Software Patches

March 16, 2018

Features and Improvements

  • Auxiliary Files (SCRIPT and DATA Sections): Remove FilterPre from the list of required fields for a Filter object. Assume a value of NO if not present.
  • Auxiliary Files (SCRIPT and DATA Sections): On the Auxiliary File Export Format Description dialog, when choosing to Create Format for Complete Case and choosing "Complete Model", the dialog that appears allows you to choose which parts of the model to export. There is now a new check box on this dialog that allows you to specify for the Network Model portion to "(Split commonly changed fields)". Checking this new box will split up fields for some objects into 2 data sections: a section with fields that normally do not change and a second section with fields that commonly do change. This mimics what occurs when exporting data from the Present Topological Differences from Base Case tool.
  • Transient Stability: The swing equation for synchronous machines is 0.5/H*[(Pmech - Dw)/(1+w) - Telec]. In the result reporting for Simulator, the the accelerating power was being reported as Pmech - (1+w)*Telec and thus did not include the impact of the damping term D. For the vast majority of model the D term should be zero, however if D is not zero, then we will now report the accelerating power as Pmech - Dw - (1+w)*Telec instead.
  • Transient Stability: Added the DC4C exciter model
  • Bug Fixes

    • Auxiliary Files (SCRIPT and DATA Sections): Added messages in the log when reading Condition or ModelConditionCondition objects from an AUX file which have an invalid ConditionType specified for the ObjectField.
    • Auxiliary Files (SCRIPT and DATA Sections): Fixed a bug with the CalculateTLR script command that would produce an error if exactly 6 parameters were passed.
    • Oneline Diagrams: When showing the ThumbNail View on a oneline diagram, the selecting of any text-based fields on the main portion of the oneline may not working properly. If the zoom level of the ThumbNail was such that text would not be drawn inside the ThumbNail then the text could not be selected on the main portion of the oneline. This has been fixed.
    • PV and QV Curve (PVQV) Tool: When saving PV results to file and the base case is critical because of the Maximum Transfer being reached, the message about the Newly Critical scenario just said "base case." This indicates that the base case could not be solved rather than the scenario being critical because of the Maximum Transfer being reached. This has been fixed and the description of the scenario will now say "base case (Maximum Transfer)."
    • PV and QV Curve (PVQV) Tool: Fixed a rare infinite loop problem in which the PV tool could keep repeating the same transfer level over and over again. This would occur if the step size was reduced below the minimum step size because of specifying a maximum transfer level at which to stop the analysis AND a scenario would not solve at this step size.
    • User Interface Dialogs: Fixed a bug where renumbering areas, zones, or balancing authorities if the area contained switched shunts that were on continuous or SVC control. This would cause weird anomalies where areas/zones that were renumbered were appearing as if they were not empty.