Peru (COES PR-20, Anexo 1 Cap. 4) ride-through requirements
Low-voltage ride-through, Frequency ride-through for Peru. Every breakpoint below is read from the code itself, and where a point was taken off a published figure rather than stated in the clause, the section under that chart says so — a curve with no recorded source class.
What is the low-voltage ride-through envelope for Peru (COES PR-20, Anexo 1 Cap. 4)?
The plant must ride through for any voltage that stays on or above this envelope. The envelope holds 0 pu from t = 0 to 150 ms; then ramps linearly from 0 pu at 150 ms to 0.2 pu at 650 ms; then ramps linearly from 0.2 pu at 650 ms to 0.85 pu at 3 s; then ramps linearly from 0.85 pu at 3 s to 0.95 pu at 3 min; then 0.95 pu from 3 min 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. Check these points against the clause quoted below before relying on them.
| From | To | Voltage | Between the points |
|---|---|---|---|
| 0 | 150 ms | 0 pu | Held flat |
| 150 ms | 650 ms | 0 → 0.2 pu | Ramps linearly |
| 650 ms | 3 s | 0.2 → 0.85 pu | Ramps linearly |
| 3 s | 3 min | 0.85 → 0.95 pu | Ramps linearly |
| 3 min | no stated end | 0.95 pu | Held flat |
The clause this came from
Procedimiento Técnico del COES N° 20 (PR-20), Anexo 1, Capítulo 4, numeral 4.4.3 (viñeta 'Comportamiento Transitorio') y Figura 4.4 'Curva tensión-tiempo del sistema de protección de tensión por fase'; band from 4.4.6; extended to storage by 4.5.1. Aprobado por Res. Consejo Directivo Osinergmin N° 173-2024-OS/CD. The code defines a linear recovery ramp; the vertices are read from the clause and the chart draws the segment between them.
What is the frequency ride-through envelope for Peru (COES PR-20, Anexo 1 Cap. 4)?
The plant must ride through between the upper and lower bands. The upper (over-frequency) band holds 62 Hz from t = 0 to 30 s; then 61.6 Hz from 30 s to 30 min; then 60.6 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 10 s; then 57.8 Hz from 10 s to 30 s; then 58.4 Hz from 30 s to 30 min; then 59.4 Hz from 30 min onward — the last band the envelope defines, with no stated end time.
Check these points against the clause quoted below before relying on them.
Upper limit
| From | To | Frequency | Between the points |
|---|---|---|---|
| 0 | 30 s | 62 Hz | Held flat |
| 30 s | 30 min | 61.6 Hz | Held flat |
| 30 min | no stated end | 60.6 Hz | Held flat |
Lower limit
| From | To | Frequency | Between the points |
|---|---|---|---|
| 0 | 10 s | 57 Hz | Held flat |
| 10 s | 30 s | 57.8 Hz | Held flat |
| 30 s | 30 min | 58.4 Hz | Held flat |
| 30 min | no stated end | 59.4 Hz | Held flat |
The clause this came from
PR-20, Anexo 1, Capítulo 4, numeral 4.4.5 'Tolerancia ante variaciones de la frecuencia', Tabla 4.5 'Tolerancias de Frecuencia de la CGNC'. Res. Consejo Directivo Osinergmin N° 173-2024-OS/CD.
Who does Peru (COES PR-20, Anexo 1 Cap. 4) bind, and since when?
This code does not carry a short scope statement — read the clause quoted above for who it binds. 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.
Digitised operating parameters beyond ride-through — droop, reactive capability, operating ranges — are published for 36 of the 66 codes in this atlas, not yet for Peru (COES PR-20, Anexo 1 Cap. 4). That is a gap on this site, not a statement that Peru (COES PR-20, Anexo 1 Cap. 4) sets none — the atlas hub marks the codes that carry them.
Curve data last checked against the code on — 66 standards, 130 envelopes, published by bess.engineer under CC BY 4.0.
Questions this page answers about Peru (COES PR-20, Anexo 1 Cap. 4)
- Does Peru (COES PR-20, Anexo 1 Cap. 4) require ride-through, or only that the plant does not trip?
- Ride-through, for the envelopes on this page — that is what each of them is. It is not everything Peru (COES PR-20, Anexo 1 Cap. 4) contains: the clauses quoted under the charts also address when the plant may or must trip. The requirement sentence under each chart says which side of the curve is the compliant one.
- Are the numbers on this page taken from Peru (COES PR-20, Anexo 1 Cap. 4) itself?
- Every breakpoint is read from the code, and where a point was taken off a published figure rather than stated in the clause, the section under that chart says so — on this page that includes a curve with no recorded source class. The clause each curve came from is quoted under it.
- Which events are charted for Peru (COES PR-20, Anexo 1 Cap. 4)?
- Peru (COES PR-20, Anexo 1 Cap. 4) is charted here with 2 envelopes — low-voltage ride-through, frequency ride-through (LVRT, FRT). No high-voltage envelope is charted here — check Peru (COES PR-20, Anexo 1 Cap. 4) itself before concluding it sets none.
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 South America: Panama (Código de Redes Fotovoltaico 2017), Colombia (CREG 060/2019, red de 500 kV), Colombia (CREG 060/2019), Ecuador (ARCONEL-001/24 Código de Conexión), Argentina (CAMMESA PT-4 Anexo I, Fig. Ai.1), Argentina (CAMMESA PT-4), and 2 more