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

Table 3

THD of the output voltage, current, and PF of the SB 1700E inverter.

Total harmonic distortion (THD) (%)	300 VDC	200 VDC	160 VDC
Additional inductor
Current	7.4	20.03	47.8
Voltage	2	2.18	2.4
Power factor (PF)	0.994	0.91	0.54
Without additional inductor
Current	5.9	18	44
Voltage	2.4	2.35	2.2
Power factor (PF)	0.996	0.91	0.54