Chile (NTSyCS) — ride-through requirements

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

By Sergey Syrvachev — Director of Product Engineering at HyperStrong

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; 0.14s → 0 pu; ↗ 1s → 0.8 puverified
high-voltage ride-through (HVRT)ride-through0.001s → 1.2 pu; 1s → 1.2 pu; 1.001s → 1.1 puverified

Where these values come from

  • LVRTCNE Anexo Tecnico 'Exigencias Minimas de Instalaciones Basadas en Convertidores que se Conecten al SEN' (Res. Ex. 45, 28-01-2026), Art. 3-1(i) + Figura 1 (IBR GFM) and Art. 4-1(b) + Figura 2 (IBR GFL): T0 = 0 ms, T1 = max fault-clearing time per Art. 5-40 NTSyCS, T2 = T1 + 20 ms, T3 = 1000 ms, recovery boundary 0.80 pu. NTSyCS Art. 5-40: 120 ms for >= 200 kV, 400 ms for < 200 kV. Same shape as the superseded NTSyCS Art. 3-7. The code defines a linear recovery ramp; the vertices are read from the clause and the chart draws the segment between them.
  • HVRTCNE Anexo Tecnico IBR (Res. Ex. 45, 28-01-2026), Art. 3-1(i) for IBR GFM and Art. 4-1(b) for IBR GFL: 'En caso de sobretensiones mayores a 1,1 y menores o iguales a 1,2 por unidad, la IBR ... debera operar de manera continua e ininterrumpida durante al menos 1 segundo.'.

Read it yourself: CNE Anexo Técnico IBR, Res. Ex. 45 (PDF) ↗

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 Chile compares

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

Other grid codes in South America