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  1. Wholesale category / Datasets
  2. Final pricing
  3. Binding and near-binding constraints

Wholesale datasets

Binding and near-binding constraints

Binding and near-binding constraints are extracted from final pricing SPD case files and published here daily. The records with a non-zero shadow price, i.e. the column called MarginalDollarsPerMegawatt, are the binding constraints. Records with a zero shadow price are the near-binding constraints, specifically those constraints where the left-hand side evaluates to be within 5% or 5MW of the right-hand side.

The left-hand side of a constraint can be comprised of multiple components, each shown in a separate row of the file. Each component of a constraint is given a name - see the column called ComponentName - and the set of components belonging to a single constraint can be observed by identifying all rows with a unique ConstraintName-ConstraintType-TradingDate-TradingPeriod-ComponentType tuple. The left-hand side of a constraint can be evaluated by summing the product of ComponentCoefficient and ComponentMegawatts for each component and will yield the value given by LeftHandSideMegawatts.

The P, I, and F suffix in the file name denotes whether the SPD case file is associated with provisional, interim, or final prices, respectively. Once final prices are published and the F suffix is appended to the file name, all other constraint files for that day will be removed.

Name Date modified File size
2021
01 Dec 2021
2019
08 Oct 2021
2009-2021
05 Apr 2021
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Datasets are collections of files that often contain large volumes of data and are available for immediate download. Dataset users are typically analysts familiar with the electricity industry and have a need to obtain a large set of data or specific data on a regular basis.

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