Harmonic- transformer
Harmonic- transformer
(OP)
Hi, Folks,
I am doing a harmonic study for a facility using ETAP software.On ETAP transformer editor, there is a harmonic page confusing me, which requires the inputs for 6,12,18 pulse data regarding harmonics. I consulted ETAP. They were saying lighty-loaded transformers generate harmonic, which doesn't make sense to me.To my knowledge, only when transformers are being enegized, they can generate harmonic. Who can guide me to learn more about this?
thank you in advance.
I am doing a harmonic study for a facility using ETAP software.On ETAP transformer editor, there is a harmonic page confusing me, which requires the inputs for 6,12,18 pulse data regarding harmonics. I consulted ETAP. They were saying lighty-loaded transformers generate harmonic, which doesn't make sense to me.To my knowledge, only when transformers are being enegized, they can generate harmonic. Who can guide me to learn more about this?
thank you in advance.






RE: Harmonic- transformer
Mike
RE: Harmonic- transformer
RE: Harmonic- transformer
If This is not ensured (path is not provided for 3rd harmonic curretns), the flux will not vary cosinusoidally and hence the voltage will have 3rd harmonic component at the winding terminals. (you probably know this).
The flux density , core material (CRGO)and core design as also the winding connections effect magnitude of 3rd harmonics. But like someone said this current is very small and hence practically neglected in most cases. There are standards in transformer design where u can calculate these and very well measure these as well.
So 3rd harmonics are inherent to transformers but i woulld not call transformers active 3rd harmonic generators.
Thanks
RE: Harmonic- transformer
RE: Harmonic- transformer
Mike