Q: Why do short circuit models and simulations become nonlinear in networks with IBR?

Q: How does OneLiner compute the fault solution when the network model includes nonlinear IBR models?

Q: What is the prefault solution, and how does it impact a fault simulation in OneLiner?

Q: Why can't I use the "Assumed Flat" Prefault Voltage option when simulating IBR?

Q: Do I have to include load in my short circuit network and solve the powerflow for accurate IBR simulation and if so how?

Q: I placed a 3-phase fault near a wind/solar plant. Why is current output zero at the convert-interfaced resource (CIR) or type-3 wind plant?

Q: Why in some cases the CIR model does not work and the VCCS model works, or vice versa?

Q: The converter-interfaced resource model require me to input a "slope" parameter, but all I got from the solar or type-4 wind plant manufacturer is a table with 3 columns: "Voltage (pu), Current (A) and Power Factor Angle (deg)?" How do I deduce the sl

Q: Why does it matter whether the short circuit solution is linear or nonlinear?

Q: Can I use the system equivalence tools or Thevenin equivalents if IBR models are present in my OneLiner network?

Q: We sometimes provide Thevenin equivalent fault impedances that are calculated in OneLiner to others for use in dynamic stability simulations. How are these impedance values impacted by the presence of IBR models in the OneLiner network model?

Q: How do I know whether a fault simulation in OneLiner failed to converge?

Q: What does it mean if my fault simulation didn't converge?

Q: If my fault simulation did converge, does that mean my model is error free?

Q: Why should I review and calibrate my existing short circuit model before adding IBR models?

Q: What can I do to troubleshoot non-convergence within my network model?

Q: What if I'm still having convergence issues even after calibrating my network model?

Q: Why does the fault simulation sometimes take so long after I added many IBR models to my network model?

Q: What models are available in OneLiner to represent IBR?

Q: Which OneLiner IBR models correspond to which physical IBR devices?

Q: Have you benchmarked the short circuits simulation results with converter-interfaced resources from OneLiner against outputs from other power-system simulation programs?

Q: Should I aggregate IBR models in OneLiner, and if so, to what level should I aggregate?

Q: What is the expected output of the CIR model?

Q: Why does a CIR model shut down on low or high voltage when the voltage appears to be within the acceptable range?

Q: Does OneLiner currently have any grid-forming IBR models?

Q: Is ASPEN working on improvements to the existing IBR models?

Q: Is ASPEN working on new models for new IBR devices?