Windfarm Power Systems Model

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samer12345 Member Join Date: Feb 2011 Posts: 6	Windfarm Power Systems Model 02/03/2011 6:19 PM
	Hello everyone, I am new here and I really really need someone's help. I am studying the operational issues that could arise when connecting a windfarm to the grid. I have drawn a circuit model and it is the one I will use for the study. I am stuck with the circuit analysis. I need to derive the state space equations in order to get the system matrix from which I can study the stability by finding the eigenvalues. Once I have derived the equations I can do it myself using MATLAB but I need someone to help me with the equations PLEASE. The voltage source on the left hand side represents an infinite bus at 33 kV and 50 Hz. I am only interested in what happens on the right hand side ie distribution level. I need the voltages across the resistors to be the outputs and voltages across the capacitors and currents across inductors to be state variables. I only need the equations i can derive the matrices. Reply as soon as possible. I can't figure out how to attach the circuit. Please reply to either tell me how or to send via e-mail. thanks a lot
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lyn Guru Join Date: Oct 2008 Posts: 42355 Good Answers: 1693	#1 Re: Windfarm Power Systems Model 02/03/2011 6:39 PM
	Would it be OK with you if I copied this:" I need to derive the state space equations in order to get the system matrix from which I can study the stability by finding the eigenvalues"? And use it myself? This is as soon as I could reply. Just tell me if it's OK, soon.
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samer12345 Member Join Date: Feb 2011 Posts: 6	#5 In reply to #1 Re: Windfarm Power Systems Model 02/04/2011 1:28 PM
	Lynlynch of course you could are you doing a similar task? i worked on it today and I think i'm almost there but i am not sure since it gives a big matrix, so please if you find anything post it here, then we could compare :)
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Anonymous Poster	#6 In reply to #5 Re: Windfarm Power Systems Model 02/04/2011 6:41 PM
	I have a horrible feeling that your eigenvectors are going due south.
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JohnDG Guru Join Date: May 2006 Location: Reading, Berkshire, UK. Going under cover. Posts: 9684 Good Answers: 468	#2 Re: Windfarm Power Systems Model 02/03/2011 7:19 PM
	The sooner you figure out how to post an image of your circuit, the sooner someone here can start figuring out what's on the left or right, and trying to help you. Not many psychics here. [hint: try searching CR4 for how to post images] __________________ "Love justice, you who rule the world" - Dante Alighieri
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samer12345 Member Join Date: Feb 2011 Posts: 6	#3 Re: Windfarm Power Systems Model 02/03/2011 7:30 PM
	for some reason it didn't work on Chrome, thanks for the link
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MoronicBumble Guru Join Date: May 2010 Posts: 570 Good Answers: 55	#4 Re: Windfarm Power Systems Model 02/04/2011 1:24 PM
	I can't figure out how to attach the circuit. I'm thinking that some very large, well-insulated cables might work. I am studying the operational issues that could arise when connecting a windfarm to the grid. As far as operational issues, I think you would want to make sure that the grid does not feed the windfarm, converting the windmills into large fans. When you connect the cables, wear protective equipment. Arc blast can blow you right off your step ladder. __________________ Si hoc signum legere potes, operis boni in rebus Latinis alacribus et fructuosis potiri potes!
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ormondotvos Power-User Join Date: Jan 2010 Location: Atchison Village Posts: 383 Good Answers: 39	#7 Re: Windfarm Power Systems Model 02/05/2011 1:56 AM
	Where's your sync circuit? __________________ Align culture with nature...
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PFR Guru Join Date: Nov 2010 Location: Virginia, Georgia, Idaho Posts: 1079 Good Answers: 30	#8 Re: Windfarm Power Systems Model 02/05/2011 11:15 AM
	Another caution! Be very careful when plugging the massive power strip, with it's thousands of duplex receptacles, into the output cables. It can throw a mean arc, which will surely give you a jolt. __________________ PFR Pressure busts pipes. Maybe you need better pipes.
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cwarner7_11 Guru Join Date: Dec 2006 Location: Panama Posts: 4273 Good Answers: 213	#9 Re: Windfarm Power Systems Model 02/05/2011 11:40 AM
	Have a look at ATP-EMTP. It may provide you the modeling environment you are looking for. Also, refer to my blog on this package.
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Anonymous Poster	#10 Re: Windfarm Power Systems Model 02/07/2011 4:01 PM
	I am afraid I have forgotten my Quantum Mechanics and E&M 3 (electromechanics 3). On a practicle note, please get a licensed electrician. It would be a shame if you were feeding power into the grid and fried an unsuspecting lineman who thought he had a de-energised circuit. Might eat your generators too.
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Anonymous Poster (2); cwarner7_11 (1); JohnDG (1); lyn (1); MoronicBumble (1); ormondotvos (1); PFR (1); samer12345 (2)

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