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Author Topic: power loss  (Read 1632 times)
djmc
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« on: August 21, 2006, 09:46:21 PM »

Hi I am intrested in putting a small wind turbine on a hill behind my house
I think its a good site with average wind speeds of nine m/s but the top of the hill is 600 meters from the house and battery bank
would I loose too much power on 600m of wire or would it help to bring it down in ac current and change it to dc at the house
Sorry if these are silly qustions but i am a newbe to this and not very good at maths thanks.
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chaso
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« Reply #1 on: August 21, 2006, 10:19:11 PM »

The higher the voltage the further the distance you can run the wires, so it would be better to build a small shed at the bottom of the wind turbine to house the batteries and inverter so you then run the wires at 240v to the house.

Can anyone confirm this. Also somewhere on the forum I think Ivan has mentioned he has a wire loss calcultor for this.

Hope this helps.

Chas.
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mtimm
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« Reply #2 on: August 22, 2006, 07:19:21 AM »

Yes the higher the voltage the better when it comes to distance.

For the same power higher voltage means lower current which means smaller wire can be used

P=IxV where P is power I is current and V is voltage

1000 watts @ 24v is 1000/24 = 41.67 amps

1000 watts @ 240v is 1000/240 = 4.17 amps

Depending on what size turbine you plan to fit the wire could still be expensive even at 240v
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mtimm
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« Reply #3 on: August 22, 2006, 07:27:04 AM »

There was some discussion on wire size here

http://navitron.org.uk/forum/index.php?topic=99.msg502#msg502
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