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Simulator 16 User Guide - PowerWorld

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OPF Nomogram Records<br />

This list displays OPF specific information about the nomogram records in the case. To show the list,<br />

select Optimal Power Flow > Results > Nomograms in the Model Explorer. This display is<br />

actually a page of a display showing all the potential inequality constraints in the power system. The<br />

top portion of the display repeats the fields shown on the Constraint Options page of the OPF Options<br />

and Results dialog.<br />

To view the nomogram records click on the Nomogram Interfaces tab. This displays the nomogram<br />

interfaces page which is a class of Case Information Display and therefore can be used in a manner<br />

consistent with the other case information displays. Specific formatting options are available from the<br />

local menu, which can be accessed by right-clicking on any field in the page.<br />

By default the Interface Records page contains the following fields:<br />

Nomo. Name<br />

Name of the nomogram.<br />

Nomo. Seg.<br />

The segment of the nomogram. Each segment of the nomogram is treated as a separate constraint<br />

in the OPF, and therefore is listed individually in the OPF nomogram table.<br />

Monitor<br />

This field will be set to YES if the nomogram segment is monitored during the OPF.<br />

Interface MW Flow<br />

The total MW flow for the segment of the nomogram.<br />

MW Limit<br />

The segment MW limit.<br />

Percent<br />

The amount of MW flow on the segment as a percentage of the segment’s limit.<br />

Monitor Direction<br />

The direction on the segment in which the flow is being monitored.<br />

Monitor Both Directions<br />

Yes or No field indicating if both directions should be monitored at the same time.<br />

MW Marg. Cost $ / MWh<br />

The marginal cost of enforcing the limit on the segment.<br />

Constraint<br />

This field will be set to Binding if the nomogram limit is a binding constraint in the OPF solution, or<br />

Unenforceable if the nomogram limit is unenforceable with the available control set.<br />

©2011 <strong>PowerWorld</strong> Corporation<br />

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