Software Patches

August 18, 2021

Features and Improvements

  • Available Transfer Capability (ATC) Tool: For the TransferLimiter object type, the variables for ATC_ExtraMonitor and ATC_ExtraMonitorSens can now be identified by the object identifier for the object they are monitoring instead of the location number. Example: ATCExtraMonitor:"Branch '1' '2' '1'".
  • Bug Fixes

    • File Formats: Fixed a bug where when reading an EPC file with multiple Shunt sections, we would only process the shunts in the last section read, and the previous sections of shunts would be lost.
    • Oneline Diagrams: After the file save is complete when using the ExportOneline script command, the oneline will now be returned to the options and view that were in place prior to issuing the command.
    • Transient Stability: Any OEL connected to Exciter ESST4B now has the ability to automatically modify the VOEL output so that initial limit violation can be prevented when the "Modify Limits" option is chosen in Transient Stability options. This modification will only occur if an OEL can initialize to Activation Status = Idle.
    • Transient Stability: When Qref=0 for OEL4C, internally the program sets Qref to current Qmax from the power flow records. This was already being done. However, for generators that have an internal step up transformer, Qmax needed to be transformed to the generator terminal-side. This modification has now been made.
    • Transient Stability: Fixed the Exciters EXAC1, EXAC1A, EXAC2, EXAC8B and REXS to work properly when the Hard Limit is implemented with the OEL1 Over excitation model. Previously the EFd limits were calculated without taking into effect of the function Fex in the output of the Exciter.