Software Patches

October 28, 2010

Features and Improvements

  • Transient Stability: Added validation check for the ESAC8B model to ensure that both Kir=0 and Kpr=0 is not allowed. The auto-correction will change Kpr to 40 if both are zero.
  • Transient Stability: When showing plots in the transient stability dialog Simulator now remembers the size and location of the plot window if you change it. When showing a plot on subsequent stability runs during that session of Simulator the size and location will be remembered.
  • Transient Stability: Added validation check for ropen and rup to be positive numbers and rclose and rdown to be negative numbers.
  • Transient Stability: Added more error checking with IEEEST stabilizer model when A2/A4 values are small.
  • Transient Stability: Added use of 8 subintervals of integration for the EXAC1 model if Ka/Ta is larger than 10,000
  • Transient Stability: Fixed small time constant issue with ESAC8BGE model
  • Transient Stability: Added read/write support for the HYGOVR model (implementation in dynamic simulation is not completed yet)
  • Bug Fixes

    • Auxiliary Files (SCRIPT and DATA Sections): Fixed error in using the SaveCase() command from a script file. Error was introduced in the patch on October 15.
    • Contingency Analysis: Fixed errors that could occur when using Free-Floating Windows mode and opening or closing the contingency analysis dialog.
    • Fault Analysis: When choosing to write out an AUX file describing all the fault analysis data, the transformer grounding configuration were not being written. A DATA section is now written with this information.
    • Simulator Automation Server (SimAuto): Fixed error in using the SaveCase command. Error was introduced in the patch on October 15.
    • Transient Stability: Fixed error in the handling of circuit parameters for the WT2G model.