Last updated: 18 September 2026
Norms, licences and glossary
The Brazilian grid rules WattSteer follows, the licences of the data it uses, and the terms that appear on its screens, in operator's language.
Regulatory basis
WattSteer neither classifies curtailment nor computes compensation. It shows what ONS published and forecasts how much will be curtailed; the norms below define the terms in which that is said.
REN ANEEL 1.030/2022
ONS classifies every wind and solar curtailment under one reason: REL (external unavailability), CNF (electrical reliability), ENE (energy surplus) or PAR (access opinion). Under the general rule only REL is compensated.
In WattSteer: The reason shown is the one ONS published, per conjunto. WattSteer does not reclassify and does not assign a reason to individual plants.
NT-ONS DOP 0022/2025, §5.1.2
In an energy surplus, generation is reduced in this order: I. hydro without spilling; II. thermal dispatched out of merit order; III. hydro with spilling; IV. wind and solar, in proportion to availability.
In WattSteer: Mitigate checks every plan against this order and refuses a plan that would act outside category IV.
Lei 15.269/2025, art. 1º-B
Provides compensation to wind and solar plants for external unavailability and for electrical reliability, from 1 September 2023 until the provision came into force.
In WattSteer: Regulatory context. WattSteer does not compute this compensation.
Procedimentos de Rede (ONS)
The grid operation procedures in force, published by ONS.
In WattSteer: Reference for the operating instructions the evidence layer cites.
Official texts
Traceability
Every published forecast states the model artifact that produced it, the weather run it used, when it was published and the 5 MW per-subsystem threshold. On the Explain screen, the “Full JSON” link opens the API response the screen is showing, so any figure can be checked at its source.