Sistema Eléctrico Nacional (Chile)

Chile. Status: operational.

Wholesale design: Centralized least-cost dispatch and hourly marginal-cost spot settlement coexist with bilateral supply contracts; the spot market settles generator injections and withdrawals at marginal node prices.

Operator
Coordinador Eléctrico Nacional
Pricing granularity
nodal
Settlement interval
60 minutes
Nominal frequency
50 Hz
What a battery can sell

What ancillary services can a battery sell in Sistema Eléctrico Nacional (Chile)?

Sistema Eléctrico Nacional (Chile) has 12 ancillary-service products, across 8 families — frequency containment, fast frequency response, automatic frequency restoration, manual frequency restoration, reactive power & voltage, black start & restoration, emergency control and demand response: Control de Contingencias, Control Primario de Frecuencia por Sobrefrecuencia, Control Primario de Frecuencia por Subfrecuencia, Control Rápido de Frecuencia por Sobrefrecuencia, Control Rápido de Frecuencia por Subfrecuencia, Control Secundario de Frecuencia por Sobrefrecuencia, Control Secundario de Frecuencia por Subfrecuencia, Control Terciario de Frecuencia por Sobrefrecuencia, and 4 more. Response timing, direction and eligibility for each are in the table below; a product's full record lists the official sources behind it.

Every value below comes from the official sources listed in that product's full record. Most products cite more than one, and the published sources do not say which of them states each individual value, so the binding is to the product's record rather than to a single document. A missing line means the source does not state that value — never that the value is zero.

Scroll the table sideways for the rest of the columns →

12 ancillary-service products in Sistema Eléctrico Nacional (Chile), grouped into 8 families. Each row runs left to right through one product's life: how it activates, how quickly it has to respond, how long it has to keep delivering, and how it is bought.
Service How it activates Response Sustained delivery Procurement
Frequency containment
Control Primario de Frecuencia por Sobrefrecuencia CPF- down operational Response type continuous; post-fault; automatic local Trigger Normal-operation band is 50 ±0.2 Hz; important contingencies exceed ±0.2 Hz. Resource-specific deadbands and settings apply. Response starts 2 s Full activation 10 s As the source describes it at least 5 min; Minimum delivery 5 minutes; no universal maximum stated Varies 24–85 MW (2025) Source wording: CPF- @5min absolute reserve for gross generation scenarios; normal-state requirement is ±50 MW Official table displays downward quantities as -24 to -85 MW. Bought Operational ancillary-service auctions Through pay-as-bid auction; co-optimised with the energy market Pricing design Wear-cost offers subject to caps; opportunity costs and incremental costs settled ex post
Full record for Control Primario de Frecuencia por Sobrefrecuencia — document bound, page for these figures not recorded
What it is for

Contain and correct frequency deviations, including overfrequency contingencies.

What the source says about timing

Initial controller delay below 2 seconds; full service activation within 10 seconds

Who can provide it

Verified synchronous generation, wind, solar and storage resources.

Checkpoint recap

Response starts 2 s · Full activation 10 s · Minimum sustained 5 min

Sources
Control Primario de Frecuencia por Subfrecuencia CPF+ up operational Response type continuous; post-fault; automatic local Trigger Normal-operation band is 50 ±0.2 Hz; important contingencies exceed ±0.2 Hz. Some active-energy compensators use ±0.3 Hz activation, but this is resource-specific. Response starts 2 s Full activation 10 s As the source describes it at least 5 min; Minimum delivery 5 minutes; no universal maximum stated Varies 22–331 MW (2025) Source wording: CPF+ @10s varies with system gross generation, inertia and a 300–400 MW contingency; normal-state requirement is ±50 MW Table 5-3 through 5-5 scenarios. Five-minute CPF+ range is 135–307 MW. Bought Operational ancillary-service auctions from February 2026 and dispatch co-optimization Through pay-as-bid auction; co-optimised with the energy market Pricing design Cost offers subject to caps plus ex-post opportunity and incremental costs
Full record for Control Primario de Frecuencia por Subfrecuencia — document bound, page for these figures not recorded
What it is for

Contain and correct frequency deviations, including underfrequency contingencies.

