Class Description
Typically provided by RTO systems, constraints identified in both base case and critical contingency cases have to be transferred.
A constraint has N (>=1) constraint terms. A term is represented by an instance of TerminalConstraintTerm.
The constraint expression is:
minValue <= c1x1 + c2x2 + …. cn*xn + k <= maxValue
where:
- cn is ConstraintTerm.factor
- xn is the flow at the terminal
Flow into the associated equipment is positive for the purpose of ConnectivityNode NodeConstraintTerm.
k is SecurityConstraintsLinear.resourceMW.
The units of k are assumed to be same as the units of the flows, xn. The constants, cn, are dimensionless.
With these conventions, cn and k are all positive for a typical constraint such as “weighted sum of generation shall be less than limit”. Furthermore, cn are all 1.0 for a case such as “interface flow shall be less than limit”, assuming the terminals are chosen on the importing side of the interface.
Attributes
None
Relationships
Inherits from
Descendant classes
- No descendant classes
Leaf/Root class
| IsLeaf | IsRoot |
|---|---|
| False | False |
Associations
| Source Class | Cardinality Source | Target Class | Cardinality Target | Source Name | Source Assoc. Description | Target Name | Target Assoc. Description |
|---|---|---|---|---|---|---|---|
| ContingencyConstraintLimit | 0..* | SecurityConstraintSum | 1 | ContingencyConstraintLimits | SecurityConstraintSum | ||
| DefaultConstraintLimit | 0..1 | SecurityConstraintSum | 1 | DefaultConstraintLimit | SecurityConstraintSum | ||
| BaseCaseConstraintLimit | 0..1 | SecurityConstraintSum | 1 | BaseCaseConstraintLimit | SecurityConstraintSum | ||
| SecurityConstraintSum | 1 | ConstraintTerm | 0..* | SecurityConstraintSum | ConstraintTerms | ||
| SecurityConstraintSum | 0..* | RTO | 0..1 | SecurityConstraintsLinear | RTO |