Software Patches

September 21, 2010

Features and Improvements

  • Auxiliary Files (SCRIPT and DATA Sections): Added support for general script commands in the AXD file format to manipulate oneline diagram objects. The following commands can be used: ExitProgram, LoadScript, LoadData, SelectAll, UnSelectAll, SaveData, SaveDataWithExtra, CreateData, DeleteFile, RenameFile, CopyFile, SetCurrentDirectory, and SaveObjectFields.
  • Auxiliary Files (SCRIPT and DATA Sections): The field "Selected" can now be used with oneline display objects. This can be used in the script section for AXD files.
  • Available Transfer Capability (ATC) Tool: Continuing to improve speed of the ATC calculation.
  • PV and QV Curve (PVQV) Tool: PV Curve Tool state archiving is now available when using Integrated Topology Processing.
  • Transient Stability: Modified the internal storage of the list of Transient Contingencies so that they are sorted. When creating a large number of them (1000s) this is required to improve the speed of reading/writing information from auxiliary files.
  • Transient Stability: Added full support for the WT2T, WT2P, and WT2G wind turbine models.
  • Transient Stability: Added better reporting of loads that don't initialize.
  • Bug Fixes

    • File Formats: Fixed an error introduced in the last patch which caused problems when loading old PWB files and when loading in PTI RAW files. The load would abort while reading the switched shunt records.
    • Power Flow Solution: Improved the performance of the angle smoothing routine when used to close in low impedance branches adjacent to a large number of other low impedance branches (such as in a full topology model).
    • Transient Stability: Fixed an error with reading the WT3E model from a DYD file.
    • Transient Stability: Improved the accuracy of the initialization of the slip for induction motor load models (such as CIM5, CIM6, MOTORW). This helps ensure that everything initialize to exactly zero derivatives. Previously they were very close. Now they are nearly exactly at zero derivative.
    • Transient Stability: Fixed an error in the initialization of the ST6B (also known as ESST6B) exciter when the Km <> 0.