Entry · Market
ACR: Regulated contracting environment
How do distribution utilities buy energy through public tenders?
Acronyms: CCEE, Electric Energy Trading Chamber; ACL, Free Contracting Environment; EPE, Energy Research Office.
In one sentence
Market segment in which selling agents and distribution utilities buy and sell energy through public tenders, according to specific trading rules and procedures.
Real example
In Aug 2026, the consumption accounted by the CCEE in the Distributor agent class, which the observatory reads as ACR, was 41,376 MWavgNature of the data: Calculated; in the ACL classes, without exports, 31,220 MWavgNature of the data: Calculated.
No Check this number record of its own in this example: the number comes from the panel's published database, which carries the source and the reference date.
Calculated: Deterministic transformation made by Scrutiniums, with a published formula.
Why it matters
How it is measured
In the observatory, through the consumption accounted by the CCEE in the Distributor agent class, in average MW, alongside the ACL; at the EPE, through captive consumption on the grid, in MWh. Shares always as a ratio of sums in energy.
Unit: average MW (consumption accounted by the CCEE) or MWh (captive consumption on the grid, EPE)
Not to be confused with
ACL (Free contracting environment)
In the ACR, selling agents and distribution utilities negotiate through public tenders; in the ACL, contracts are bilateral and freely negotiated. In the panels, each environment appears in two universes (consumption accounted by the CCEE and consumption on the grid from the EPE), which are not mixed.
What cannot be concluded
- The consumption accounted by the CCEE, according to the CCEE's own dataset description, is referred to the center of gravity of the submarket: it is not the consumption billed by distribution utilities nor the EPE captive consumption, which have other perimeters.
Related entries
See in the panel
Official source
Presidency of the RepublicDecree No. 5.163 of Jul 30, 2004, art. 1, § 2, item I (consolidated text, wording in force on Oct 6, 2026)
In other words: in the ACR, energy sellers and distribution utilities negotiate through public tenders, except for the exceptions provided for by law.
Literal excerpt from the document
Portuguese only“I - Ambiente de Contratação Regulada - ACR o segmento do mercado no qual se realizam as operações de compra e venda de energia elétrica entre agentes vendedores e agentes de distribuição, precedidas de licitação, ressalvados os casos previstos em lei, conforme regras e procedimentos de comercialização específicos;”
Presidency of the RepublicDecree No. 5.163 of Jul 30, 2004, art. 2, item II (consolidated text, wording in force on Oct 6, 2026)
In other words: the distribution utility needs contracts registered with the CCEE for one hundred percent of the market it serves.
Literal excerpt from the document
Portuguese only“II - os agentes de distribuição deverão garantir o atendimento a cem por cento de seus mercados de energia por intermédio de contratos registrados na Câmara de Comercialização de Energia Elétrica - CCEE e, quando for o caso, aprovados, homologados ou registrados pela ANEEL;”
Documents accessed and text checked on Oct 6, 2026.