Software Patches

August 16, 2011

Features and Improvements

  • General: Modified the storage of injection groups so that they are stored and maintained in a list sorted by name. This ensures that if 1000s of injection groups are created that it does not slow down loading injection group information.
  • Transient Stability: Added full support for the spdmult, UELin and Exclim paramters to ESDC1A and ESDC2A
  • Transient Stability: Modified the EXST3 and IEEET1 exciters to add optional spdmult parameter to support the difference between these models in PSLF and PSSE
  • Bug Fixes

    • Available Transfer Capability (ATC) Tool: When using an injection group as a source in either the PV or ATC ramping and this injection group contained other injection groups with loads, it was possible that the appropriate transfer amount would not be implemented.
    • Bus View and Substation View Onelines: When showing the consolidated bus view in a full-topology model bus view, the font color of some fields was not obeying the default colors.
    • Case Information Displays: Fixed an access violation that occurred when types were mismatched in a custom expression (like when trying to add a string and an integer together).
    • Case Information Displays: Fixed bug so that viewing the differences in column XF Auto for a branch can actually be shown when viewing the difference case.
    • Contingency Analysis: When loading the PTI CON file entries for MOVE, entries were always being interpreted as SHUNT moves, so that GENERATOR and LOAD moves were not properly read. This has been fixed.
    • File Formats: Fixed the handling of how aloss is used to determine the metered point on a multi-section line when reading in the EPC files.
    • File Formats: Fixed loading of a PWB file to append information to a case to ensure that limitset information is read correctly for Buses, Branches and Interfaces.
    • File Formats: Fixed loading of a PWB file to append information to a case to that duplicate Injection Groups, Interfaces, Nomograms, and Super Areas are not created.
    • File Formats: Fixed error in Writing out switched shunts flagged as a Bus Shunt to the EPC file shunt records. If the switched shunt did not contain any blocks it would write out a nominal Mvar of zero.
    • Optimal Power Flow (OPF): When using the DC approximation and running the OPF or SCOPF, fixed an internal tolerance error which could result in solution never completing.
    • PV and QV Curve (PVQV) Tool: When using an injection group as a source in either the PV or ATC ramping and this injection group contained other injection groups with loads, it was possible that the appropriate transfer amount would not be implemented.
    • Transient Stability: For GPWSCC, the order of the parameters Kp and Kd were reversed. This has been fixed.
    • Transient Stability: Fixed error in REXS to multiply it's output by Efd
    • Transient Stability: Fixed error in saving a two-bus equivalent at buses which contained multiple generators.