Malaysia (Grid Code Additional Code 2025) — ride-through requirements

The LVRT, FRT envelopes a grid-scale battery must meet under Malaysia (Grid Code Additional Code 2025), 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 — PPMs and energy storage units on the Peninsular grid system.

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; 0.15s → 0 pu; ↗ 1.5s → 0.9 pu; 5s → 0.9 puverified
frequency ride-through (FRT)ride-throughHigh: 0.1s → 52 Hz; 3600s → 52 Hz; 3600.001s → 51.5 Hz; 5400s → 51.5 Hz; 5400.001s → 50.5 Hz | Low: 0.1s → 47 Hz; 10s → 47 Hz; 10.001s → 47.5 Hz; 5400s → 47.5 Hz; 5400.001s → 49.5 Hzverified

Where these values come from

  • LVRTGrid Code for Peninsular Malaysia – Additional Code, KOD/ST/No.9/2025 (Suruhanjaya Tenaga), Connection Code CC.6.4.15.2 and Figure 6 'Power Park Modules and Energy Storage Units Fault Ride Through Requirements'; definition of Energy Storage Unit; CC.6.2.4.1. The code defines a linear recovery ramp; the vertices are read from the clause and the chart draws the segment between them.
  • FRTGrid Code for Peninsular Malaysia – Additional Code, KOD/ST/No.9/2025, Connection Code CC.6.2.3.2 frequency range table.

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 Malaysia compares

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

Other grid codes in Asia-Pacific