Software Patches

September 10, 2018

Features and Improvements

  • Transient Stability: Modifications in DER_A model and DGDER_A model to modify the feedback of Pord to the power and reactive power control blocks. This must be the feedback for this model because the fractional tripping means that the terminal power is not an appropriate feedback.
  • Transient Stability: Also modified how the rrpwr rate limit on the Ip power block works. It will not rate limit based on the absolute value. Thus if Ip>=0 then it will be a rate limit in the positive direction and if Ip<=0 then it will be a rate limit in the negative direction. This way it will always permit the device to quickly move toward zero power, but then limit how quickly it moves away from zero. This is needed in case the DER_A is used to represent a storage device.