A Comparative Study between Reduced-Order and Switching Models of Grid-Following Inverter Interfacing Renewable Energy Sources

Table 2

Comparison between switching and reduced-order model.

Model type	Level of details	Linearity	Simulation time step	Simulation time^1	Most suitable studies
Switching model	Very high	Nonlinear	μs	∼20 s	(i) Control loop dynamics; (ii) Harmonics and filter design; (iii) Fast transients and switching dynamics; (iv) Efficiency optimization; (v) PWM schemes; (vi) Line effect
Reduced-order model	Low	Linear	ms	∼2 s	(i) Steady-state operation; (ii) Slow disturbances; (iii) Large network simulation

¹Required for completing one cycle of grid frequency (=20 ms).