Voted Best Answer
Apr 08, 2015 - 09:31 AM
1) using SHE (Selective Harmonic Elemination) PWM to fire your IGBT/GTO. You can go through any power electronics book as a reference.
2) use of filters (selecting proper filters and components like high pass, low pass, band pass, c-type) e.g.
for a 2nd order high pass filter
Cfilter = (h^2 - 1)* Quality factor/(h^2 * MVA* line to line voltage)
Lfilter = 1/(Cfilter * MVA^2 *voltage^2)
Rfilter = quality factor * sqrt (Lfilter/Cfilter)
where h is harmonic number
quality factor 0.5% to 5%