Mexico (Codigo de Red) ride-through requirements

Low-voltage ride-through, High-voltage ride-through, Frequency ride-through for Mexico. Every breakpoint below is read from the code itself, and carries the clause it came from — so you can check it, not just cite it.

3Envelopes
LVRT · HVRT · FRTEvents
Transmission & distribution Connection level
LVRT

What is the low-voltage ride-through envelope for Mexico (Codigo de Red)?

The plant must ride through for any voltage that stays on or above this envelope. The envelope holds 0 pu from t = 0 to 250 ms; then 0 pu from 250 ms to 350 ms; then 0 pu from 350 ms to 450 ms; then ramps linearly from 0 pu at 450 ms to 0.45 pu at 1.05 s; then ramps linearly from 0.45 pu at 1.05 s to 0.9 pu at 1.5 s; then 0.9 pu from 1.5 s onward — the last band the envelope defines, with no stated end time.

The clause states this boundary as a line; intermediate points are interpolated between its stated vertices.

Applies to Power plants interconnecting to the SEN (RNT or RGD)

Mexico (Codigo de Red) — low-voltage ride-through envelopeMexico (Codigo de Red) low-voltage ride-through envelope. The plant must ride through for any voltage that stays on or above the line; below it, the envelope no longer applies. Logarithmic time axis from 0.01 s to 5 s; linear voltage axis in per-unit. The first band applies from the instant of the event (t = 0). The envelope holds 0 pu from t = 0 to 250 ms; then 0 pu from 250 ms to 350 ms; then 0 pu from 350 ms to 450 ms; then ramps linearly from 0 pu at 450 ms to 0.45 pu at 1.05 s; then ramps linearly from 0.45 pu at 1.05 s to 0.9 pu at 1.5 s; then 0.9 pu from 1.5 s onward — the last band the envelope defines, with no stated end time (drawn as an open dashed tail).Mexico (Codigo de Red) — low-voltage ride-through envelopenominal 1.00 pu0.010.110.000.200.400.600.801.001.20Time from event start (s, log scale) · first band applies from t = 0Voltage (pu)0.9 puMUST RIDE THROUGHmust ride through on or above the lineopen — no stated end time
Low-voltage ride-through envelope for Mexico (Codigo de Red). Time runs on a logarithmic axis, so the ramp — a straight line in real time — only looks curved here. Scroll the chart sideways for the rest of the time axis →
Low-voltage ride-through breakpoints for Mexico (Codigo de Red)
From To Voltage Between the points
0 250 ms 0 pu Held flat
250 ms 350 ms 0 pu Held flat
350 ms 450 ms 0 pu Held flat
450 ms 1.05 s 0 → 0.45 pu Ramps linearly
1.05 s 1.5 s 0.45 → 0.9 pu Ramps linearly
1.5 s no stated end 0.9 pu Held flat
The clause this came from

Codigo de Red, CRE Resolucion RES/550/2021, DOF 31 December 2021, pp.1068-1069; 'Manual Regulatorio de Requerimientos Tecnicos para la Interconexion de Centrales Electricas al Sistema Electrico Nacional', Capitulo 4, seccion 4.2.1, Tabla 4.2.1.B / Figura 4.2.1.B. Verified from the official DOF PDF (dof.gob.mx/2021/CRE/CRE_311221.pdf), text extracted directly.

HVRT

What is the high-voltage ride-through envelope for Mexico (Codigo de Red)?

The plant must ride through for any voltage that stays on or below this envelope. The envelope holds 1.3 pu from t = 0 to 200 ms; then 1.1 pu from 200 ms onward — the last band the envelope defines, with no stated end time.

Every breakpoint is stated in the clause cited below.

Applies to Power plants interconnecting to the SEN (RNT or RGD)

Mexico (Codigo de Red) — high-voltage ride-through envelopeMexico (Codigo de Red) high-voltage ride-through envelope. The plant must ride through for any voltage that stays on or below the line; above it, the envelope no longer applies. Logarithmic time axis from 0.01 s to 1 s; linear voltage axis in per-unit. The first band applies from the instant of the event (t = 0). The envelope holds 1.3 pu from t = 0 to 200 ms; then 1.1 pu from 200 ms onward — the last band the envelope defines, with no stated end time (drawn as an open dashed tail).Mexico (Codigo de Red) — high-voltage ride-through envelopenominal 1.00 pu0.010.110.020.050.20.50.901.001.101.201.301.40Time from event start (s, log scale) · first band applies from t = 0Voltage (pu)1.1 puMUST RIDE THROUGHmust ride through on or below the lineopen — no stated end time
High-voltage ride-through envelope for Mexico (Codigo de Red). Time runs on a logarithmic axis. Scroll the chart sideways for the rest of the time axis →
High-voltage ride-through breakpoints for Mexico (Codigo de Red)
From To Voltage Between the points
0 200 ms 1.3 pu Held flat
200 ms no stated end 1.1 pu Held flat
The clause this came from

Codigo de Red, CRE Resolucion RES/550/2021, DOF 31 December 2021, p.1069; 'Manual Regulatorio de Requerimientos Tecnicos para la Interconexion de Centrales Electricas al Sistema Electrico Nacional', Capitulo 4, seccion 4.2.1, Tabla 4.2.1.B points PA1/PA2/PA3, and Figura 4.2.1.B. Verified from the official DOF PDF, text extracted directly.