What the source says about timing

Initial controller delay below 2 seconds; contingency contribution delivered within first 10 seconds

Who can provide it

Verified synchronous generation, wind, solar, storage and other qualifying installations.

Checkpoint recap

Response starts 2 s · Full activation 10 s · Minimum sustained 5 min

Sources
Fast frequency response
Control Rápido de Frecuencia por Sobrefrecuencia CRF- down Defined, but not required in 2026 Response type post-fault; automatic local Trigger Event-triggered; the definition does not prescribe one universal threshold for every resource. Full activation 1 s As the source describes it at least 5 min; Minimum delivery 5 minutes; no universal maximum stated Not procured No technical need identified for 2026 Bought Not required for calendar 2026 Pricing design Not procured in 2026
Full record for Control Rápido de Frecuencia por Sobrefrecuencia — document bound, page for these figures not recorded
What it is for

Rapidly respond to overfrequency deviations and contingencies.

What the source says about timing

Full activation within 1 second

Who can provide it

Verified generation, storage and other capable facilities under the technical standard.

Checkpoint recap

Full activation 1 s · Minimum sustained 5 min

Sources
Control Rápido de Frecuencia por Subfrecuencia CRF+ up Defined, but not required in 2026 Response type post-fault; automatic local Trigger Event-triggered; the definition does not prescribe one universal threshold for every resource. Full activation 1 s As the source describes it at least 5 min; Minimum delivery 5 minutes; no universal maximum stated Not procured No technical need identified for 2026 Bought Not required for calendar 2026 Pricing design Not procured in 2026
Full record for Control Rápido de Frecuencia por Subfrecuencia — document bound, page for these figures not recorded
What it is for

Rapidly respond to underfrequency deviations and contingencies.

What the source says about timing

Full activation within 1 second

Who can provide it

Verified generation, storage and other capable facilities under the technical standard.

Checkpoint recap

Full activation 1 s · Minimum sustained 5 min

Sources
Automatic frequency restoration
Control Secundario de Frecuencia por Sobrefrecuencia CSF- down operational Response type continuous; automatic central Trigger AGC centralized control; requirement covers intrahour variation, minimum AGC reserve and five-minute ramps. Full activation 5 min As the source describes it at least 15 min; Minimum delivery 15 minutes; no universal maximum stated Varies 120–322 MW (2025) Source wording: Absolute seasonal, day-type and time-block CSF- requirement Table 5-8 displays downward quantities as negative. Bought Operational ancillary-service auctions and dispatch co-optimization Through pay-as-bid auction; co-optimised with the energy market Pricing design Wear-cost offer plus ex-post opportunity and incremental costs
Full record for Control Secundario de Frecuencia por Sobrefrecuencia — document bound, page for these figures not recorded
What it is for

Automatically restore system frequency to nominal and manage intrahour net-demand variations through AGC.

What the source says about timing

Full activation within 5 minutes

Who can provide it

AGC-qualified synchronous generation, wind, solar and storage.

Checkpoint recap

Full activation 5 min · Minimum sustained 15 min

Sources
Control Secundario de Frecuencia por Subfrecuencia CSF+ up operational Response type continuous; automatic central Trigger AGC centralized control; requirement covers intrahour variation, minimum AGC reserve and five-minute ramps. Full activation 5 min As the source describes it at least 15 min; Minimum delivery 15 minutes; no universal maximum stated Varies 132–323 MW (2025) Source wording: Seasonal, day-type and time-block CSF+ requirement Table 5-8. Bought Operational ancillary-service auctions and dispatch co-optimization Through pay-as-bid auction; co-optimised with the energy market Pricing design Wear-cost offer plus ex-post opportunity and incremental costs
Full record for Control Secundario de Frecuencia por Subfrecuencia — document bound, page for these figures not recorded
What it is for

Automatically restore system frequency to nominal and manage intrahour net-demand variations through AGC.

