Software Patches

April 12, 2018

Features and Improvements

  • Transient Stability: Modified the LHFRT model so that when obtaining the frequency measurement at the bus, if the voltage is below the "Minimum PU voltage for relay frequency measurement", then the frequency is treated as at nominal
  • Bug Fixes

    • Power Flow Solution: Fixed another issue with the svc smsmo2 to prevent oscillations. Now it will move the shunt only if it improves the voltage or the voltage movement is greater than a tolerance and greater than the current voltage difference from the target voltage value. Also it checks that the voltage difference between new B value voltage and the target and the difference between old B value voltage and the target is greater than a tolerance. This prevents oscillations from cases in which the solution was already close enough.