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From: "Badri Pattabiraman" <badri.spec@gmail.com>
Newsgroups: comp.soft-sys.matlab
Subject: Re: Dynamic Model of a Synchronous Generator
Date: Fri, 13 Nov 2009 16:37:03 +0000 (UTC)
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"Frank W." <yohansan@web.de> wrote in message <hd8t10$s1l$1@fred.mathworks.com>...
> Hello,
> 
> > In SimpowerSystems, there exist a model for Synchronous machine. But this exist as a single block. I would like to know the details behind this single block. What is basic model on which this block works.?
> > 
> In order to get the detailed model of the synchronous machine block you select the model block (left click) and then right clicking on it. A Menu will pop up. In this menu you select the command 'Look under Mask'. This will open another Simulink Window in which the masked subsystem is displayed. In this window you can double click on the electrical and mechanical subsystems to have the implementation of the equations in dq reference frame.
> 
> > I have collected the necessary technical datas for the Generator in dq reference frame and also aware of the dynamic equations. But how to model this to get electrical power as output? If somebody can throw some light on this modelling, it would be really great. Also any references and links are welcome.>
> The actual electrical power output (real/active power and reactive power) will depend on the load (including other plants and maybe an electrical grid) attached to that model. In case of a more complex system (i.e. not a simple RLC load but other AC machines, compensator circuits, other synchronozs machines) many more equations must be solved know as the 'load flow' calculation. The input to the synchronous mchine model is either rotational speed or active power by a turbine or motor rotating the shaft. 
> 
> For modelling synchronous machines I found the book 'Dynamic Simulation of electrical machines using Simulink' by C.M. Ong helpful. You find some the models under 
> http://www.mathworks.com/matlabcentral/fileexchange/9941-dynamic-simulations-of-electric-machinery-using-matlabsimulink
> Also the book 'Power System Stability and Control' by P. Kundur might be of help when modeling electrical power systems.
> 
> Kind regards
> F.W.


Hallo Frank,

Thanks for the reply. I am able to explore the model now. I am going to have Grid along with other Generating station on the my load side. That should make things llittle bit complicated. Anyway I also want to know if the process of Synchronisation can be simulated here. When the Generator operates in Island operation, its not yet conencted to grid. When the synchrnonization takes place, load flow happens. Is it possible we simulate both Island operation and operation with grid using the same model?

Thanks and Regards,
badri