Antoher Wind Turbine Question
Antoher Wind Turbine Question
(OP)
I've searched through the posts here, but haven't found an exact answer. I am installing a small 600 watt output wind turbine that will go through an iverter. I don't want to tie into the grid as there is just too much paperwork for that. I'd like to take the 120VAC output of the inverter to a small transfer switch that has the wind turbine as the normal supply and house 120VAC power as the alternate. That output would go to the input of a small UPS(maybe 750va- 1kva). The load I am attempting to drive is a couple of small servers, maybe 300 watts total.
My confusion is what happens when the wind turbine wants to generate more than I need.
My confusion is what happens when the wind turbine wants to generate more than I need.






RE: Antoher Wind Turbine Question
Because there is no governor control, the AC voltage at the output of the wind generator is also uncontrolled and fluctuates proportionally to the speed of the rotor (and by extension, the wind speed). When a load is connected, a back emf is induced that acts counter to the rotor and slows down the turbine. So at full load, you need a certain wind speed to keep the thing going.
Now when there is no load, the wind turbine will be spinning faster at the same wind speed as before. Because the output AC voltage is proportional to turbine speed, the voltage will also rise as the turbine speeds up.
This isn't a problem as long as your rectifier and inverter are operating within their specified tolerances (check with the manufacturer). Also, the turbine should be mechanically capable of some level of overspeed and the stator windings for some level of overvoltage.
In large wind turbines, there is typically some kind of pitch control / assisted stall control / etc which can prevent the turbine from mechanical damage due to high wind speeds. But a 600W turbine will just have to put up with any large gusts... or fall apart or have the windings burnt out.
RE: Antoher Wind Turbine Question
If you could provide an over-voltage switch you would introduce a 2-5 kw resistor in circuit and overcome the hurricane[If the generator could produce 5 kw for a while!].
see for instance:
http://ww
RE: Antoher Wind Turbine Question
RE: Antoher Wind Turbine Question
RE: Antoher Wind Turbine Question
Keith Cress
kcress - http://www.flaminsystems.com
RE: Antoher Wind Turbine Question
Neil
RE: Antoher Wind Turbine Question
RE: Antoher Wind Turbine Question
RE: Antoher Wind Turbine Question
http://www.youtube.com/watch?v=eO3inlC2ZOQ
RE: Antoher Wind Turbine Question
Neil
RE: Antoher Wind Turbine Question
Interesting that if you blink looking at that movie the unit appears to turn backwards or forwards to the eye.
Keith Cress
kcress - http://www.flaminsystems.com
RE: Antoher Wind Turbine Question
If I recall correctly, a good rule of thumb is to place the turbine 30' higher than any obstacles within a 300' radius.
My two bad thoughts looking at the UGE web-site were that I'm not a fan of roof mounts and the main UGE web site makes you jump through hoops to get to any product details. Overall, the web-site makes me think "green chic" where they're more about selling an idea then a good product. Similar to the shady companies selling "power saving" devices or the next "revolutionary" internal combustion engine.