Software Patches

March 22, 2013

Features and Improvements

  • Auxiliary Files (SCRIPT and DATA Sections): Sped up reading of buses from auxiliary files.
  • Contingency Analysis Tool: Added a contingency-specific solution option to disable SVCs independently of other switched shunts.
  • Contingency Analysis Tool: Added options to include transient stability relay models, TIOCRS, LOCTI, and TIOCR1, as part of the power flow contingency solution. Models can act during the solution if their conditions are met. Transient models will be evaluated after POSTCHECK actions are implemented.
  • GIC: The layout of the GIC portion of the branch dialog has been updated.
  • GIC: Modified to show "GIC" in the Simulator status bar when GIC calculations are being included in the power flow.
  • GIC: Added a "Validate Input Data for GIC" button on the GIC dialog. Presently, this only checks if any lines are longer than 776.5 miles (1/4 wavelength).
  • Help: Added new SimAuto function GetSpecificFieldList
  • Help: Added new SimAuto function GetSpecificFieldMaxNum
  • Help: Added information on transient stability user defined models
  • Power Flow Solution: Added a power flow solution optin to disable SVCs independently of other switched shunts. The area option for shunt control only applies to non-SVCs. SVCs can only be enabled/disabled globally or at the individual device level.
  • Simulator Automation Server (SimAuto): Added two new SimAuto functions: GetSpecificFieldList and GetSpecificFieldMaxNum.
  • Bug Fixes

    • Bus View and Substation View Onelines: Removed options that are specific to the bus view (Layout Options, Number of Tiers, and Open Multiple Bus Views) from being stored as part of named Oneline Display Options when they are saved to the PWB file. These options are only stored in the registry now.
    • Contingency Analysis: Fixed an access violation that could occur when running contingency analysis. This would only occur if a case contained areas spanning multiple islands.
    • GIC: When using the option to clear the GIC results from the power system, the Effective Amps and Neutral Amps are also cleared on the transformer.
    • GIC: Cleaned up the interface for the GIC solution so that when "Include GIC in Power Flow" is not checked, it will NOT automatically include GIC in the power flow even if a value for transformer losses exists.
    • Power Flow Solution: A bug was introduced in the March 14, 2013 patch that affects the remote regulation of generators that are regulating buses within the same grouping of buses connected by very low impedance branches. This could lead to convergence problems with the power flow. This has been fixed.
    • Simulator Automation Server (SimAuto): Complex values were getting returned as integers when using any of the GetParameters functions. This has been fixed.
    • Transient Stability: When saving results to hard drive and the directory path does not exist, selecting Cancel on the dialog that prompts you that it doesn't exist will now prevent the simulation from running.
    • Transient Stability: When saving a PWB case with transient stability results after a bus or generator that had transient stability statistics was deleted, an access violation could occur. This has been fixed.
    • Transient Stability: Fixed an access violation that occurred when opening the transient stability dialog if a user defined load model had been saved with the case.
    • Transient Stability: Fixed bug associated with the display of the transient stability ybus when there are internal buses modeled with the transient stability models.
    • Transient Stability: Fixed an access violation when reading in user defined models from Excel.