Harmonics calculation due to electronic motor drive
Harmonics calculation due to electronic motor drive
(OP)
Hi fellows
,
You helped me before, here I go again
Need to calculate/simulate how much voltage harmonics, a motor drive introduce in rest of supply system.
The motordrive is placed near the supplying generator.
Should I use the generator synchronous reactance or subtransient reactance as the supply networks impedance?
,
You helped me before, here I go again
Need to calculate/simulate how much voltage harmonics, a motor drive introduce in rest of supply system.
The motordrive is placed near the supplying generator.
Should I use the generator synchronous reactance or subtransient reactance as the supply networks impedance?






RE: Harmonics calculation due to electronic motor drive
Subtransient reactance (x'') is the one to use. Remember that it is given at 50 (or 60) Hz. So you need to multiply with five, seven etc for the different harmonics.
RE: Harmonics calculation due to electronic motor drive
Mike
RE: Harmonics calculation due to electronic motor drive
Steady state, yes. But not 50 or 60 Hz. You have to think about that to see what it means.
RE: Harmonics calculation due to electronic motor drive
If the current "bumps" are over within the time used for xd'' to change to xd' then I have to use xd'' ??
Will it be reasonable to use xd' or even xd as a worst case calculation?
RE: Harmonics calculation due to electronic motor drive
RE: Harmonics calculation due to electronic motor drive
Mike