puverified
high-voltage ride-through (HVRT)ride-through0.001s → 1.2 pu; 5s → 1.2 pu; 5.001s → 1.1 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

  • LVRTFingrid, 'Grid Code Specifications for Power Generating Facilities VJV2024', unofficial English translation dated 15.1.2025 - section 10.5.3, Figure 10.10 (type D power park modules), p. 63. The code defines a linear recovery ramp; the vertices are read from the clause and the chart draws the segment between them.
  • HVRTFingrid, 'Grid Code Specifications for Power Generating Facilities VJV2024', unofficial English translation dated 15.1.2025 - section 10.3.3 'Overvoltage withstand capability', Figure 10.4 (p. 48), extended by section 10.5.5.
  • FRTFingrid, 'Grid Code Specifications for Power Generating Facilities VJV2024', unofficial English translation dated 15.1.2025 - section 10.5.2, Figure 10.7 (p. 60).

Last checked against the source document on .

How Finland compares

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

Other grid codes in Europe