Best Switching Angles to Obtain Lowest THD for Multilevel DC/AC Inverters
The lowest THD of multilevel DC/AC inverters from 3-level to 81-level is derived in this chapter. This kind of multilevel DC/AC inverter can be applied in renewable energy systems, electrical vehicles, and other industrial applications [1,2].
Multilevel DC/AC inverters have various structures and many advantages. Unfortunately, most existing inverters are unable to produce good output AC waveforms because of their poor total harmonic distortion (THD) because each level switching angle is not carefully arranged. In order to gain good power quality (PQ), we have to carefully investigate the switching angle arrangement to obtain the lowest THD.
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