FRT

What is the frequency ride-through envelope for Mexico (Codigo de Red)?

The plant must ride through between the upper and lower bands. The upper (over-frequency) band holds 62.4 Hz from t = 0 to 15 min; then 61.8 Hz from 15 min to 30 min; then 61.2 Hz from 30 min onward — the last band the envelope defines, with no stated end time. The lower (under-frequency) band holds 57 Hz from t = 0 to 15 min; then 58.2 Hz from 15 min to 30 min; then 58.8 Hz from 30 min onward — the last band the envelope defines, with no stated end time.

Every breakpoint is stated in the clause cited below.

Applies to Power plants interconnecting to the SEN (RNT or RGD)

Mexico (Codigo de Red) — frequency ride-through envelopeMexico (Codigo de Red) frequency ride-through envelope. The plant must ride through for any frequency that stays between the lower and upper bands. Logarithmic time axis from 10 s to 10000 s; linear frequency axis in hertz. The first band applies from the instant of the event (t = 0). upper (over-frequency) band: holds 62.4 Hz from t = 0 to 15 min; then 61.8 Hz from 15 min to 30 min; then 61.2 Hz from 30 min onward — the last band the envelope defines, with no stated end time (drawn as an open dashed tail). lower (under-frequency) band: holds 57 Hz from t = 0 to 15 min; then 58.2 Hz from 15 min to 30 min; then 58.8 Hz from 30 min onward — the last band the envelope defines, with no stated end time (drawn as an open dashed tail).Mexico (Codigo de Red) — frequency ride-through envelopenominal 60 Hz101001000100005658606264Time from event start (s, log scale) · first band applies from t = 0Frequency (Hz)61.2 Hz58.8 HzMUST RIDE THROUGHUpper band (over-frequency)Lower band (under-frequency)must ride through between the bandsopen — no stated end time
Frequency ride-through envelope for Mexico (Codigo de Red). Time runs on a logarithmic axis. Scroll the chart sideways for the rest of the time axis →

Upper limit

Frequency ride-through breakpoints for Mexico (Codigo de Red) — Upper limit
From To Frequency Between the points
0 15 min 62.4 Hz Held flat
15 min 30 min 61.8 Hz Held flat
30 min no stated end 61.2 Hz Held flat

Lower limit

Frequency ride-through breakpoints for Mexico (Codigo de Red) — Lower limit
From To Frequency Between the points
0 15 min 57 Hz Held flat
15 min 30 min 58.2 Hz Held flat
30 min no stated end 58.8 Hz Held flat
The clause this came from

Codigo de Red, CRE Resolucion RES/550/2021, DOF 31 December 2021, pp.1053-1054; 'Manual Regulatorio de Requerimientos Tecnicos para la Interconexion de Centrales Electricas al Sistema Electrico Nacional', Capitulo 2, seccion 2.1, Tabla 2.1. Verified from the official DOF PDF, text extracted directly.

Steady state

How long must the plant keep operating outside nominal voltage under Mexico (Codigo de Red)?

The ride-through envelopes above answer how deep a disturbance the plant must survive. These bands answer the other question Mexico (Codigo de Red) settles: how long it must keep operating at a voltage that is off nominal but steady.

A blue band ending in an arrow runs on, because the code states no end for it; a copper bar stops at the time the code prints, and only that right-hand end is data — every bar starts at the left edge of the axis.

Tabla 3.1.1 binds types B, C and D, and one table covers every interconnected system. Voltage times are per event, unlike the frequency times in the same code, which are cumulative over the plant's service life. CENACE may shorten them where an overvoltage coincides with an underfrequency, or an undervoltage with an overfrequency (§3.1.1(iii)).

Steady-state voltage operating bands

pu of nominal voltage at the interconnection point (Punto de Interconexión), Tabla 3.1.1 column 'Rango de tensión del Punto de Interconexión'); duration column 'Tiempo mínimo de operación', per event

Mexico (Codigo de Red) — steady-state voltage operating bandsMexico (Codigo de Red): steady-state voltage operating bands, pu of nominal voltage at the interconnection point (Punto de Interconexión), Tabla 3.1.1 column 'Rango de tensión del Punto de Interconexión'); duration column 'Tiempo mínimo de operación', per event. 0.9 to 0.95: at least 30 minutos; 0.95 to 1.05: Ilimitado (unlimited) — the code states no end for this band; 1.05 to 1.1: at least 30 minutos. Minimum operating time runs on a logarithmic axis. Source: Manual Regulatorio de Requerimientos Técnicos para la Interconexión de Centrales Eléctricas al SEN, §3.1.1(i) and Tabla 3.1.1 (Código de Red, RES/550/2021, DOF 31 Dec 2021, printed p. 1059).15 min30 min1 h30 minutos0.950.9Ilimitado (unlimited)1.0530 minutos1.1nominalMinimum operating time (log scale)
Manual Regulatorio de Requerimientos Técnicos para la Interconexión de Centrales Eléctricas al SEN, §3.1.1(i) and Tabla 3.1.1 (Código de Red, RES/550/2021, DOF 31 Dec 2021, printed p. 1059) Scroll the chart sideways for the durations →
Beyond ride-through

Operating requirements beyond the envelopes.

