Software Patches

February 15, 2011

Features and Improvements

  • Time Step Simulation: Modified the Time Step processing when using the SCOPF algorithm at each time step so that less messaging is sent to the Time Step dialog regarding the progress of the sCOPF solution. All the messaging to status edit boxes on the Time Step dialog was greatly slowing down the solution process.
  • Time Step Simulation: When using the DC-Approximation, modified the SCOPF dialog so that less messaging is sent to the SCOPF dialog regarding the progress of the sCOPF solution. All the messaging to status edit boxes on dialog was greatly slowing down the solution process.
  • Transient Stability: When inserting a new machine model at a generator, add the ability to initialize the new generator model with parameters taken from an existing machine model of a different type.
  • Transient Stability: Added newly named model for ESDC4B, ESST6B, ESST7B which are identical to the DC4B, ST6B, and ST7B models. Done to make names consistent with DYD file naming.
  • Bug Fixes

    • Case Information Displays: On the Area or Zone Tie-lines case information display, a tie-line representing a DC line was not properly showing the Far Bus' number and other information. This has been fixed.
    • Optimal Power Flow (OPF): Modified how OPF solution involving multiple islands with dispatchable MW Transaction and DC Lines is coordinated. The DC lines and MW Transactions are now coordinated to ensure that the inter-island DC lines flows are appropriately managed.
    • Optimal Power Flow (OPF): When using a dispatchable MW Transaction between two areas on OPF with the MW transaction price determined by the OPF, the post-OPF book-keeping for showing an Area's total cost including transaction costs was not handled appropriately. This has been fixed so that the Import and Export area have an appropriate exchange of money for the transaction exchanged.
    • Power Flow Solution: Fixed potential floating point error when a failure occurs in the robust solution process.
    • Power Flow Solution: When loading a power system model, additional code was added to ensure that generators regulated the same bus have the same setpoint.
    • Time Step Simulation: Modified the Schedule Subscription dialog to sort the object id list, field list, and schedule list alphabeticially.
    • Time Step Simulation: Fixed error when showing the Schedule Subscription dialog when specifying a multiplier with a negative sign.
    • Time Step Simulation: Added ability to use an advanced filter when showing the list of Schedules or the list of Schedule Subscriptions
    • Transient Stability: When loading in an AUX file containing plot definitions, the Plot Designer was updated to list this new definitions until the Transient Stability dialog was closed and reopened. This is now properly updated immediately.
    • Transient Stability: Fixed bad behavior of the Transient Stability Plot Designer when running in Free-Floating Windows mode.
    • User Interface Dialogs: When using the user-interface to apply an advanced filter to a oneline display object (such as on the Select By Critera or Export KML file dialogs), an access violation could occur. This has been fixed.