assessment. These models are suitable for power system transient simulation studies with numerical integration time steps in the range of 1-5 ms. Such models are based on quasi-steady-state positive-sequence phasors and usually do not include fast electromagnetic transient dynamics and fast inverter current controls. To have models accommodating a wide range of operating conditions, including unbalance, fast dynamics, and P∗ + PI P- Q + Q∗ - PI LPF θPLL αβ - PR vβ LPF dq - iα iβ abc PR vα αβ va vb vc (b) 40 20 -20 -40 100 200 -200 100 40 20 -20 -40 200 -200 100 Frequency (Hz) (d) 102 102 Black: Measurements Red: Model 100 102 40 20 -20 -40 200 -200 100 Frequency (Hz) 102 100 102 Measurement Model 102 200 -200 100 102 40 20 -20 -40 100 102 may/june 2022 ieee power & energy magazine 75 Phase (Degrees) Mag (dB) Phase (Degrees) Mag (dB) Phase (Degrees) Mag (dB) Phase (Degrees) Mag (dB)