Software Patches

June 24, 2014

Features and Improvements

  • Contingency Analysis Tool: Added new contingency action with Injection Groups to drop a specified number of elements in the group.
  • Contingency Analysis Tool: Added option with Injection Group contingency action to specify when using Merit Order Open if the total MW dropped is allowed to exceed the desired amount or not. Previously, the default was to never exceed the desired amount.
  • General: Added options with individual Participation Points for Injection Groups to specify the ParFac based on a field of the participant or a Model Expression.
  • Sensitivity Calculations: When calculating PTDF values added a new MWAtZero:1 field for an interface which is similar to MWAtZero, but it assumes each transfer direction containing an injection group is configured to represent an area and as a result the "net injection" of each injection group in the MWAtZero:1 calculation is assumed to be equal to the export of the most common area in the injection group.
  • Bug Fixes

    • General: Fixed bug with storing Base Case values for Branch objects for the Difference Flows tool.
    • Sensitivity Calculations: When opening the PTDF dialog, the type is automatically set to Multiple if any directions are defined.
    • Sensitivity Calculations: Modified so that the Multiple Direction PTDF value fields for Branch and Interface objects are only available as a field/column if the Direction is marked as "Include = YES". This ensures that when using the script command SaveData with the variable "FGPTDFMult:ALL" or "LinePTDFMult:ALL" that fields are not included for directions that are skipped.
    • Sensitivity Calculations: Modified Interface field for showing MWAtZero for PTDF calculations to only include Directions marked as "Include = YES" in the calculation.
    • Transient Stability: Added up to 6 stages for LDST2 model. Previously it only had 3 stages.
    • Transient Stability: Continuing to fix the treatment of single phase air conditioner models under extremely low voltages. This impacts CMPLDW, LD1PAC, and CMPLDWNF.