Software Patches

May 21, 2013

Features and Improvements

  • Contingency Analysis Tool: Added support for using the transient shunt model MSC1 inside the power flow based contingency analysis processor.
  • File Formats: Saving a removed multi-section line in the EPC format should correctly write the sections of the multi-section line with a status of -4. GE flagged for delete flag for multi-section line will be true if any section is flagged for delete.
  • GIC: Added the ability to edit a special record called the Unitified Transformer in the GIC dialog. This record provides one place to edit all the GIC-related inputs for both two-winding and three-winding transformers so that you do not have to navigate through the internals of the three-winding transformer model or the various ambiguities introduced by auto-transformers. Also added copy/paste support from case information displays, and AUX file support for doing these edits.
  • GIC: The unified transformer refers to the terminolgy "high", "medium" and "tertiary" bus instead of primary/secondary/tertiary.
  • Help: Added more description of the Relay Zones and Overcurrent Curves to Line Relay help
  • PV and QV Curve (PVQV) Tool: Added option to open Bus View for an object associated with a data series on the PV plots the same as you could already do with the transient stability plots.
  • Transient Stability: For governor G2WSCC and GPWSCC, modified to allow BTurb*TTurb to be zero with both set to zero if their product is less than 4*local_MinDelt.
  • Transient Stability: For governor G2WSCC, added validation/error correction for field Td, Tt, Tf, and Tp to match what was already done for G2WSCC
  • Transient Stability: For the DISTR1 line relay model, added additional tripping messages so you still see "Entered Zone" result events when the delay is zero. Also added "Trip Initiated" result event for DISTR1.
  • Transient Stability: When reading in a DYD or DYR file, we now set the option regarding how to treat saturation functions for which the magnitude of SE1 and SE2 are backwards. This option is set to "Flip Values" when reading a PSSE DYR file to match that treatment. This option is set to "Ignore Saturation" when reading a PSLF DYD file to match that treatment.
  • Transient Stability: Modified DISTR1 so that it will base the GUI features of showing the "% reach" in columns and on the various relay zone pictures so that it will look through a series of branches that end in the TransferTripLine#1 as long as this creates an island (similar to the "farbus" specified with other relays)
  • Transient Stability: Modified TIOCRS so that the Threshold current is now specified in AMPS instead of per unit.
  • User Interface Dialogs: Added multi-section lines to the difference flows tool.
  • Bug Fixes

    • Contingency Analysis: When changing the name of a contingency make sure that the name is unique and prevent the change if a contingency with the same name already exists.
    • File Formats: When saving out all transient stability options from the transient stability dialog, the transient contingencies were not being saved with secondary key fields if the user selected this option. This has been fixed.
    • Oneline Diagrams: Fixed an error associated with the drawing of various gauge objects which made them difficult to click on with the mouse and also made them draw incorrectly
    • Oneline Diagrams: Added a bug fix so that background lines will blink with dynamic formatting
    • Power Flow Solution: When a switched shunt is controlling the Mvar output of generators, we added checks to see if generators are at a Mvar limit. If at a limit, the calculation of the switched shunt change now includes the amount of change need to to bring the generators off the limit.
    • Transient Stability: Simulator now properly uses the "Monitor" integer flag for DISTR1 so that we only monitor if "Monitor=0"