Wind turbines with many small generators

[Jax Dax]

Im not good at the quotes thing so I hope you don't mind a straight answer.
q1
agreed, but let's keep national grid and home grid separate otherwise the convo gets very confusing
We are talking about wind generators for home use, so let's stay within the house.
q2
every transformation of electrical current suffer hysterisis and eddy current losses, magnetic and resistance losses, approximate efficiency is 80 to 90% so the resultant loss is 10 to 20%. each time electricity flows through a transformer. (its why Edison lost the lighting contract, lol)
Also, why should the generator output be transformed like that? same reason we don't only make 4" nails.
-for example, if your house had 12v lights.
a multi wound generator operating 12/220v - 12v would provide lighting power at 0 losses (technicaly) it is rectified and feed into the batteries with 0 loss, the lights consume it with 0 loss, net effect is you have saved 0.6kW of power generated.
lets assume 1kW of power is used by the lights, 220v transformed to 12v inverted to 220v the 1kW is needed by the lights, the generator must supply 1.6kW @ 220v to have the 1kW output for the lights.
1.6 x 0.8 = 1.28kW to the batteries and 1.28 x 0.8 = 1.02kW supplied to the lights
from the equation you can see a bigger battery bank is needed to power the lights

 

[mfb]

220v transformed to 12v inverted to 220v

Well, no one would do such a thing.

 

[Jax Dax]

http://www.saferwholesale.com/Aero-...IlrY2ChPC11z70VFogXM20cfwmH6GOOrM3BoCparw_wcB
hats the unit Russ was looking at.
the specs provided
Specifications

• Power: 5KW
• Blade Diameter (ft): 20
• Rated Rotated Speed: 200
• Rated Wind Speed (mph): 22
• Max Voltage: 7KW
• Output Voltage: 220v NOTE! TURBINE GENERATION
• Start Up Wind Speed (mph): 6.7
• Operating Wind Speed (mph): 6-55
• Security Wind Speed (mph): 110
• Height Of Tower (ft): 30
• Weight Of Top Section (lbs.): 630
• Output Controller System: Charger Inverter NOTE! CHANGING GENERATOR 220V TO 12V FOR THE BATTERIES
• Capacity & Quantity Of Battery (reference): 12V 200AH 18pcs NOTE! STORAGE OF THE GENERATOR POWER

the 12 /220v Invertor is not included with their system, its an optional extra.
By the way it is normal, all turbines (well most boats etc use a 12v generator) produce a higher voltage, needs thinner cables than 12v

 

[mfb]

By the way it is normal, all turbines (well most boats etc use a 12v generator) produce a higher voltage, needs thinner cables than 12v

Corollary: Conversion losses are lower than losses in cables.
Also, you could put batteries in series to get 220 V (still needs AC/DC conversion of course) if it would help.

 

[Jax Dax]

The picture I am trying to paint is this,
Our electrical system is a Heath Robinson affair, they are antiquated and out dated for the new wave generation equipment we use. All current systems were designed and developed in the 1900s a long time before semi conductors and electronics. We have bound ourselves to the system and struggle to accept the inevitable. The same as the old die hards in there 1950s Cadillac that needed lead fuel. I am not saying the generation or the distribution systems in place are wrong. It is us the home owners that refuse to budge we are bound by institutions who have not kept up with technology, they keep adapting and adapting instead of rectifying the source.
Changing of electricity after your mains supply to any other voltage costs you money, my estimates are between 1 and 3kW of power is wasted per hour in the average house hold every evening, so let's say 4hrs x 1kW = 4kW (using the minimum) x 365.25 = 1461 kW per household per annum 0.4 euro (was the price mentioned I think) 584 euro wasted just in lighting costs wasted. To change just the lighting has a major impact on your bill.

 

[Jax Dax]

Corollary: Conversion losses are lower than losses in cables.
Also, you could put batteries in series to get 220 V (still needs AC/DC conversion of course) if it would help.

Yes that is possible, haven't looked at 220/220 invertors tbh ( never thought of that )
I'm only designing the turbine and generator atm so haven't looked at storage or invertors as yet.