if I am trying to eliminate some harmonics it will also reflect in reducing the THD, so what will be the least possible THD for a 5 level (2 source) multilevel inverter.
Third and Fifth harmonics are predominant. So you should eliminate these harmonics using any one harmonics reduction technique or PWM technique. THD will decrease when compare to previous case.
yes, i agree that, but my question is what will be the least possible THD, 1% 2% or what ?
i have tried using 3rd elimination i got 19.8% is that the least ?
eliminate the lower order harmonics, high order will be eliminated by load(ac motors) and you will get acceptable THD
Its depend on your switching angle. if you can get the best switching angle i think the THD will decreasing. So once you compare the result with the initial value and your result is better, then i think you will achieve the objective.
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