Software Patches

April 22, 2026

Features and Improvements

  • Transient Stability: Added new load characteristic models for playing in a variation of the Load P and Q.
    * PQWave is allows you to specify a pulsing square wave, triangle wave, or sinusoidal wave for the P and Q of the load
    * PlayInLoad is allows you to define a PlayIn structure that has a variation of the load
    Both of these models are laying in a scalar function where 1.00 represents the initial MW of the load and the user can define a time-variation of this multiplier.
  • Transient Stability: Adding ability to read/write the REGFMB1U USRMDL from a DYR file and convert to the REGFM_B1 model. This is then written back to the DYR file as a REGFMB1 record.