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216 Power electronic equipment

Fig. 6.39 Five-level single-phase half-bridge NPC VSC.

Table 6.7 Modes of operation of the five-level single-phase half-bridge NPC VSC

Switching device state Output
voltage
S a1 S a2 S a3 S a4 S a5 S a6 S a7 S a8 v o ˆ v AN
1 1 1 1 0 0 0 0 V dc
0 1 1 1 1 0 0 0 3V dc /4
0 0 1 1 1 1 0 0 V dc /2
0 0 0 1 1 1 1 0 V dc /4
0 0 0 0 1 1 1 1 0