Voted Best Answer
Apr 08, 2015 - 09:31 AM
There are two methods to eliminate specific harmonic frequency:
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%
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%
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I have the same problem Please if you solve it share it. or Also share your model I would like to see and figure out.
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Hasan if you have time please take a look in ur facebook inbox. Thank you for your comment...
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