Generator

https://en.wikipedia.org/wiki/Excitation_%28magnetic%29

sir if we are going to give some power to the induction generator then what is the purpose of generator???
suppose a generator is in standalone and we dont have any external voltage source, then what will we do to start recieving the output power from that generator?

I bet you haven't read the manual and I bet you haven't rung the supplier either, have you?

I don't know, Mildred. I can't see your installation manual. Did you ring the supplier before coming here, by any chance? I'm not going to do it for you, because that might make you lazy, and we don't want that, do we?

Of course you have to give a generator external power. Perpetual motion is impossible. If you're trying to synchronize the power generation with the the grid then somewhere the generator must be connected to the grid.

All a bottle dynamo on a bicycle requires is something to turn it. Fixed magnets and coils of wire do the rest.

http://www.dieselserviceandsupply.com/How_Generators_Work.aspx

Before anyone can answer your question you have to tell us exactly what size and type of generator you have (synchronous or induction), how the rotating magnetic field is powered (separate/self excitation, permanent magnets, brushless, etc.), whether it is a standalone or grid connected unit, and how it gets its mechanical input power (engine, wind, water, steam, etc.).

You did mention the term Induction Generator (IG), so if this is a wind or mini-hydro system you will need a another source of reliable AC power to provide a frequency and voltage reference. There are other types of IGs but they tend to be installed by knowledgeable personnel.

If you are unsure about the correct answers then you'll need some local expert to help guide you.

Your wording is a bit ambiguous, On the control panel there are two supplies, (1) The external supply necessary for the auxiliaries when starting up a unit, and (2) a supply from your own unit when synchronised with the system. So the answer depends on the intended meaning of your question?

In this forum you can get far better answers if you provide more detail about the problem. Sometimes it is also useful to say what your background is so that answers can be given in technical terms that you may be familiar with.

Are we talking about a serious generator here, say 1 megawatt (MW) or a toy one like on a bicycle putting out as much light as a damp candle?

BAB