but actually first i want to simulate on computer, the different output of 2 or 3 winmills connected in series, i.e.
1. what distance should be there in between them,
2. how much energy losses will be there,
3. what the practical amount of power available after connecting those in series, n many more...
This research paper probably applies to what you're trying to do:
http://pof.aip.org/resource/1/phfle6/v22/i1/p015110_s1?isAuthorized=noYour remark about 'power available after connecting those in series' makes no sense to me. If you mean by 'connecting in series' electrical connections, then you're barking up the wrong tree. If you mean 'aerodynamically in series', i.e. one turbine behind the other, then I shudder at the thought. You won't find any simple equations.... Or if there are simple equations, solving them will be 'interesting'. Think 'non-linear dynamics interesting'. Probably the only sensible approach uses numerical methods of solving, i.e. simulation. There's very good fluid mechanics/aerodynamics software around, no doubt. How to reliably model such a situation, though, I have no idea of.
or if any1 tells me the exact formula for finding out the practical voltage output of connecting 2 or 3 windmills in series.
The person that can tell you the exact formula for that should also be able to give you the exact formula for a long and happy life.....
(BTW, I hope that with 'practical voltage output' you really mean 'practical power output'..... and with 'in series' you mean 'aerodynamically installed behind eachother'.....; if you didn't mean that, you will have to do a whole lot of study first before you know what are the right questions to ask.... )
Finally, this is a DIY forum. Few people here have windfarms.... so no need for people here to solve this optimization problem..... Some of the bigger windfarm manufacturers have probably worked out models for this, but I strongly doubt whether they'd be publicly sharing that kind of knowledge.....
Not to say that it's not an interesting problem. There's a lot of money involved in larger wind projects, and optimizing the use of scarce resources makes sense. If you can work out the problem, you're probably set for life with a big steady income as a windfarm consultant....