The figures above are what Mexico (Codigo de Red) demands during a disturbance and while it sits off nominal. The rows below are the same regime’s operating and fault-response requirements — reactive capability, frequency response, continuous operating range, ramp rate, RoCoF withstand and fault-current injection — each researched from the document its own row cites, separately from the plotted corpus. Every row carries its clause and a verbatim quote, so you can check it the same way, including the continuous-operating-range row the staircases above are drawn from.

Supplementary operating requirements for Mexico (Codigo de Red)
Requirement What the code states Clause
P-Q envelope, asynchronous plants Reactive capability Power factor at least 0.95 lagging / 0.95 leading at the Point of Interconnection; mandatory 'white area' Q/Pmáx = ±0.33 between 0.95 and 1.05 pu (grey area up to ±0.5 optional but not to be limited if feasible); Pmáx = net installed capacity Binds Centrales Eléctricas Asíncronas (asynchronous = interconnected via power electronics, so BESS qualifies) of types B, C and D (>0.5 MW in the Sistema Interconectado Nacional; type A <0.5 MW is outside the Manual). Measured at the Punto de Interconexión. Per Figura 3.5.1 (visually verified) the full ±0.33 band is required from P = 0.5 pu up to 1.0 pu and the mandatory envelope tapers (V-shape) below 0.5 pu toward zero; below Pmáx and down to Pmin the plant must deliver any point inside the white zone of the V-P-Q profile (§3.5.2). Storage applicability: via generation-scoped rule — the Manual binds 'Centrales Eléctricas'; a BESS is registered under the figure of Central Eléctrica (Acuerdo A/113/2024, considerando Vigésimo Primero) and DACG A/113/2024 numeral 2.3 (DOF 7 Mar 2025) expressly obliges storage systems (SAE) in all modalities to comply with the Código de Red as applicable; the Código de Red itself addresses SAE in Criterio INTE-20. The type-size thresholds (>0.5 MW for types B, C and D; type A <0.5 MW) are cited from the Manual but are not carried in the quoted text. §3.5.1(i)-(ii) and Figura 3.5.1, Manual Regulatorio de Requerimientos Técnicos para la Interconexión de Centrales Eléctricas al Sistema Eléctrico Nacional (Código de Red, RES/550/2021, DOF 31 Dec 2021, printed p. 1062) + Same Manual, Tabla 3.3.2 'Parámetros del Área Blanca o Requerimiento Mínimo para Centrales Eléctricas Síncronas y Asíncronas' (referenced by §3.5.1(ii); Código de Red, RES/550/2021, DOF 31 Dec 2021, printed p. 1060)
The clauses this row cites

§3.5.1(i)-(ii) and Figura 3.5.1, Manual Regulatorio de Requerimientos Técnicos para la Interconexión de Centrales Eléctricas al Sistema Eléctrico Nacional (Código de Red, RES/550/2021, DOF 31 Dec 2021, printed p. 1062) — “ La Central Eléctrica Asíncrona debe tener la capacidad de mantener su potencia reactiva en un rango de factor de potencia de al menos 0.95 en atraso y 0.95 adelanto en el Punto de Interconexión. […] La Central Eléctrica Asíncrona tipo B, C o D debe cumplir el perfil V-P-Q/Pmáx de la Figura 3.5.1 y Figura 3.5.2 de conformidad con los valores de la Tabla 3.3.2 ” Translation: “ The Asynchronous Power Plant must have the capability to maintain its reactive power within a power factor range of at least 0.95 lagging and 0.95 leading at the Point of Interconnection. […] The Asynchronous Power Plant of type B, C or D must comply with the V-P-Q/Pmáx profile of Figure 3.5.1 and Figure 3.5.2 in accordance with the values of Table 3.3.2 ” (Resolución Núm. RES/550/2021 — Código de Red (Manual Regulatorio de Requerimientos Técnicos para la Interconexión de Centrales Eléctricas al SEN), accessed 2026-08-09)

Same Manual, Tabla 3.3.2 'Parámetros del Área Blanca o Requerimiento Mínimo para Centrales Eléctricas Síncronas y Asíncronas' (referenced by §3.5.1(ii); Código de Red, RES/550/2021, DOF 31 Dec 2021, printed p. 1060) — “ Límite del Área Gris (opcional y no limitativa) | ± 0.5 | (1.05, 0.95) — Área Blanca (requerimiento mínimo obligatorio) | ± 0.33 | (1.05, 0.95) — Tabla 3.3.2: Parámetros del Área Blanca o Requerimiento Mínimo para Centrales Eléctricas Síncronas y Asíncronas — Pmáx es la capacidad instalada neta tanto para Centrales Eléctricas síncronas y asíncronas. ” Translation: “ Grey Area limit (optional and non-limiting) | ± 0.5 | (1.05, 0.95) — White Area (mandatory minimum requirement) | ± 0.33 | (1.05, 0.95) — Table 3.3.2: Parameters of the White Area or Minimum Requirement for Synchronous and Asynchronous Power Plants — Pmáx is the net installed capacity for both synchronous and asynchronous Power Plants. ” (Resolución Núm. RES/550/2021 — Código de Red (Manual Regulatorio de Requerimientos Técnicos para la Interconexión de Centrales Eléctricas al SEN), accessed 2026-08-09)

