Publications

Modeling inverters with grid support functions for power system dynamics studies

Guruwacharya, Nischal; Bhujel, Niranjan; Hansen, Timothy M.; Suryanarayanan, Siddharth; Tonkoski, Reinaldo; Tamrakar, Ujjwol; Wilches-Bernal, Felipe

A significant amount of converter-based generation, such as wind and photovoltaic, is being integrated into thebulk electric power grid to fulfill the future electric demand. Such converter-based distributed energy resources (DERs) will be providing multiple grid support functions (GSFs) to supportvoltage and frequency control of the power system. In thispaper, we present the development of a MA /Simulink-based simulation model to study power system dynamics whenDERs are equipped with GSFs. The simulation model of aninverter with GSFs is validated through comparisons against thecharacteristic curves for each function of the IEEE 1547-2018standard. The normalized root-mean-square-error (NRMSE) wascalculated to be less than 2%. The developed model is then used ina sample power systems dynamics study under various operatingconditions. Results show the exnected resnonse of inverfers withGSFs, properly supporting the grid voltage and frequency andmaintaining the value within an acceptable range.