[Vwdiesel] Fw: Power Generation --- ( electrical ) (fwd)

[Val Christian]

Gary,

I was reacting to the understood assertion that one couldn't generate power 
for their own use.  Hence the slightly non-standard, unable to connect 
to the grid parameters.

That's all.

Val

ps: I was only kidding on the DC stuff, although it is somewhat common to
have 12 VDC off grid household systems.  

pps: Certain appliances, refrigerator compressors are a good example, are
very sensitive to actual frequency.


Forwarded message:
> Hmmm,
> 
> Are we talking about a lightly loaded windmill with a strong breeze?
> 
> Windmills attempt to maintain 60hz (well, here in the US) by either
> changing the generator field strength, and/or blade angle. The smaller
> gensets will only adjust the field, the monstrous ones will do both.
> 
> Your 63hz windmill doesn't have enough load to maintain frequency.
> But that doesn't mean that it cannot be connected though.
> 
> Synchronize it with and connect to the grid. Boom! Rock steady 60 hz.
> Why, because the generating capacity of the grid dictates the frequency.
> Your puny (no disrespect intended) windmill does not have enough umph to
> change system frequency.
> 
> Your genset controller, either manually or automatically, will attempt
> to adjust its voltage and frequency. Ideally, as a small generator, you
> want the 'set' voltage slightly higher than grid voltage. Reason is that
> as a generator, you want amps to flow out, not in. This also reduces
> "recirculating" current... VA power which does nothing, compared to
> Watts, real power.
> 
> What really makes your windmill make power is the freq setting. By
> setting the 'set' freq higher than grid, though freq will stay steady at
> 60hz, the phase angle of your generated power will lead the grid phase
> angle. This makes power flow out. On the other hand, you can make your
> windmill a big "fan" by setting the set freq lower than grid.
> 
> Note, when doing all of this, you need to know the Kw and amp limits of
> your machine and adjust your settings accordingly.
> 
> You can run your house on DC! Of course! Why not?
> 
> You would of course need to replace ALL of your appliances with a DC
> powered equivalent. Replace ALL of your outlets with the appropriate DC
> version. In this day and age, I would suspect that it would be cost
> prohibitive to do.  
> 
> -Gary
> 
> 
> 
> On Wed, 2004-04-14 at 10:44, Val Christian wrote:
> > Gary,
> > 
> > So what happens if you generate power at 63 Hz, so that it can't
> > be put on the grid.  How's about running your house on DC?
> 
> 
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