Software Patches

May 19, 2016

Features and Improvements

  • Contingency Analysis Tool: Added Area, Zone and Balancing Authority fields to Contingency Elements and increased the numbers to include up to 8 of them instead of 4.
  • General: Adding support for filtering on DateTime fields.
  • Optimal Power Flow (OPF): Added OPF option to "Include only online devices in Injection Group calculation". The default behavior has always been to exclude offline devices. This option will allow you to include them.
  • Scheduled Actions: Added field for the Duration of a Scheduled Action.
  • Transient Stability: Added Area, Zone, Owners and Balancing Authority fields to Transient contingency and elements.
  • Bug Fixes

    • Available Transfer Capability (ATC) Tool: When using one of the iterated ATC methods, if the full transfer stepsize cannot be achieved during the part of the process where the transfer is actually implemented, the stepsize will be reduced by half until a solution is achieved or the stepsize falls below a tolerance. Previously, this tolerance was 10 times the MVA convergence tolerance. This could result in a very small tolerance and cause excessive iterations if no solution can be achieved. The tolerance for this process will now be the user defined Transfer Tolerance. This is a more reasonable tolerance and will make this part of the process consistent with the determination of acceptable stepsizes from the linear calculation.
    • File Formats: When writing the special object identifier for a branch that is part of a multi-section line to identify it by the multi-section line terminal buses and section number instead of any dummy buses, use the circuit ID of the multi-section line instead of the line section. The circuit IDs can be different. Apparently, when the & is included in a RAW file for the multi-section line circuit IDs, the line sections cannot include the &.
    • Power Flow Solution: Fixed a bug that would cause switched shunts not to move at a bus if a bus contains more than one shunt and the first one found has Auto Control = NO even though it has a valid control mode for automatic switching.
    • Transient Stability: Fixed some bugs with the initialization of the SVSMO2 model and setting the output of the SVC to a very low MVar value.
    • User Interface Dialogs: The Auto Control field is now enabled on switched shunt dialogs.