Entry · Operation
Global load (verified load)
How much energy does the system serve every half hour?
Acronyms: ONS, National Electric System Operator; CCEE, Electric Energy Trading Chamber; SIN, National Interconnected System.
In one sentence
Load verified by the ONS every half hour by load area, with the published components: the portion supervised by the ONS, the portion measured by the CCEE, the portion served by distributed micro and mini generation and, when they occur, demand reduction and consistency adjustments.
Real example
10.8%Portuguese onlyda carga globalNature of the data: Estimated
Aug 1, 2026 to Aug 31, 2026 · SIN
Source: ONS, Carga de Energia Verificada. Reference up to Aug 31, 2026. Captured on Sep 30, 2026.
How much of the SIN global load was served by distributed micro and mini generation in the last complete month, according to the ONS estimate.
Estimated: Value obtained by a statistical procedure, with uncertainty.
Why it matters
How it is measured
In MWavg integrated at the end of each half hour (UTC time), by load area.
Unit: MWavg, by half hour and load area
Not to be confused with
Global load includes the portion served by distributed micro and mini generation; load net of MMGD is global load without that portion. In the published data, net load plus the MMGD portion gives the global load in all half hours checked.
They are different quantities: global load, by half hour and load area, is above the hourly load curve in the same hours. That is why load net of MMGD is not obtained by subtracting MMGD from the curve.
What cannot be concluded
- The MMGD portion is an ONS estimate, not a measurement; global load is therefore observed with an estimated component.
- It is not the same quantity as the hourly load curve: in the published data, the global load of the SIN is above the curve in the same hours (MMGD and hourly profile panel, Audit mode).
Related entries
Official source
Literal excerpt from the document
Portuguese only“Dados de carga verificada na periodicidade semi-horária por área de carga e suas componentes de parcela supervisionada pelo ONS, parcela proveniente dos dados de medição (geração tipo I, IIA, IIB, IIC e intercâmbios), parcela proveniente do sistema de medição para faturamento da CCEE (geração tipo III), parcela atendida por micro e mini geração distribuída (MMGD), parcela atendida por redução de demanda, e os valores das consistências feitas para os modelos de previsão, quando ocorrerem.”
Literal excerpt from the document
Portuguese only“Valor da Carga Global em MWmed integralizada no final do intervalo da semi-hora”
Documents accessed and text checked on Oct 1, 2026.