Multiple Wind Turbine (3 Phase) to load 10kw 240V Home

Zeak,

Guessing you are somewhere around George Town Malaysia??? ...

In general, #1 will not work. You need to control each wind turbine separately (some sort of "black box" that monitors RPM, voltage, and current for an individual turbine).

The controller "adjusts" the current it draws (higher current, lower RPM (Revolutions Per Minute) and voltage; lower current, higher RPM and voltage). It is looking to "solve" the equation Pmax-power=Voltage-max-power * Current-max-power.

And, the controller generally adjusts the current to control RPM (an unloaded horizontal axis wind turbine can easily overspeed and self destruct in moderate wind).

Also, the controller (may) have the ability to draw a "dead short" on the turbine to shut it down for service or in high wind.

#2 will not work either--Again, each turbine needs its own controller.

#3 could work--Each controller monitors/runs "its own turbine".

Now--We really need to get back to better understanding your energy needs/usage. In general, wind turbines need a constant load to prevent them from overspeed and self destructing. Either a constant load (like a water pump) or a "fixed load" like a battery bank with a "dump load" (typically an electric heating element/unit that turns on when the battery is "full")--To keep the turbine under control.

As our friends above said, wind power is highly variable and you either need to accept the variability (water pumping is a great variable load--When light wind, the pump turns at low RPM, and when the wind is heavy, the pump turns at high speed).

But, for running a turbine directly to a home (lights, refrigerator, computer, etc.)--Not really a very good energy source.

While it is possible to use AC Utility Power as your "load" (think of the AC utility grid as a "giant" AC battery bank--It holds 240 VAC and 50 Hz no matter if you are drawing power, or feeding power backwards through your utility meter, to "charge" the "grid")--But in your case, you are "off the grid" (not utility power)?

So--In your case--If you need "stable power" (when the wind is not blowing, sun is not shining), you generally would use a large bank of batteries to supply your home's energy. And when the wind blows, or the sun shines, your energy sources both supply your loads and charge the battery bank at the same time.

And to be honest--Personally, I do not recommend wind power as your primary source of energy... For most people, there is simply not enough wind when they need the energy--And Wind turbines, while not very expensive, the 10+ Meter tall tower to support the turbine, the concrete foundation, the electronics, and equipment needed to install and service the turbine (once a year +/-), generally make wind turbines the sort of thing you install after you 1) battery bank, 2) backup diesel genest, 3) solar panels, and 4) wind turbine(s) for use during poor weather.

Assuming that you are somewhere in Malaysia (or similar) with good weather/sunlight/no major shading, I would highly suggest that you look at solar panels + battery bank + AC inverter to supply your power.

http://www.solarelectricityhandbook.com/solar-irradiance.html

Using the above link, it appears that you may get a minimum (long term average) of ~4.5 to 5.0+ hours of sun per day. That is really good for solar power (and solar power is usually much more predictable than periods of high wind).

If you can live with "variable" amounts of energy (lots in the middle of the day, none at night)--Such as Water Pumping--Then solar panels + VFDs (variable frequency drives and 3 phase motors) has been very popular in the last few years. Not using a battery bank saves lots of money and maintenance costs (new batteries every 3-5 years in hot climates).

Please note that a 10 kWatt Wind or Solar power system is not "small". You are approaching the point where you "should" hire a company that has successfully installed systems similar to what you need (check references--There are folks out there with a good sales pitch, but poor results).

Anyway, I will stop here... Hopefully you can tell us more about your (approximate) location and details about your energy needs.

-Bill

Ok... Different.

As a start, here is person that pretty much built his own home made hydroelectric power plant in Chile (south America):

If you run your turbines to a battery bank--That will give you a "base load" that can help keep the turbines at roughly the correct RPM. And you can use a dump load (electric heater) and some automatic valving to keep the turbines at the correct RPM.

The other is to go direct to an AC generator (phasing 2 or more gensets in parallel) is certainly possible--But if you are OK with battery bank+AC inverter, dump loads, and/or (automatic) frequency control--It would probably be easier.

I am going to stop here--Simply because I do not know what is done in the "small hydro" installations (I live in California where we have 5 years of drought and 3 years of rain--And heavily controlled waterways/water rights which make small hydro pretty difficult). Add the present regulations for Dams--That is a pretty tough road to follow here.

A 10 kWatt off grid power system is not small... If you need that much energy and have enough water flow to do that--Wonderful.

Have you looked at conservation and see if you can reduce your energy needs (and the cost of the system needed to generate that much energy)?

-Bill