Automatic Q/V control modes and response times Reactive capability Voltage-control setpoint range at least 0.95-1.05 pu with deadband 0 to ±1% of nominal voltage; reach 90% of setpoint in max 3 s and settle in max 5 s; steady-state error max 0.5% (direct voltage mode); reactive-power mode: steps no greater than 1 MVAr or 5% of maximum reactive power (whichever is smaller) Binds Centrales Eléctricas Asíncronas types B, C and D at the Punto de Interconexión. Three automatic control modes required (voltage control — direct or QV —, reactive-power control, power-factor control); CENACE picks the priority mode and sends setpoints remotely for types C and D (§3.5.3(i), §3.5.4). Slope (droop of the V-control) is defined by CENACE per plant. Storage applicability: generation-scoped rule; BESS = Central Eléctrica Asíncrona (power-electronics interconnection, Código de Red glossary C.1); SAE bound to the Código de Red by DACG A/113/2024 numeral 2.3 (DOF 7 Mar 2025). §3.5.3(ii), Manual Regulatorio de Requerimientos Técnicos para la Interconexión de Centrales Eléctricas al Sistema Eléctrico Nacional (Código de Red, RES/550/2021, DOF 31 Dec 2021, printed p. 1064) + Same Manual, §3.5.3(iv) — reactive-power control mode (Código de Red, RES/550/2021, DOF 31 Dec 2021, printed p. 1064)
The clauses this row cites

§3.5.3(ii), Manual Regulatorio de Requerimientos Técnicos para la Interconexión de Centrales Eléctricas al Sistema Eléctrico Nacional (Código de Red, RES/550/2021, DOF 31 Dec 2021, printed p. 1064) — “ En el modo de control de tensión directo, la Central Eléctrica Asíncrona tipo B, C o D debe contribuir al control automático de la tensión con un rango de consigna de tensión de al menos 0.95 a 1.05 pu, con una pendiente definida por el CENACE durante el desarrollo de los Estudios de Interconexión, o cuando el CENACE lo dictamine, con o sin una banda muerta con un rango de 0 a ± 1% de la tensión nominal de la Red Eléctrica. La Central Eléctrica debe alcanzar el 90% de la consigna en un tiempo máximo de 3 segundos, además de estabilizarse en el valor especificado en un tiempo máximo de 5 segundos, presentando pasos no mayores a 0.01 pu y un error en estado estable, máximo permisible de 0.5%. ” Translation: “ In direct voltage control mode, the type B, C or D Asynchronous Power Plant must contribute to the automatic control of voltage with a voltage setpoint range of at least 0.95 to 1.05 pu, with a slope defined by CENACE during the development of the Interconnection Studies, or when CENACE so determines, with or without a deadband with a range of 0 to ± 1% of the nominal voltage of the Electric Grid. The Power Plant must reach 90% of the setpoint within a maximum time of 3 seconds, and stabilize at the specified value within a maximum time of 5 seconds, presenting steps no greater than 0.01 pu and a maximum permissible steady-state error of 0.5%. ” (Resolución Núm. RES/550/2021 — Código de Red (Manual Regulatorio de Requerimientos Técnicos para la Interconexión de Centrales Eléctricas al SEN), accessed 2026-08-09)

Same Manual, §3.5.3(iv) — reactive-power control mode (Código de Red, RES/550/2021, DOF 31 Dec 2021, printed p. 1064) — “ A efectos del modo de control de potencia reactiva, la Central Eléctrica Asíncrona tipo B, C, o D debe alcanzar el 90% de la consigna solicitada por el CENACE en un tiempo máximo de 3 segundos, además de estabilizarse en el valor especificado en un tiempo máximo de 5 segundos con una configuración de pasos no mayores de 1 MVAr o 5% (lo que sea menor) de la potencia reactiva máxima ” Translation: “ For the purposes of the reactive-power control mode, the type B, C, or D Asynchronous Power Plant must reach 90% of the setpoint requested by CENACE within a maximum time of 3 seconds, and stabilize at the specified value within a maximum time of 5 seconds, with a step configuration no greater than 1 MVAr or 5% (whichever is smaller) of the maximum reactive power ” (Resolución Núm. RES/550/2021 — Código de Red (Manual Regulatorio de Requerimientos Técnicos para la Interconexión de Centrales Eléctricas al SEN), accessed 2026-08-09)

