Software Patches

February 1, 2021

Bug Fixes

  • Contingency Analysis: Fixed access violation that could result when saving an auxiliary file for contingency options and settings that include an injection group with unlinked participation points.
  • Transient Stability: Bug fix for Governor Model UCGBT -- error input in PID-block was modeled incorrectly. This was causing an unstable decline in the generator speed, even when the system-level dynamics had almost converged to a new steady-state. It is very likely that users would not have noticed this at the system-level during a simulation of less than 60 seconds. Instead, this problem was obvious at the system-level when running extended-duration simulation longer than 120 seconds.
  • Transient Stability: Made the bus filter used when saving an AUX file of all stability model also apply to the DistributionEquivalents and LoadModelGroups. It was only using Area/Zone filters as the special use of the bus filter had not been implemented for these objects.
  • Transient Stability: Fixed the enforcement of the Iql1/Iqh1 reactive power limit on Iqinj ror the REEC_A, REEC_B, REEC_C, and REEC_D.
  • User Interface Dialogs: Fixed access violation that would occur when opening the Aux File Browser.