third armonics on asincronous generator
third armonics on asincronous generator
(OP)
Two months ago a asincronous machine 1 MW come to my office and get the star cable burn, only this cable burns as a fuse...
Now is on the power plant a little hydro site, and I measure armonics and I find that theres is a high level of armonics thrird one, but I don´t know where they are coming from.. cause I sincronize with the grid the generator and without capacitors I got the same level of current through the neutrl point... and there´s nothing else, a transformer with delta conection on primary, cause current is not coming from the net. I think. does somebody know where this armonics grouws up
Now is on the power plant a little hydro site, and I measure armonics and I find that theres is a high level of armonics thrird one, but I don´t know where they are coming from.. cause I sincronize with the grid the generator and without capacitors I got the same level of current through the neutrl point... and there´s nothing else, a transformer with delta conection on primary, cause current is not coming from the net. I think. does somebody know where this armonics grouws up





RE: third armonics on asincronous generator
Try disconnecting the neutral.
respectfully
RE: third armonics on asincronous generator
RE: third armonics on asincronous generator
The source of third harmonic is intrinsic to the induction generator. Since the air gap is constant around the rotor and stator bore, the Poles flux density distribution around the air gap is close to a square or rectangular wave. That type of wave generates a high content of 3rd harmonic (see Fourier Series for non-sinusoidal waves h
RE: third armonics on asincronous generator
RE: third armonics on asincronous generator
RE: third armonics on asincronous generator
Solutions may include, rewind/replace the generator with 2/3 pitch windings or add reactors in the neutral circuit. Reactor in neutral can be added only if all the loads are 3-wire, not requiring line to neutral connection.
RE: third armonics on asincronous generator
RE: third armonics on asincronous generator
respectfully
RE: third armonics on asincronous generator
RE: third armonics on asincronous generator