Modeling and Modulation of NNPC Four-Level Inverter for Solar Photovoltaic Power Plant

Table 2

Switching states and common mode voltage of four-level NNPC inverter.

Common mode voltage	Switch states
−VDC/2	000
−7 VDC/18	001, 010, 100
−5 VDC/18	002, 011, 020, 101, 110, 200
−VDC/6	003, 021, 012, 030, 102, 111, 120, 201, 210, 300
−VDC/18	013, 022, 031, 103, 112, 121, 130, 202, 211, 220, 301, 310
VDC/18	023, 032, 113, 122, 131, 203, 212, 221, 230, 302, 311, 320
VDC/6	033, 123, 132, 213, 222, 231, 303, 312, 321, 330
5 VDC 18	133, 223, 232, 313, 322, 331,
7 VDC/18	233, 323, 332
VDC/2	333