Software Patches

May 23, 2024

Bug Fixes

  • Contingency Analysis: Bug fix for contingency AC Method Options
  • QV Curve Tool: When loading a QVCurve object, the QVPoints were not being cleared correctly before loading the SUBDATA section with new points. All points should be deleted before loading the SUBDATA, but points were being appended instead. This has been fixed.
  • Transient Stability: Some initial limit violations were not being reported in the State Limit Violations tables. This has been fixed. The examples were various exciters for which Vb > Vbmax at the initial condition.
  • Transient Stability: When load was being tripped by dedicated load relays such as lsdt9, the Total Nominal MW tripped field for the loads in transient stability was giving the wrong result. It was working properly for load model tripping such as the composite load models (CMPLDW and CMLD), but when missing that load tripping with the relay tripping the result was incorrect. That was corrected.
  • User Interface Dialogs: When using Interface feature to "Modify Definition due to Isolated Elements on Selected Interfaces" it was possible for the tool to choose to choose to isolate all loads and gens in the main island. This was rare but could occur and has been fixed.