Primary frequency control (droop) Frequency response Droop (característica de regulación) selectable 3-8%; frequency-response deadband ±30 mHz; control insensitivity 0-15 mHz / 0-0.025%; max activation delay t1 = 2 s (synchronous) / < 2 s (asynchronous); max full-response time t2 = 30 s; active-power band 3-10% of Pref; Primary frequency Control mode operates within 59.8–60.2 Hz (SIN, SIBC, SIBCS) / 59.7–60.3 Hz (SIM); the separate high- and low-frequency response modes (§2.2.3, §2.2.4) activate beyond 60.2/59.8 Hz (SIN, SIBC, SIBCS) and 60.3/59.7 Hz (SIM) with the same 3–8 % droop and activation in less than 2 s §2.2 is written for type B plants but cascades to types C and D (§2.3 and §2.4 both open with 'Aplican los requerimientos de Interconexión para las Centrales Eléctricas tipo C, relativo al monitoreo en tiempo real del Control Primario y Secundario de frecuencia'). Parameters are set by CENACE within the Tabla 2.2.2.A ranges during interconnection and must remain configurable. Under-frequency response is limited by net installed capacity and real-time availability of the primary energy source (§2.2.4) — for a BESS that is the state of charge, which is an inference from the clause, not its wording — Criterio INTE-20 only requires SAE to declare their fuente primaria de almacenamiento from a listed taxonomy and says nothing about SOC limiting frequency response. No explicit sustain duration; §2.2.10 requires traversing the full regulation range in max 15 minutes. Storage applicability: generation-scoped rule; SAE bound via DACG A/113/2024 numeral 2.3 (DOF 7 Mar 2025) and registration of storage as Central Eléctrica (A/113/2024 considerando Vigésimo Primero). §2.2.2(iv), Manual Regulatorio de Requerimientos Técnicos para la Interconexión de Centrales Eléctricas al Sistema Eléctrico Nacional (Código de Red, RES/550/2021, DOF 31 Dec 2021, printed p. 1054) + Same Manual, Tabla 2.2.2.A 'Parámetros de respuesta de la potencia activa del Control Primario de frecuencia' (Código de Red, RES/550/2021, DOF 31 Dec 2021, printed p. 1054)
The clauses this row cites

§2.2.2(iv), Manual Regulatorio de Requerimientos Técnicos para la Interconexión de Centrales Eléctricas al Sistema Eléctrico Nacional (Código de Red, RES/550/2021, DOF 31 Dec 2021, printed p. 1054) — “ La Central Eléctrica debe operar en el modo de Control Primario de frecuencia dentro del rango de frecuencia de 59.8 Hz a 60.2 Hz para el SIN, SIBC y SIBCS y de 59.7 Hz a 60.3 Hz para el SIM con una característica de regulación seleccionable entre 3 % y 8 %. ” Translation: “ The Power Plant must operate in the Primary frequency Control mode within the frequency range of 59.8 Hz to 60.2 Hz for the SIN, SIBC and SIBCS, and 59.7 Hz to 60.3 Hz for the SIM, with a regulation characteristic (droop) selectable between 3 % and 8 %. ” (Resolución Núm. RES/550/2021 — Código de Red (Manual Regulatorio de Requerimientos Técnicos para la Interconexión de Centrales Eléctricas al SEN), accessed 2026-08-09)

Same Manual, Tabla 2.2.2.A 'Parámetros de respuesta de la potencia activa del Control Primario de frecuencia' (Código de Red, RES/550/2021, DOF 31 Dec 2021, printed p. 1054) — “ Intervalo de potencia activa en relación con la Pref | 3 – 10% — Insensibilidad propia del control de respuesta a la frecuencia | 0 – 15 mHz / 0 – 0.025% — Banda muerta de respuesta a la frecuencia | ±30 mHz — Característica de regulación | 3 – 8 % — Tiempo máximo (t1) de retardo a la respuesta (CE Síncronas) | 2 segundos — Tiempo máximo (t1) de retardo a la respuesta (CE Asíncronas) | < 2 segundos — Tiempo máximo de respuesta (t2) | 30 segundos — Tabla 2.2.2.A: Parámetros de respuesta de la potencia activa del Control Primario de frecuencia ” Translation: “ Active-power interval in relation to Pref | 3 – 10% — Inherent insensitivity of the frequency-response control | 0 – 15 mHz / 0 – 0.025% — Frequency-response deadband | ±30 mHz — Regulation characteristic (droop) | 3 – 8 % — Maximum delay time (t1) to the response (Synchronous PPs) | 2 seconds — Maximum delay time (t1) to the response (Asynchronous PPs) | < 2 seconds — Maximum response time (t2) | 30 seconds — Table 2.2.2.A: Active-power response parameters of the Primary frequency Control ” (Resolución Núm. RES/550/2021 — Código de Red (Manual Regulatorio de Requerimientos Técnicos para la Interconexión de Centrales Eléctricas al SEN), accessed 2026-08-09)

Continuous frequency and voltage bands Continuous operating range Frequency (SIN and SIBC): 58.8-61.2 Hz unlimited; 58.2-58.8 Hz and 61.2-61.8 Hz min 30 minutes; 57.0-58.2 Hz and 61.8-62.4 Hz min 15 minutes (cumulative minimum operating times; SIBCS/SIM upper band widens to 61.8-63.0 Hz for 15 minutes). Voltage (all systems): 0.95-1.05 pu unlimited; 0.90-0.95 pu and 1.05-1.10 pu min 30 minutes per event, at the Punto de Interconexión Tabla 2.1 binds 'todas las Centrales Eléctricas' for their whole service life; times are cumulative and independent per frequency band (§2.1(i)), and CENACE's over/under-frequency schemes must respect them. Tabla 3.1.1 binds types B, C and D; Voltage times are per event, and CENACE may shorten them for simultaneous overvoltage + underfrequency or undervoltage + overfrequency (§3.1.1(iii)). Wider ranges must not be limited if technically feasible. Storage applicability: generation-scoped rule ('todas las Centrales Eléctricas'); BESS = Central Eléctrica Asíncrona; SAE bound via DACG A/113/2024 numeral 2.3 (DOF 7 Mar 2025). The SIBCS/SIM upper band (61.8-63.0 Hz for 15 minutes) is stated in the SIBCS/SIM rows of the same Tabla 2.1, cited but not quoted — the quoted transcription covers only the SIN and SIBC rows. §2.1 and Tabla 2.1, Manual Regulatorio de Requerimientos Técnicos para la Interconexión de Centrales Eléctricas al Sistema Eléctrico Nacional (Código de Red, RES/550/2021, DOF 31 Dec 2021, printed pp. 1053-1054) + Same Manual, §3.1.1(i) and Tabla 3.1.1 (Código de Red, RES/550/2021, DOF 31 Dec 2021, printed p. 1059)
The clauses this row cites

