Constraint Equation Details
Summary
The Constraint Equation Details view shows the details of the selected Constraint Equation.
Image
Description
The Constraint Equation Details view show details about a constraint equation. The screen shows both current dispatch/pre-dispatch information related to the invocation of the constraint as well as more general constraint equation details.
The screen features two top level sections represented as tabs: Overview and Plain English Translation.
The very top centre of the screen displays information about the constraint equation for the current dispatch interval shown below and to the right of this. The information shown here is the current LHS value, logical operator for the constraint equation, RHS value, Marginal Value, Violation Degree, Headroom and Maximum Marginal Value in Pre-Dispatch.
Overview
The top of this section contains the current invocation data for the constraint with a chart showing the LHS and RHS values for the previous 6 hours of dispatch and the remaining period for which predispatch data is available. As is common throughout the application, this will show the data from the 5-minute predispatch where available and then 30-minute pre-dispatch data once the 5 minute data is exhausted. Hovering the mouse on the chart will show the values for LHS and RHS at the point in time the mouse cursor is over. This chart can also be changed to show the marginal value instead of the LHS and RHS values for the constraint equation.
The bottom left panel shows general details about the constraint equation as well as constraint set membership.
| Data | Description (taken from MMS datamodel 4.18) |
|---|---|
| Description | Detail of the plant that is not in service
Source AEMO InfoServer Table: GENCONDATA Field: DESCRIPTION |
| Impact | The device(s) that is affected by the constraint e.g. Interconnector, Generator(s) or Cutset
Source AEMO InfoServer Table: GENCONDATA Field: IMPACT |
| Reason | The contingency or reason for the constraint
Source AEMO InfoServer Table: GENCONDATA Field: REASON |
| Additional Notes | Extra notes on the constraint
Source AEMO InfoServer Table: GENCONDATA Field: ADDITIONALNOTES |
| Limit Type | The limit type of the constraint e.g. Transient Stability, Voltage Stability
Source AEMO InfoServer Table: GENCONDATA Field: LIMITTYPE |
| Region | Derived from GENCONID. AEMO use a naming convention when formulating the identifiers for constraint equations (the Constraint ID). The first characters of the naming convention identify the Region, or other special conditions, to which the constraint equation applies. Source AEMO InfoServer Table: GENCONDATA Field: GENCONID |
| Constraint Type | The logical operator (=, >=, <=)
Source AEMO InfoServer Table: GENCONDATA Field: CONSTRAINTTYPE |
| Weight | The constraint violation penalty factor
Source AEMO InfoServer Table: GENCONDATA Field: GENERICCONSTRAINTWEIGHT |
| Active Timeframes | Indicates if the constraint RHS is to be used for DISPATCH, PREDISPATCH, STPASA or MTPASA
Source AEMO InfoServer Table: GENCONDATA Fields: DISPATCH, PREDISPATCH, STPASA and MTPASA |
| Version | Version with respect to the effective date
Source AEMO InfoServer Table: GENCONDATA Field: VERSIONNO |
| Effective Date | Effective date of this constraint
Source AEMO InfoServer Table: GENCONDATA Field: EFFECTIVEDATE |
| Author | User authorising record
Source AEMO InfoServer Table: GENCONDATA Field: AUTHORISEDBY |
| Source | The source of the constraint formulation
Source AEMO InfoServer Table: GENCONDATA Field: SOURCE |
| Modifications | Details of the changes made to this version of the constraint
Source AEMO InfoServer Table: GENCONDATA Field: MODIFICATIONS |
Finally, the bottom right panel shows the Left Hand Side terms for the constraint equation.
Plain English Translation
This section shows the Plain English Translation of the Constraint Equation, as supplied by the AEMO.
For full information, please click here.
Navigation
The constraint set membership section allows you to navigate to the Constraint Set Details for any of the constraint sets that this constraint equation is a member of.
The Equation LHS Terms panel allows you to navigate to either the Station Details for the station that a unit belongs to where LHS term is a unit or the Interconnector Details where the LHS term is an interconnector. Region LHS terms are not navigable.