Software Patches

January 2, 2020

Features and Improvements

  • Case Information Displays: Added Nominal Tap Ratio field with Branch objects.
  • Transient Stability: Added options to plot and store results for the Meets Criteria field for Model Plane objects in transient stability. This value is reported as 0 for NO and 1 for YES.
  • Transient Stability: Added transient contingency element option that allows the generator delta and delta speed values to be directly changed. The application would mostly be system testing, such as phase angle for generator reclosing.
  • Bug Fixes

    • Auxiliary Files (SCRIPT and DATA Sections): When creating interface elements through the InterfaceElement object type in an auxiliary file, better error messages will be provided in the log when elements cannot be found in the case.
    • Auxiliary Files (SCRIPT and DATA Sections): Fixed bug in SetSelectedFromNetworkCut script command that reversed the order of the LowerMinkV and LowerMaxkV values. This was reversed even if using the defaults. This would result in branches not being selected.
    • Auxiliary Files (SCRIPT and DATA Sections): Fixing issues to allow AXD support for Model Expression pie charts.
    • File Formats: The ability to add DistMW and DistMvar (distributed generation MW and MVar) to a load record was added in Simulator Version 19. A bug was fixed in Simulator Version 20 on September 18, 2018 related to performing area generation control in areas that contained this distributed generation. For cases in Version 20 and Version 19 created before this change however and then stored to a PWB file, some internal solution variables were stored slightly off. This could cause strange behavior when opening a PWB file stored in version 19 into Simulator 20 and 21. The behavior would result in a bunch of generation moving immediately when solving a power flow. Assuming the inner power flow solution worked Version 20 and 21 would move the generators right back to where they started and from that point on never exhibit this behavior.
    • File Formats: When loading RAS in the Areva hdbexport format the VALID field will now be used for RAS, TRIGCON, GATE, RTRIG, RSTG, and RPACT objects.
    • General: Corrected some bugs with unlinked interface elements that would not correctly identify the original element or allow them to be relinked.
    • Oneline Diagrams: Fixed a bug with the area/zone/substation swapping not working with onelines.
    • Transient Stability: Added the ability to only operate one relay at a time in a load. It follows the same order as before just only added the first or relays found first at any level.