§2.1 and Tabla 2.1, Manual Regulatorio de Requerimientos Técnicos para la Interconexión de Centrales Eléctricas al Sistema Eléctrico Nacional (Código de Red, RES/550/2021, DOF 31 Dec 2021, printed pp. 1053-1054) — “ Para cada área síncrona, todas las Centrales Eléctricas, durante su vida útil, deben permanecer en operación, sin desconectarse, dentro de los rangos de frecuencia y tiempos mínimos que se muestran en la Tabla 2.1. [Tabla 2.1, filas SIN y SIBC:] 61.8 Hz ≤ f < 62.4 Hz | 15 minutos — 61.2 Hz ≤ f < 61.8 Hz | 30 minutos — 58.8 Hz ≤ f < 61.2 Hz | Ilimitado — 58.2 Hz ≤ f < 58.8 Hz | 30 minutos — 57.0 Hz ≤ f < 58.2 Hz | 15 minutos ” Translation: “ For each synchronous area, all Power Plants, throughout their service life, must remain in operation, without disconnecting, within the frequency ranges and minimum times shown in Table 2.1. [Table 2.1, SIN and SIBC rows:] 61.8 Hz ≤ f < 62.4 Hz | 15 minutes — 61.2 Hz ≤ f < 61.8 Hz | 30 minutes — 58.8 Hz ≤ f < 61.2 Hz | Unlimited — 58.2 Hz ≤ f < 58.8 Hz | 30 minutes — 57.0 Hz ≤ f < 58.2 Hz | 15 minutes ” (Resolución Núm. RES/550/2021 — Código de Red (Manual Regulatorio de Requerimientos Técnicos para la Interconexión de Centrales Eléctricas al SEN), accessed 2026-08-09)

Same Manual, §3.1.1(i) and Tabla 3.1.1 (Código de Red, RES/550/2021, DOF 31 Dec 2021, printed p. 1059) — “ La Central Eléctrica debe mantenerse interconectada a la red y operar dentro de los rangos de tensión, en los tiempos, por evento, especificados en la Tabla 3.1.1; [Tabla 3.1.1:] 1.05 pu ≤ V ≤ 1.10 pu | 30 minutos — 0.95 pu ≤ V ≤ 1.05 pu | Ilimitado — 0.90 pu ≤ V ≤ 0.95 pu | 30 minutos — Tabla 3.1.1: Valores de operación sin desconectarse de la red para Centrales Eléctricas ” Translation: “ The Power Plant must remain interconnected to the grid and operate within the voltage ranges, for the times, per event, specified in Table 3.1.1; [Table 3.1.1:] 1.05 pu ≤ V ≤ 1.10 pu | 30 minutes — 0.95 pu ≤ V ≤ 1.05 pu | Unlimited — 0.90 pu ≤ V ≤ 0.95 pu | 30 minutes — Table 3.1.1: Values for operation without disconnecting from the grid for Power Plants ” (Resolución Núm. RES/550/2021 — Código de Red (Manual Regulatorio de Requerimientos Técnicos para la Interconexión de Centrales Eléctricas al SEN), accessed 2026-08-09)

Active-power ramp limits Ramp rate 10 % of Capacidad Instalada Neta per minute — maximum admissible power-increase ramp on automatic reconnection; operational up/down ramp limits are set per plant by CENACE during Validación de Requerimientos Técnicos (no general numeric limit in the code) The only numeric ramp in the Manual is the automatic-reconnection ramp (§2.2.8, type B, cascaded to C and D), conditioned on frequency 58.8-60.2 Hz and voltage within ±5% of nominal for at least 5 minutes. General operating ramp limits (both directions) exist as an obligation but their values are plant-specific, specified by CENACE considering the primary energy source (§6.2.3, type C, cascaded to D via §6.3). No separate charge/discharge ramp values for storage are stated anywhere in the Manual. Storage applicability: generation-scoped rule; SAE bound via DACG A/113/2024 numeral 2.3 (DOF 7 Mar 2025); a BESS in charge mode is not separately addressed by the Manual's ramp provisions. §2.2.8(i)(A)-(B), Manual Regulatorio de Requerimientos Técnicos para la Interconexión de Centrales Eléctricas al Sistema Eléctrico Nacional (Código de Red, RES/550/2021, DOF 31 Dec 2021, printed p. 1058) + Same Manual, §6.2.3(i) 'Tasas de cambio de la potencia activa para Centrales Eléctricas tipo C' (Código de Red, RES/550/2021, DOF 31 Dec 2021, printed p. 1072)
The clauses this row cites

