Sistema Interligado Nacional / CCEE short-term market (Brazil)

Brazil. Status: operational.

Wholesale design: Physical dispatch is centrally optimized by ONS using audited costs and system models. CCEE registers bilateral and regulated contracts and financially settles measured-versus-contracted differences at the model-derived PLD by submarket and hour.

Operator
ONS; CCEE
Pricing granularity
zonal
Settlement interval
60 minutes
Nominal frequency
60 Hz
What a battery can sell

What ancillary services can a battery sell in Sistema Interligado Nacional / CCEE short-term market (Brazil)?

Sistema Interligado Nacional / CCEE short-term market (Brazil) has 6 ancillary-service products, across 6 families — frequency containment, automatic frequency restoration, operating reserve, reactive power & voltage, black start & restoration and emergency control: Autorrestabelecimento Integral ou Parcial, Reserva de Potência Operativa / Despacho Complementar para Manutenção da Reserva, Controle Primário de Frequência, Suporte de Reativos, Controle Secundário de Frequência, Sistema Especial de Proteção. Response timing, direction and eligibility for each are in the cards below, as the official sources state them.

Facts below are stated as the official sources state them. A missing line means the source does not state that value — never that the value is zero.

Frequency containment

  • Controle Primário de Frequência CPF

    operational

    Locally and automatically contain frequency deviations following generation-load imbalance.

    Direction
    symmetric
    Stated response
    Unit/control-specific under ONS technical procedures
    Trigger / range
    Frequency deviation and unit governor/control settings under ONS procedures.
    Eligibility
    Generating units meeting ONS technical requirements.
    Typical procurement
    ONS-determined operational need
    Pricing
    Mandatory/regulated provision and applicable ancillary-service cost recovery

Automatic frequency restoration

  • Controle Secundário de Frequência CSF/CAG

    operational

    Centrally restore frequency and interchange using automatic generation control.

    Direction
    symmetric
    Stated response
    Plant- and control-area-specific under ONS procedures
    Trigger / range
    ONS automatic-generation-control signal.
    Eligibility
    ONS-qualified units and control areas.
    Typical procurement
    ONS-determined operational need
    Pricing
    Regulated ancillary-service treatment

Operating reserve

  • Reserva de Potência Operativa / Despacho Complementar para Manutenção da Reserva RPO/Despacho Complementar

    operational

    Maintain sufficient operational power reserve through synchronized and additional dispatchable resources.

    Direction
    up
    Stated response
    Operationally specified by ONS; no universal value asserted
    Trigger / range
    ONS dispatch and reserve criteria.
    Eligibility
    ONS-dispatchable generation and qualifying resources.
    Typical procurement
    Reliability-study and dispatch-specific
    Pricing
    Regulated incremental-cost/ancillary-service remuneration where applicable

Reactive power & voltage

  • Suporte de Reativos

    operational

    Provide reactive power and voltage support at locations required for secure operation.

    Direction
    non-directional
    Stated response
    Equipment- and instruction-specific
    Sustain
    Continuous or as instructed
    Trigger / range
    Voltage setpoints and ONS instruction.
    Eligibility
    Qualified generators and reactive compensation equipment.
    Typical procurement
    Location- and study-specific
    Pricing
    Regulated ancillary-service remuneration

Black start & restoration

  • Autorrestabelecimento Integral ou Parcial

    operational

    Start and restore generating capability without external supply, supporting system restoration.

    Stated response
    Facility- and restoration-plan-specific
    Sustain
    Restoration-plan-specific
    Trigger / range
    Blackout/restoration plan.
    Eligibility
    Facilities certified for full or partial self-restoration.
    Typical procurement
    Restoration-plan-specific
    Pricing
    Regulated ancillary-service remuneration

Emergency control

  • Sistema Especial de Proteção SEP

    operational

    Execute automatic remedial actions following defined system conditions or contingencies.

    Direction
    non-directional
    Stated response
    Scheme-specific
    Sustain
    Scheme-specific
    Trigger / range
    Scheme-specific protection logic.
    Eligibility
    Configured protection and control schemes.
    Typical procurement
    Study-specific
    Pricing
    Regulated treatment
Getting paid to exist

Does Sistema Interligado Nacional / CCEE short-term market (Brazil) have a capacity mechanism?

Sistema Interligado Nacional / CCEE short-term market (Brazil) has 1 capacity/adequacy arrangement: Leilão de Reserva de Capacidade na forma de Potência. The official sources do not say whether it is a central capacity market. Responsibility sits with MME / ANEEL / CCEE.

Leilão de Reserva de Capacidade na forma de Potência

operational periodic auctions

Central procurement of power availability through capacity-reserve contracts. The planned 2025 auction was cancelled; new auctions cleared in 2026.

auction pay as bid

Responsibility
MME / ANEEL / CCEE
Unit of obligation
MW of contracted availability/power reserve
Auction held in 2025
No — The 2025 process was cancelled or produced no held auction.
Where this comes from

Official sources

Rules

Market explainer

Capacity-mechanism explainer

Capacity result

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

Questions

Common questions about Sistema Interligado Nacional / CCEE short-term market (Brazil)

Who operates Sistema Interligado Nacional / CCEE short-term market (Brazil)?
Sistema Interligado Nacional / CCEE short-term market (Brazil) covers Brazil and is operated by ONS; CCEE.
Was a qualifying capacity event held in Sistema Interligado Nacional / CCEE short-term market (Brazil) in 2025?
No. Leilão de Reserva de Capacidade na forma de Potência: no qualifying 2025 event is recorded. The 2025 process was cancelled or produced no held auction.
How is energy traded, priced and settled in Sistema Interligado Nacional / CCEE short-term market (Brazil)?
Sistema Interligado Nacional / CCEE short-term market (Brazil): Physical dispatch is centrally optimized by ONS using audited costs and system models. CCEE registers bilateral and regulated contracts and financially settles measured-versus-contracted differences at the model-derived PLD by submarket and hour. pricing granularity — zonal; settlement interval — 60 minutes.
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