What the source says about timing

Full activation within 5 minutes

Who can provide it

AGC-qualified synchronous generation, wind, solar and storage.

Checkpoint recap

Full activation 5 min · Minimum sustained 15 min

Sources
Manual frequency restoration
Control Terciario de Frecuencia por Sobrefrecuencia CTF- down operational Response type manual Trigger Activated by real-time instruction from the Coordinator. Response starts 5 min Full activation 15 min Maximum stated up to 1 h; Maximum delivery 1 hour Varies 94–633 MW (2025) Source wording: Absolute seasonal, day-type and time-block CTF- requirement Table 5-10 displays downward quantities as negative. Bought Operational ancillary-service auctions and dispatch co-optimization Through pay-as-bid auction; co-optimised with the energy market Pricing design Wear-cost offer plus ex-post opportunity and incremental costs
Full record for Control Terciario de Frecuencia por Sobrefrecuencia — document bound, page for these figures not recorded
What it is for

Restore secondary-frequency-control reserves or add reserve when faster categories are insufficient.

What the source says about timing

Activation starts within 5 minutes and reaches full delivery within 15 minutes

Who can provide it

Verified generation, wind, solar, storage and eligible free customers/aggregators.

Checkpoint recap

Response starts 5 min · Full activation 15 min · Maximum sustained 1 h

Sources
Control Terciario de Frecuencia por Subfrecuencia CTF+ up operational Response type manual Trigger Activated by real-time instruction from the Coordinator. Response starts 5 min Full activation 15 min Maximum stated up to 1 h; Maximum delivery 1 hour Varies 76–625 MW (2025) Source wording: Seasonal, day-type and time-block CTF+ requirement Table 5-10. Bought Operational ancillary-service auctions and dispatch co-optimization Through pay-as-bid auction; co-optimised with the energy market Pricing design Wear-cost offer plus ex-post opportunity and incremental costs
Full record for Control Terciario de Frecuencia por Subfrecuencia — document bound, page for these figures not recorded
What it is for

Restore secondary-frequency-control reserves or add reserve when faster categories are insufficient.

What the source says about timing

Activation starts within 5 minutes and reaches full delivery within 15 minutes

Who can provide it

Verified generation, wind, solar, storage and eligible free customers/aggregators.

Checkpoint recap

Response starts 5 min · Full activation 15 min · Maximum sustained 1 h

Sources
Reactive power & voltage
Control de Tensión CT non-directional operational Response type continuous; automatic local; manual Trigger Local voltage-control setpoints and system-study requirements. Stated response Equipment- and study-specific As the source describes it Continuous or as instructed; no single duration As stated Local reactive-power requirements by control area and short-circuit-strength requirements by connection bus The 2026 report gives local MVAr and MVA requirements; do not collapse them into MW. Bought Direct instruction for operating resources; competitive tenders may be used for new infrastructure Through administrative assignment; competitive tender Pricing design Regulated service remuneration and tender award terms
Full record for Control de Tensión — document bound, page for these figures not recorded
What it is for

Maintain bus voltages and provide reactive power, dynamic voltage support and short-circuit strength where required.

Who can provide it

Synchronous generators, inverter-based resources, synchronous condensers, SVC/STATCOM and reactive compensation equipment.

Sources
Black start & restoration
Plan de Recuperación de Servicio PA/AR/EV operational Response type post-fault; manual; event-triggered Trigger Partial or total blackout and restoration-plan instruction. Stated response Facility- and restoration-plan-specific As the source describes it Restoration-plan-specific As stated Facility- and zone-specific requirements for autonomous start, rapid islanding and interconnection equipment The 2026 report identifies participating installations rather than one system-wide MW procurement quantity. Bought Annual service plan and direct instruction; competitive tenders may be used if new infrastructure is required and multiple suppliers are available Through administrative assignment; competitive tender Pricing design Regulated ancillary-service remuneration or tender award terms for new infrastructure
Full record for Plan de Recuperación de Servicio — document bound, page for these figures not recorded
What it is for

Restore supply following partial or total blackout through autonomous start, rapid islanding and interconnection equipment.

