Software Patches

October 3, 2014

Features and Improvements

  • Auxiliary Files (SCRIPT and DATA Sections): Modified "Move" script action to allow moving a 3WXFormer record.
  • Auxiliary Files (SCRIPT and DATA Sections): Added optional parameter to ReassignIDs; if "UseRight" is "YES", then the last two characters of the specified field will be used to create the new id rather than the first two characters. The parameter defaults to NO. The script command is now ReassignIDs(objecttype, field, filter, UseRight).
  • Contingency Analysis Tool: Added the ability to auto-insert a list of substation outages
  • File Formats: When using the case information display options from a table of switched shunts or transformers to save the records to the EPC format we now aalso save the bus records automatically as well. The EPC format embeds the voltage regulation information for the shunts and transformers in bus records. Saving the bus records additionally helps avoid some confusion, though the user still must be careful.
  • Transient Stability: Added error checking for WT3G2, WT3G, WT4G, WT4G1 and REGC_A so that if LVPL=0 then it ignores the low voltage power logic
  • Transient Stability: For LD1PAC, when fuvr=0 we were still reporting transient stability events related to the pickup of the under voltage relay even though it would never actually open anything. This has been fixed to no longer report these events if fuvr=0.
  • Transient Stability: Changed the CONV_IntMtnPP and CONV_Adelanto converter models to use a CosMinAngle equal to 0.95630476 instead of 0.956. It's a very minor change but using 0.956 signifies an minimum firing angle of 17.059 degrees which doesn't match the initial condition of 17.000 often seen in cases.
  • Bug Fixes

    • Transient Stability: fixed errors in using a CIM6 motor model which resulted in an access violation
    • Transient Stability: When reading a DYD file, netting records which had a line of text listing only ONE bus listed were not being properly read (2 or more worked fine). This has been fixed to properly read the buses and disable stability models.
    • Transient Stability: For generator transient stability models of SVCs, any MW output of the generator was not properly accounted for in transient stability. This has been fixed.
    • Transient Stability: Added a fix for the previous patch which ignored CMPLDW models which were negative.
    • Transient Stability: modified SVCWSC and VWSCC to ignore the fast override block if DV=0.
    • Transient Stability: Fixed error in current control of the CONV_Adelanto and CONV_IntMtnPP multi-terminal DC line transient stability model.
    • Transient Stability: Fixed small error in initializing the Pref of a GGOV1 governor if the dB parameter was not zero.