Software Patches

September 9, 2025

Features and Improvements

  • Auxiliary Files (SCRIPT and DATA Sections): Added DCTransmissionLine to the objects available in the move script command, allowing users to move the dc transmission line.
  • Bug Fixes

    • Transient Stability: In MSS1 and MSS2 switched shunt dynamic models, the thresholds for low and high voltage switching operations were correct in the data record but swapped in the dynamic model implementation. Users might have observed continuous repeated switching of the switched shunt in the events list, or seen a forced oscillation type of behavior in certain bus voltage magnitude or frequency signals. This has been fixed.