On the Reliability of Transformerless Photovoltaic DC/AC Converters Based on Mission Profile

Table 13

Percentage of contribution to the failure rate of the photovoltaic system.

	Inverter failure rate				LCL filter failure rate
Topology	Switches		Diodes	Capacitors	Inductors	Capacitors
	MOSFET	Parasitic diode
Full bridge	97.73%	X	X	X	2.21%	0.06%
Double buck	50.06%	X	48.77%	X	1.13%	0.04%
H5	71.00%	27.67%	X	X	1.30%	0.03%
HERIC	74.61%	24.23%	X	X	1.13%	0.03%
H6	74.61%	X	24.22%	X	1.13%	0.04%
NPC	66.21%	X	32.25%	X	1.51%	0.03%
Virtual DC bus	98.14%	X	X	0.04%	1.78%	0.04%

X indicates that it is not applied for the system.