Classic Wind Power Curve Editor

Started by keyturbocars, January 20, 2011, 01:13:33 PM

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keyturbocars

For those that plan to use the Classic with their wind turbine (like me), here's a helpful video about the Classic wind power curve editor. 

http://www.youtube.com/user/k7iq#p/u/3/IpslcfvrT6c

Some of you may have already seen it, but I thought I'd post it on the forum for those that haven't seen it yet (and for future reference for new members).

Edward


keyturbocars

#1
boB,

I've watched this video about the wind curve editor a few times trying to think about how I'll set up the curve for my HY-2000 wind turbine.  A few questions/thoughts have come to mind.  Yes, only a few thoughts... any more than that, and my brain might blow a fuse!  :)

On the first point on the graph that determines turbine cut in (at 0A), it appears I should set it a little over battery voltage.  I expect to keep my battery bank in float mode most of the time since it is only used for emergency backup.  As a result, I'd like to keep my battery bank voltage around 53.2V as recommended by Lifeline.

1)  On the graph, should I set my cut in voltage to be a little over 53.2V (say 54V) or should I set it a little over the nominal 48V voltage (say 49V)?

2) If I limit voltage through AUX1 with my "mini-clipper" to 125V (3 phase diversion start at 125V and release at 123V), then should I set the last point on the graph to be 125V since that should be the max voltage?

Based on the Power (W) vs RPM graph and the Voltage vs RPM graphs on my HY-2000 wind turbine, if I limit peak voltage to 125VDC, then I should be right around 750 RPM.  At that RPM, I can see from the power curve that output should be around 3300 watts.  Doing the math, then that should place output current at around 62 A (assuming 53.2V battery bank voltage).

3)  Does that mean I should set the last point on the curve to 62A?  

4)  Since the power curve on the HY-2000 looks fairly linear, then does that mean I can just "connect the dots" between the first and last point on my Classic power curve, and interpolate all the intermediate steps to form a relatively straight line?

If I allow turbine speed to reach 800 RPM, then that would put peak voltage at 132V.  I was just extrapolating a little on the power curve on my HY-2000 turbine, and power output at 800RPM should be close to 3700W.  At a 53.2V battery bank voltage, that should put current right around 70A.  This should still be below the Classic 150's current handling capacity.  I'm basing that from what I've seen from the Classic 150 power curves and imagining what a 130V curve might look like.  That would be about the absolute maximum I'd like to even entertain.  In my mind, 800RPM is the limit I don't want to exceed on this HY-2000 turbine.  I am more concerned about long term reliability and safety, than I am about short term power gains.  So, I might just keep it at 750 RPM to be safe on all fronts.

5)  Would the Classic 150 be "happy" with a 132V max input voltage?     

I know that the current capacity drops as the input voltage curve goes up.

Looking forward to handing control of my turbine over to the Classic!

Edward