An Improved Control Strategy for a Four-Leg Grid-Forming Power Converter under Unbalanced Load Conditions

Table 3

Comparison of two control strategies in steady-state.

Load type	Conventional control scheme				Proposed control strategy
	Load peak voltages (V)			PVUR (%)	Load peak voltages (V)			PVUR (%)
	Phase	Phase	Phase		Phase	Phase	Phase
Balanced	155.32	155.55	155.54	0.096	155.50	155.54	155.56	0.021
Unb. 1	155.25	155.52	155.58	0.128	155.38	155.49	155.56	0.062
Unb. 2	155.15	155.56	155.6	0.184	155.23	155.52	155.75	0.173
Unb. 3	155.55	155.65	155.15	0.192	155.79	155.25	155.45	0.188