GRFORM: Modeling of droop-controlled grid-forming inverter in PSSE

A positive sequence user model in PSSE that represents a droop-controlled, grid-forming inverter. The model is described here: Du, W., Liu, Y., Huang, R., Tuffner, F. K., Xie, J., & Huang, Z. (24-28 April 2022). Positive-Sequence Phasor Modeling of Droop-Controlled, Grid-Forming Inverters with Fault Current Limiting Function [proceedings]. 2022 IEEE Power & Energy Society Innovative Smart Grid Technologies Conference (ISGT), New Orleans, LA, USA. doi.org/10.1109/ISGT50606.2022.9817530 Usage: Compile the user model with a Fortran compiler compatible with your PSSE version into a dynamic library, e.g. grform.dll.

Link the *.dll file with the PSSE skeleton Create the corresponding entries in the PSSE dynamic data *.dyr file, for example: 1234 'USRMDL' 1 'GRFORM' 1 0 0 13 7 2 0.15 0.05 0.0 5.86 1.2 0.0 0.01 1.0 0.0 0.01 0.1 0.01 2 / Run a dynamic simulation in PSSE