Who can provide it

Verified black-start generation or storage, islanding-capable facilities and switching/interconnection equipment.

Sources
Emergency control
Control de Contingencias EDAC/DMC/EDAG/ERAG/PDC non-directional operational Response type post-fault; automatic local; manual; event-triggered Trigger Scheme-specific frequency, voltage or contingency logic; for the 2026 EDAC underfrequency plan, the first published stage is 48.9 Hz. Stated response Protection- or instruction-specific As the source describes it Scheme-specific As stated Scheme-specific staged requirements; the 2026 EDAC-BF table totals 25% of load, or 1,883–3,132 MW across six stages The range is load-scenario dependent and is not a single centrally procured MW target. Bought As required by security studies and operating plans Through administrative assignment Pricing design Direct instruction / regulated treatment
Full record for Control de Contingencias — document bound, page for these figures not recorded
What it is for

Automatically or manually disconnect load/generation and execute defence plans to arrest critical or extreme contingencies.

Who can provide it

Configured loads, generating resources and system protection schemes.

Sources
Demand response
Cargas Interrumpibles CI up Defined, but not required in 2026 Response type manual Trigger Activated by Coordinator instruction. Full activation 30 min As the source describes it at least 2 h; Minimum delivery 2 hours; no universal maximum stated Not procured Not required for 2026 The 2026 complementary-services report identified no requirement. Bought Not required in 2026; competitive tender if a future adequacy/security study identifies a requirement Through competitive tender Pricing design No 2026 procurement; tender terms would apply when required
Full record for Cargas Interrumpibles — document bound, page for these figures not recorded
What it is for

Reduce free-customer demand during high-load/low-generation conditions, congestion or system emergencies.

What the source says about timing

Full activation within 30 minutes

Who can provide it

Free customers individually or through aggregators.

Checkpoint recap

Full activation 30 min · Minimum sustained 2 h

Sources
Getting paid to exist

Does Sistema Eléctrico Nacional (Chile) have a capacity mechanism?

Sistema Eléctrico Nacional (Chile) has 1 capacity/adequacy arrangement: Potencia de Suficiencia. The official sources do not say whether it is a central capacity market. Responsibility sits with Coordinador Eléctrico Nacional / CNE.

Potencia de Suficiencia

operational

Administered remuneration for recognized firm/sufficiency power. It is not a centralized capacity auction.

administrative assignment

Responsibility
Coordinador Eléctrico Nacional / CNE
Unit of obligation
MW of recognized sufficiency capacity
Auction held in 2025
No — No capacity auction for this market was found to have been held during 2025 in the sources reviewed.
Where this comes from

Official sources

Market explainer

Capacity-mechanism explainer

Current as of · from the Global Electricity Market Catalogue v1.2.0 (compiled to , CC BY 4.0, rendered here with wording edited for readability). Facts belong to the linked official authorities; verify the current rules before design or bidding decisions.

Questions

Common questions about Sistema Eléctrico Nacional (Chile)

Who operates Sistema Eléctrico Nacional (Chile)?
Coordinador Eléctrico Nacional operates Sistema Eléctrico Nacional (Chile), covering Chile.
Was a qualifying capacity event held in Sistema Eléctrico Nacional (Chile) in 2025?
No. Potencia de Suficiencia: no qualifying 2025 event is recorded. No capacity auction for this market was found to have been held during 2025 in the sources reviewed.
How is energy traded, priced and settled in Sistema Eléctrico Nacional (Chile)?
Sistema Eléctrico Nacional (Chile): Centralized least-cost dispatch and hourly marginal-cost spot settlement coexist with bilateral supply contracts; the spot market settles generator injections and withdrawals at marginal node prices. Pricing granularity — nodal; settlement interval — 60 minutes.
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