Software Patches

January 28, 2011

Features and Improvements

  • Case Information Displays: Modified the right-click menu for case information displays so that if no substations exist, then the Sub View is not enabled.
  • File Formats: When loading a RAW or EPC file, the participation factor for generators at a slack bus were set to zero. This has been changes so slack generators are set the same as other generator (MBase/SBase)
  • Integrated Topology Processing (ITP): Added a new field for object types Branch, Gen, Load, Shunt, and DCLine which shows the "Derived Status". For full topology power system models, this field will show whether the breakers adjacent to a device are OPEN or CLOSED. If the device is energized, the field will always show CLOSED. If the device's actual Status is OPEN, the field will alway show OPEN. If the device's actual status is CLOSED, but the device is not energized, the software will determine if any adjacent Breaker objects are CLOSED in which case the derived status will show CLOSED - otherwise it will show OPEN.
  • Transient Stability: Added the ability to load the MCRE, MTRLD, GNET, and BASEGEN files each separately if desired.
  • Transient Stability: Added new script commands for Transient Stability Tool which are all available in the PowerFlow submode.
  • Transient Stability: TSSolveAll - Solves all specified transient contingencies.
  • Transient Stability: TSSolve("ContingencyName", [StartTime, StopTime, StepSize]) - Solves only the specified transient contingency. StartTime, StopTime, and Stepsize are specified in seconds.
  • Transient Stability: TSWriteOptions("FileName", [opt1, opt2, ... opt5], KeyField) - Save the transient stability option settings to an auxiliary file specified by FileName. Opt1 through Opt5 should be set to YES or NO according to the specific option categories to save. These parameters are optional and the default is YES for any parameter not specified. opt1 - Save Dynamic Models; opt2 - Save Stability Options; opt3 - Save Stability Events; opt4 - Save Results Settings; opt5 - Save Plot Definitions; KeyField – Optional parameter. Primary, Secondary, or Label. If not specified set to Primary by default.
  • Transient Stability: TSCalculateSMIBEigenValues - Calculate single machine infinite bus eigenvalues. Initialization to the start time is always done before calculating eigenvalues.
  • Transient Stability: TSSaveTwoBusEquivalent("PWBFileName",[BUS busnum]) - Save the two bus equivalent model of a specified bus to a PWB file. Initialization to the start time is always done before saving the two bus equivalent. “PWBFileName” – name of the PWB file to which to save. Bus can be specified by number [BUS busnum], name/nominal kV combination [BUS "busname_nominalKV"], or label [BUS "buslabel"]
  • Transient Stability: TSLoadGE("FileName",GENCCYN) - Loads transient stability data stored in the GE DYD format. “FileName” – name of the DYD file to load. GENCCYN - YES or NO. Set to YES to split combined cycle units. Set to NO to leave them alone.
  • Transient Stability: TSLoadBPA("FileName") - Loads transient stability data stored in the BPA format. “FIleName” – name of the BPA file to load
  • Transient Stability: TSLoadPTI("FileName", "MCREfilename", "MTRLOfilename", "GNETfilename", "BASEGENfilename") - Loads transient stability data in the PTI format. “FileName” – name of the DYR file to load. This is NOT an optional field. All of the files listed after are optional. If not loading these particular files, specify an empty string, "".
  • Bug Fixes

    • Sensitivity Calculations: The Sensitivity value for a branch's Mvar or MVA flow when the branch was connected to a PV bus was not being properly calculated. This has been fixed.
    • Transient Stability: Fixed an error when reading the MCRE field with how omitted fields are treated in the MCRE file.