A Novel Power Electronic Inverter Circuit for Transformerless Photovoltaic Systems

Table 1

Operation modes and voltages.

	𝑆1	𝑆2	𝑆3	𝑆4	𝑆5	𝑆6	𝑈an	𝑈bn	𝑈cm
Mode 1	1	0	0	1	0	1	𝑉𝑑	0	𝑉𝑑/2
Mode 2	0	0	0	0	0	1	𝑉𝑑/2	𝑉𝑑/2	𝑉𝑑/2
Mode 3	0	1	1	0	1	0	0	𝑉𝑑	𝑉𝑑/2
Mode 4	0	1	0	0	0	0	𝑉𝑑/2	𝑉𝑑/2	𝑉𝑑/2