Software Patches

December 6, 2019

Features and Improvements

  • Sensitivity Calculations: Modified "Set Sensitivities At Out Of Service Buses To Closest" now enabled to work with Multiple TLR calculations. ETLR and WTLR not recalculated.
  • Transient Stability: Adding a new induction motor model named "InductionMotor3P_A_Beta". Traditionally, detailed induction motor models used in transient stability simulations have not modeled the frequency dependence of the electrical equations. As a result the induction motor model with a constant mechanical torque would return to a new steady state that was a similar constant power instead of scaling with the system frequency. This new InductionMotor3P_A_Beta model will include the frequency dependence.
  • Transient Stability: Added new fields for TSContingency objects to show totals for "Load Relay Tripped" and "Model Tripped" MW Fields.
  • Bug Fixes

    • Transient Stability: The CMPLDW and CMPLDWNF models had hard-coded the Trst field for single-phase air-conditioner models to be 0.4 seconds. This was a mistake as the input data included this value.