The Power Flow Setup dialog can be launched from the Analysis menu's Setup for Analysis Execution dialog by selecting Power Flow (in the Analyses Available frame) and then choosing the [Edit Analysis Parameters] command.
Constant Current - directs Power Flow to model all loads as constant current. (See details from Power Flow Introduction.)
Constant P and Q - directs Power Flow to model all loads as constant real (kW) and reactive (kVAR) power. (See details from Power Flow Introduction.)
Voltage Dependent Current - directs Power Flow to apply voltage dependency factors to all loads throughout the circuit. (See details from Power Flow Introduction.)
% Volt Difference - If calculated voltage change between two successive iterations is within specified percentage, Power Flow completes execution and proceeds to reporting.
% Current Change - If calculated current change between two successive iterations is within specified percentage, Power Flow completes execution and proceeds to reporting.
Max Number of Iterations - If specified number of iterations has been completed without meeting convergence criteria, Power Flow stops execution, highlights and attaches message to start of circuit component.
Generate a Report - When selected, application generates an ASCII output report, which can be output as:
ONLY Print Summary - Only a summary of the final Power Flow report will be displayed and available for printing.
Comma Separated - application results are output in columns separated by a comma, which can then be imported into a spreadsheet.
Assign Report Name - allows the user to specify the file name for the output report.
Default Report Name - directs application to use the default name (i.e. vtEst.rep) for the output report, overwriting an existing report file with the same name.
Click on the Select
Report Sections button to launch a dialog menu for limiting Power
Flow report output to selected sections.
Use
Circuit Measurements - directs Power Flow to use Circuit Measurements.
If not checked here, then Power Flow will not use
available measurements.
Measurements can be of type current, real power, or reactive power.
Loads are scaled to cause power flow calculated values to agree with circuit measurements.
Entered Voltage measurements can only be matched at the start of circuit, with loads scaled so the downstream results sum to the circuit measurement.
The scaling factors are stored with every line/cable section.
Use Contingency Mode Analysis - When selected, Power Flow uses smaller iteration step sizes, compromising speed for better solution stability.
Use Emergency Device Ratings - When selected, Power Flow uses emergency device ratings. Otherwise, normal device ratings are used.
Keep Results for Visualization - retains Voltage and Current results from run, such that when system is Saved to File and subsequently read back into DEW, power flow can use the precalculated results to generate the application's other output values for review/display.
Use Saved Visualization Results - only available when system has been previously run to Keep Results for Visualization, it enables user either to use the stored results (when selected) or to run application using a new scenario.
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General functionality for common windows commands and features found on dialogs include: Display Window - When applicable, this read-only window typically appears just above the command button set and displays descriptive messages related to the last menu selection. [OK] - Command button to accept current selections as user input and exit dialog. [Cancel] - Command button that exits dialog and does not incorporate any changes made since last opened. [Reset] - Command button that immediately returns all items on the menu to their default settings. [Help] - Command button that launches Help application. [About] - Command button that displays version, copyright and proprietary information. |
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