Software Patches

August 2, 2019

Features and Improvements

  • File Formats: Added bad data handling when reading an EPC file with a generator with cont_mode = 4 if the Vcsched is set to an unreasonable value. (We were seeing cases where value was set to 24.000 as user entered value in kV mistakenly). When Vcsched is specified outside the range 0.85 - 1.15 we will instead assuming cont_mode = 0, the regulated bus is the terminal bus, and the VoltSet is the present terminal voltage.
  • Bug Fixes

    • Available Transfer Capability (ATC) Tool: Fixed Access Violation that would occur when using the Available Transfer Capability tool when using the Iterated Solution Methods. This bug only impacted Version 21.
    • File Formats: Added ability to read the cont_mode = 4 from a generator in an EPC file. This then uses a field "Vcsched" field. When reading cont_mode = 4, the generator is set to as follows
      VoltSet = Vcsched
      UseLineDrop = YES
      Rcomp = RcompEPC * SBase/MVABase
      Xcomp = XcompEPC * SBase/MVABase
    • Time Step Simulation: Fixed bug when using a file Data Source on the Model Analysis Form when no plots have been defined. Even though the plots is not being used as the source an error would occur. Now a file can be specified without needing plots defined as well.