Difference between revisions of "EMO:Constraints Grid"
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:The type of constraint that is binding: | :The type of constraint that is binding: | ||
*Circuit Equation - an equation constraint | *Circuit Equation - an equation constraint | ||
| − | * | + | *Limit limit - the maximum rating of a line (circuit) |
| + | *Base Risk Fast (or Sustained) - risk in a reserves region set by the region's base risk (currently 121 MW in the SI, not applicable in the NI) | ||
*Import Risk Fast (or Sustained) - risk in a reserves region set by a DC (HVDC) risk | *Import Risk Fast (or Sustained) - risk in a reserves region set by a DC (HVDC) risk | ||
| − | *Unit risk - | + | *Unit risk - risk in a reserves region set by an AC (generator) risk |
| − | *Max Gen Fast (or Sustained) - a unit providing reserves is constrained such that dispatched reserves plus dispatched generation equals maximum output in MW | + | *Max Gen+Rsv Fast (or Sustained) - a unit providing reserves is constrained such that dispatched reserves plus dispatched generation equals maximum output in MW |
| − | * | + | *PLSR Slope Fast (or Sustained) - a PLSR unit providing reserves is constrained such that dispatched reserves is a fixed factor of dispatched generation in MW |
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| − | : | + | :Entity |
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| − | : | + | :Name of the entity that is constrained |
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| − | : | + | :Formula |
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| − | : | + | :Constraint formula (equation constraints only) |
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| − | : | + | :Limit |
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| − | : | + | :Right hand side limit value of a constraint (equation constraints only) |
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| − | : | + | :Price Separation |
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| − | : | + | :The cost that the constraint imposes on the dispatch in dollars per MWh (a.k.a. Lagrange multiplier) |
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| − | : | + | :Adjustment |
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| − | : | + | :The magnitude of any adjustment to a constraint limit required to allow EMO to find a feasible solution to an optimal dispatch - usually equal to zero |
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Latest revision as of 14:03, 13 February 2014
A tab for the Constraints grid appears in the data type selector panel at the top of the display area for Scenarios and Forecasts. The grid shows all constraints that are binding in the optimal dispatch solve, and provides information for understanding what is driving price and dispatch in any particular solve. The column data is described in the following table.
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