§2.2.8(i)(A)-(B), Manual Regulatorio de Requerimientos Técnicos para la Interconexión de Centrales Eléctricas al Sistema Eléctrico Nacional (Código de Red, RES/550/2021, DOF 31 Dec 2021, printed p. 1058) — “ La Central Eléctrica podrá interconectarse automáticamente a la red bajo las siguientes condiciones: A. Frecuencia en el rango de 58.8 Hz a 60.2 Hz y tensión en el rango de ± 5 % del valor nominal al menos durante 5 minutos; y B. Una rampa admisible máxima de incremento de potencia de 10 % de la Capacidad Instalada Neta de la Central Eléctrica por minuto. ” Translation: “ The Power Plant may automatically interconnect to the grid under the following conditions: A. Frequency in the range of 58.8 Hz to 60.2 Hz and voltage in the range of ± 5 % of the nominal value for at least 5 minutes; and B. A maximum admissible power-increase ramp of 10 % of the Net Installed Capacity of the Power Plant per minute. ” (Resolución Núm. RES/550/2021 — Código de Red (Manual Regulatorio de Requerimientos Técnicos para la Interconexión de Centrales Eléctricas al SEN), accessed 2026-08-09)

Same Manual, §6.2.3(i) 'Tasas de cambio de la potencia activa para Centrales Eléctricas tipo C' (Código de Red, RES/550/2021, DOF 31 Dec 2021, printed p. 1072) — “ El CENACE debe especificar, los límites mínimos y máximos de las tasas de cambio de potencia activa (límites de rampa) tanto en dirección hacia arriba y hacia abajo para las Centrales Eléctricas, teniendo en cuenta las características específicas de la fuente primaria de energía, durante la Validación de Requerimientos Técnicos. ” Translation: “ CENACE must specify the minimum and maximum limits of the rates of change of active power (ramp limits) both in the upward and downward direction for Power Plants, taking into account the specific characteristics of the primary energy source, during the Validation of Technical Requirements. ” (Resolución Núm. RES/550/2021 — Código de Red (Manual Regulatorio de Requerimientos Técnicos para la Interconexión de Centrales Eléctricas al SEN), accessed 2026-08-09)

RoCoF ride-through RoCoF withstand Up to 2.5 Hz/s, measured in a 200 ms window Measured at the Punto de Interconexión; plants must remain interconnected and operating. Requirement may be adapted for a particular plant with satisfactory technological justification, and CENACE may request wider capability where economically and technically feasible (§2.2.1(ii)). Written in §2.2 (type B) and cascaded to types C and D via §2.3/§2.4. Storage applicability: generation-scoped rule — binds BESS as Central Eléctrica Asíncrona; SAE tied to the Código de Red by DACG A/113/2024 numeral 2.3 (DOF 7 Mar 2025). §2.2.1(i), Manual Regulatorio de Requerimientos Técnicos para la Interconexión de Centrales Eléctricas al Sistema Eléctrico Nacional (Código de Red, RES/550/2021, DOF 31 Dec 2021, printed p. 1054)
The clause this row cites

§2.2.1(i), Manual Regulatorio de Requerimientos Técnicos para la Interconexión de Centrales Eléctricas al Sistema Eléctrico Nacional (Código de Red, RES/550/2021, DOF 31 Dec 2021, printed p. 1054) — “ En relación con la variación de la frecuencia eléctrica en el Punto de Interconexión, las Centrales Eléctricas deberán mantenerse interconectadas a la Red Eléctrica y operando ante razones de cambio de la frecuencia respecto al tiempo (ROCOF, por sus siglas en inglés, abreviado de Rate of Change of Frequency) de hasta 2.5 Hz/s, medidas en una ventana de tiempo de 200 milisegundos. Este requerimiento se podrá adecuar en el caso de alguna Central Eléctrica particular que tecnológicamente lo justifique de manera satisfactoria ” Translation: “ In relation to the variation of the electrical frequency at the Point of Interconnection, Power Plants must remain interconnected to the Electric Grid and operating under rates of change of frequency with respect to time (ROCOF, abbreviated from Rate of Change of Frequency) of up to 2.5 Hz/s, measured in a 200-millisecond time window. This requirement may be adapted in the case of a particular Power Plant that technologically justifies it satisfactorily ” (Resolución Núm. RES/550/2021 — Código de Red (Manual Regulatorio de Requerimientos Técnicos para la Interconexión de Centrales Eléctricas al SEN), accessed 2026-08-09)

Dynamic fault-current contribution Fault-current injection No fixed reactive-current gain k: CENACE specifies per plant the transient active/reactive current contribution values, response times and accuracy; P-vs-Q priority during faults is assigned by CENACE — if active-power priority, it must be established no later than 0.25 s from fault inception; if reactive-power priority, active power must recover in less than 1 s Binds Centrales Eléctricas Asíncronas types B, C and D (§3.5.5, §3.5.7). Unlike EU-RfG national codes, the Manual sets no numeric k factor or dead-band for additional reactive current: fast voltage-support current for symmetrical (3-phase) and asymmetrical (1- or 2-phase) faults is required 'en caso de ser necesario' with values, response times and accuracy fixed by CENACE in the Estudios de Interconexión / Validación de Requerimientos Técnicos (§3.5.7). Minimum short-circuit capability: asynchronous plants interconnected above 69 kV must contribute at least the pre-fault current (referred to the reference power), synchronous more than 2× rated current (§4.1.4, printed p. 1067, PDF p. 232). Negative-sequence current injection is not quantified. Storage applicability: generation-scoped rule; BESS = Central Eléctrica Asíncrona; SAE bound via DACG A/113/2024 numeral 2.3 (DOF 7 Mar 2025). §3.5.5(i), Manual Regulatorio de Requerimientos Técnicos para la Interconexión de Centrales Eléctricas al Sistema Eléctrico Nacional (Código de Red, RES/550/2021, DOF 31 Dec 2021, printed p. 1064) + Same Manual, §3.5.7(ii) 'Respuesta de corriente ante fallas simétricas y asimétricas para Centrales Eléctricas Asíncronas tipo B, C y D' (Código de Red, RES/550/2021, DOF 31 Dec 2021, printed p. 1065)
The clauses this row cites

