Software Patches

May 14, 2018

Features and Improvements

  • Available Transfer Capability (ATC) Tool: Added more fields as valid fields to be used when using the option to Iterate on Action Status with linear contingency analysis. These fields include: Branch Max MVA, 3-winding transformer Status of primary, secondary, and tertiary windings, All Branch MVA Limits, and All Branch Amp Limits.
  • Available Transfer Capability (ATC) Tool: Added the contingency option to Iterate on Action Status to the ATC dialog. This option has always been used with linear ATC calculations, but it had previously only been found on the contingency dialog. When both dialogs are open at the same time, clicking on this option on either dialog will change the option on the other dialog.
  • Contingency Analysis Tool: Added more fields as valid fields to be used when using the option to Iterate on Action Status with linear contingency analysis. These fields include: Branch Max MVA, 3-winding transformer Status of primary, secondary, and tertiary windings, All Branch MVA Limits, and All Branch Amp Limits.
  • Difference Case Tool: When specifying your own AUX Export Format Description for use when exporting the changes between two cases using the Present Topological Differences Tool, we have modified how the NEW objects are written. The object types that are written will be determined by the specified AUX Export Format Description, but the fields that are written will be determined by the built-in "Network Model" format. This ensures that the list of required fields are included with New Objects.
  • Transient Stability: Added a flag "SELFCLEAR" at the end of a TSContingencyElement Action String for a fault. Normally when a fault point is isolated by opening branches in the system, the fault will NOT automatically clear itself and thus if lines are closed back in the fault will remain in place. When specifying SELFCLEAR, then when a fault point becomes isolated it will automatically clear itself at the same moment.
  • Transient Stability: Added support when auto-inserting transient stability fault definitions to use the new SelfClear feature of a fault.
  • Transient Stability: Added Exciter AC11C.
  • Bug Fixes

    • Contingency Analysis: When using the linear contingency process to Iterate on Action Status, it was possible that the correct flow was not being used if a TOPOLOGYCHECK action used a flow condition rather than a status condition check. The base case flow should be used until the first step in which the post-contingency linear flows are calculated. Instead of using the base case flows zero would be used instead. The intention of TOPOLOGYCHECK actions is to use statuses as check conditions, so this should have only been an issue in rare instances.