China (GB/T 36547-2024) — ride-through requirements

The LVRT, HVRT, FRT envelopes a grid-scale battery must meet under China (GB/T 36547-2024), 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

Applies to: both connections — Electrochemical energy storage stations connecting at 10(6) kV and above.

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. In force 2024-12-01.

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; 0.151s → 0.2 pu; 0.625s → 0.2 pu; ↗ 2s → 0.9 puverified
high-voltage ride-through (HVRT)ride-through0.001s → 1.3 pu; 0.5s → 1.3 pu; 0.501s → 1.25 pu; 1s → 1.25 pu; 1.001s → 1.2 pu; 10s → 1.2 pu; 10.001s → 1.1 puverified
frequency ride-through (FRT)ride-throughHigh: 0.1s → 51.5 Hz; 3600s → 51.5 Hz | Low: 0.1s → 46.5 Hz; 3600s → 46.5 Hzverified

Where these values come from

  • LVRTGB/T 36547—2024《电化学储能电站接入电网技术规定》 (Technical requirements for connecting electrochemical energy storage station to power grid), issued 2024-05-28, in force 2024-12-01, superseding GB/T 36547—2018. Applies to stations connecting at 10(6) kV and above. Clause 8.1.1 and 图1: (a) 电压跌落至零 — ride through at least 150 ms; (b) 跌落至标称电压的20% — at least 625 ms; (c) 跌落至标称电压的90% — at least 2 s. The contour rises linearly between the 0.2 pu and 0.9 pu points, which is why this is published as a ramp. Note to 图1: for three-phase and phase-to-phase faults the assessed quantity is the line voltage at the point of connection; for a single-phase earth fault it is the phase voltage.
  • HVRTGB/T 36547—2024《电化学储能电站接入电网技术规定》 (Technical requirements for connecting electrochemical energy storage station to power grid), issued 2024-05-28, in force 2024-12-01, superseding GB/T 36547—2018. Applies to stations connecting at 10(6) kV and above. Clause 8.2.1 and 图2: (a) 125%–130% of nominal — ride through at least 500 ms; (b) 120%–125% — at least 1 s; (c) 110%–120% — at least 10 s. Clause 8.2.1(d): during the over-voltage the station should hold its pre-fault active power, and maximum charge/discharge current capability shall be at least 1.05 times rated current IN.
  • FRTGB/T 36547—2024《电化学储能电站接入电网技术规定》 (Technical requirements for connecting electrochemical energy storage station to power grid), issued 2024-05-28, in force 2024-12-01, superseding GB/T 36547—2018. Applies to stations connecting at 10(6) kV and above. Clause 9.3.1 表2 (frequency adaptability): below 46.5 Hz the station shall not be charging and disconnects per its minimum allowed frequency or dispatch instruction; 46.5–48.5 Hz it runs continuously, and a charging or idle station must switch to discharging within 0.2 s; 48.5–50.5 Hz is normal operation; 50.5–51.5 Hz it runs continuously, and a discharging or idle station must switch to charging within 0.2 s; above 51.5 Hz it shall not be discharging and disconnects. The table sets no time limit inside 46.5–51.5 Hz, so the band is a continuous-operation requirement rather than a time-limited one. Clause 9.3.2 adds that the station rides through a frequency rate of change up to ±2 Hz/s measured over a 0.5 s window.

Last checked against the source document on .

Other grid codes in Asia-Pacific