Software Patches

December 1, 2010

Features and Improvements

  • Auxiliary Files (SCRIPT and DATA Sections): Added new script command DetermineBranchesThatCreateIslands(BranchesToProcess, StoreBuses, "FileName", SetSelectedOnLines);
    This script action determines the branches whose outage results in island formation. There are options to specify the branches to process, whether or not to store the islanded buses to the output file, the output filename, and an option to set the selected flag on branches that create islands. Note that setting the Selected field will overwrite the Selected fields.
    BranchesToProcess: The branches to consider while determining outages that create islands. ALL: consider all branches SELECTED: consider branches with a selected flag set to true AREAZONE: consider branches meeting AREA/ZONE filters "Filtername": consider branches that meet the filter given in filtername. Note that a valid branch fliter with the name specified by filtername must exist. StoreBuses: YES or NO field that specifies whether the buses in the island are stored in the output file. The output file is an aux file. The branches that create islands are stored in a single data section. When the buses are also stored, the buses are in a data section immediately following the branch data section, so there is a pairing between the outaged line(s) and the islanded buses.
    "Filename" : the name of the file to which the output will be stored. If the filename is empty ("") or simply blank, then the results will not be stored in a file. This will only be useful if the results are stored in the Selected field for the branches instead.
    SetSelectedOnLines: YES or NO field that determines if the SELECTED field will be set to YES for branches that create islands.
  • File Formats: When appending an EPC file with a scheduled voltage for a bus, the voltage setpoints for switched shunts and generators that are regulating this bus are now properly updated.
  • Bug Fixes

    • Oneline Diagrams: When inserting a new transmission line on a oneline, an access violation occurred. This has been fixed. The error was introduced in the 11/23 patch.
    • Transient Stability: Fixed minor bug in the REXSYS exciter