Type of Inverter

Type of source

Type of control

MG mode operation

Grid-feeding

Ideal current source

Follows P-Q (ref)

Only suitable for on-grid

Grid-forming

Ideal voltage source

Provides V-f (ref)

Only suitable for off-grid

Grid-support grid-feeding

Droop controlled current source

Adjusts P-Q (ref)

(according to V-f level)

Suitable for both modes

(on-grid and off-grid)

Grid-support grid-forming

Droop controlled voltage source

Provides V-f (ref )

(according to P-Q level)

Suitable for both modes

(on-grid and off-grid)