An Optimal Current Controller Design for a Grid Connected Inverter to Improve Power Quality and Test Commercial PV Inverters

Table 2

System configuration acts as a strong grid to test the performance of the SB 1700E inverter under varying the DC voltage.

Number	Actual	Internal resistor of inverter	Reading; Ω	Vdc; (V)	I1; (A)	V1; (V)	P1; (W)	I2; (A)	V2; (V)	P2; (W)	S2; (VA)	Efficiency	P. F
				DC side				AC side
1	31.5	32.3	28	300	4.7	152	727	2.9	229	675	689	0.93	0.98
2	31.0	35.7	28	280	4.2	150	634	2.6	229	590	601	0.93	0.98
3	32.0	35.1	28	260	3.87	136	544	2.2	228	500	510	0.92	0.98
4	31.2	41.5	28	240	3.3	137	451	1.9	228	420	430	0.93	0.98
5	31.1	50.4	28	220	2.7	136	369	1.57	228	340	350	0.92	0.97
6	32.0	68.0	28	200	2	136	278	1.2	228	250	280	0.9	0.89
7	33.8	104.6	28	180	1.3	136	182	0.87	228	160	206	0.88	0.78
8	35.9	214.1	28	160	0.64	137	88	0.6	228	70	140	0.8	0.50
9	0	0	28	140	The inverter switches off