§3.5.5(i), Manual Regulatorio de Requerimientos Técnicos para la Interconexión de Centrales Eléctricas al Sistema Eléctrico Nacional (Código de Red, RES/550/2021, DOF 31 Dec 2021, printed p. 1064) — “ El CENACE especificará durante el desarrollo de los Estudios de Interconexión y se rectificará o ratificará en la Validación de Requerimientos Técnicos, si la contribución de potencia activa, potencia reactiva o una combinación de ambas, tiene prioridad durante fallas, no obstante, esta prioridad podrá ser ajustada a solicitud del CENACE. Si se da prioridad a la contribución de la potencia activa, esta disposición ha de establecerse a más tardar 0.25 segundos desde el inicio de la falla. Si se da prioridad a la contribución de la potencia Reactiva, la potencia activa deberá recuperarse en menos de 1 seg. ” Translation: “ CENACE will specify during the development of the Interconnection Studies, and will rectify or ratify in the Validation of Technical Requirements, whether the contribution of active power, reactive power or a combination of both has priority during faults; nevertheless, this priority may be adjusted at CENACE's request. If priority is given to the active-power contribution, this provision must be established no later than 0.25 seconds from the start of the fault. If priority is given to the Reactive-power contribution, the active power must recover in less than 1 sec. ” (Resolución Núm. RES/550/2021 — Código de Red (Manual Regulatorio de Requerimientos Técnicos para la Interconexión de Centrales Eléctricas al SEN), accessed 2026-08-09)

Same Manual, §3.5.7(ii) 'Respuesta de corriente ante fallas simétricas y asimétricas para Centrales Eléctricas Asíncronas tipo B, C y D' (Código de Red, RES/550/2021, DOF 31 Dec 2021, printed p. 1065) — “ Con base en los Estudios de Interconexión y en la Validación de Requerimientos Técnicos, el CENACE especificará: A. Los valores de tensión en los que la Central Eléctrica deberá de aportar, de manera transitoria, corriente activa, reactiva, o una combinación de ambas, cuando la tensión esté dentro de la Zona A mostrada en las figuras 4.1.1.B y 4.2.1.B; y B. Los tiempos de respuesta y la precisión de la corriente de falla transitoria. ” Translation: “ Based on the Interconnection Studies and the Validation of Technical Requirements, CENACE will specify: A. The voltage values at which the Power Plant must contribute, transiently, active current, reactive current, or a combination of both, when the voltage is within Zone A shown in figures 4.1.1.B and 4.2.1.B; and B. The response times and the accuracy of the transient fault current. ” (Resolución Núm. RES/550/2021 — Código de Red (Manual Regulatorio de Requerimientos Técnicos para la Interconexión de Centrales Eléctricas al SEN), accessed 2026-08-09)

Scope

Who does Mexico (Codigo de Red) bind, and since when?

Power plants interconnecting to the SEN (RNT or RGD). No date of effect is published here — grid codes are reissued, so check the current issue before relying on it.

These figures are a reading aid, not legal advice. Grid codes are reissued: verify against the current edition before you design to them.

Curve data last checked against the code on — 66 standards, 130 envelopes, published by bess.engineer under CC BY 4.0.

Questions

Questions this page answers about Mexico (Codigo de Red)

Does Mexico (Codigo de Red) require ride-through, or only that the plant does not trip?
Ride-through. Every envelope on this page is a performance duty the plant must meet, not a protection-setting no-trip boundary — they are different obligations. That is what these curves are; they are not everything Mexico (Codigo de Red) contains. The requirement sentence under each chart says which side of the curve is the compliant one.
Are the numbers on this page taken from Mexico (Codigo de Red) itself?
Yes. Every breakpoint is read from the code, and each envelope carries the clause it came from, quoted in full under its chart — so you can check the figure against the standard rather than cite it from this page.
Which events are charted for Mexico (Codigo de Red)?
Mexico (Codigo de Red) is charted here with 3 envelopes — low-voltage ride-through, high-voltage ride-through, frequency ride-through (LVRT, HVRT, FRT). Its steady-state voltage-band figure adds one more, drawn from the code's continuous-operating-range table rather than from a ride-through curve.
Related

Ride-through, in context.

An envelope is a compliance boundary; understanding why it exists is a different question. The ride-through and grid-forming entries cover the engineering, and the Engineering Foundations course builds it from the physics up.

Elsewhere in North America: Canada (Alberta AESO), Ontario (IESO Market Rules App. 4.2), Quebec (Hydro-Quebec D-2022-088), ERCOT (NOG 2.9.1), IEEE 1547-2018 Cat III, IEEE 2800-2022, and 9 more