Windmill

[Rodney Kelp]

With wind speeds from zero to tornado, how do windmills maintain voltage and
more importantly frequency when hooked up to a grid? If they put out 3 phase
there must be a phase sync problem.


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[Art]

Governor as per speed control and adjustable pitch props, DC output into a
DC to AC Converter that automatically adjusts the phase and voltage output.
Otherwise they would either physically destroy themselves and the internal
gear train when over revved by extreme winds, etc and of course, if the
voltage output were dependent on the rpms of the prop shaft, that too would
vary immensely.
"Rodney Kelp" <rodneykelp605@hotmail.com> wrote in message
news:C6KdnZAscfxp2FPdRVn-hQ@adelphia.com...

With wind speeds from zero to tornado, how do windmills maintain voltage
and
more importantly frequency when hooked up to a grid? If they put out 3
phase
there must be a phase sync problem.


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Checked by AVG anti-virus system (http://www.grisoft.com).
Version: 6.0.690 / Virus Database: 451 - Release Date: 5/22/2004

 

[Richard The Troll]

On Sat, 11 Dec 2004 21:50:56 +0000, Peter Lawton wrote:

"Rich Grise" <rich@example.net> wrote in message
newsan.2004.12.11.08.03.57.609592@example.net...
On Sat, 11 Dec 2004 07:33:31 +0000, Lord Garth wrote:


"hotkey" <adennel@jeack.com.au> wrote in message
news:41b9a782_1@news.iprimus.com.au...
they change the angle of the wings, untill unsafe when they switch off
altogether


Long ago, Popular Science had an article about a system that corrected
for
this
problem. Sorry I can't quote when. I believe it used a slip ring in a
novel way.

Variable-pitch props have been almost routine for quite some time. But if
you're running a windmill, is it "correct" to call the turbine blades a
"prop?"

Thanks,
Rich
And being equally pedantic, if they aren't milling then are they mills?

Peter

It depends on what the definition of "is" is. I looked it up. It said,
"see 'be'". "see be"? Seabee? CB? C.B.DeMille? See, be de Mill?

Eerie!

;^j
Rich

 

[Peter Lawton]

"Richard The Troll" <rtt@example.net> wrote in message
newsan.2004.12.12.10.45.52.815635@example.net...

On Sat, 11 Dec 2004 21:50:56 +0000, Peter Lawton wrote:


"Rich Grise" <rich@example.net> wrote in message
newsan.2004.12.11.08.03.57.609592@example.net...
On Sat, 11 Dec 2004 07:33:31 +0000, Lord Garth wrote:


"hotkey" <adennel@jeack.com.au> wrote in message
news:41b9a782_1@news.iprimus.com.au...
they change the angle of the wings, untill unsafe when they switch
off
altogether


Long ago, Popular Science had an article about a system that
corrected
for
this
problem. Sorry I can't quote when. I believe it used a slip ring in
a
novel way.

Variable-pitch props have been almost routine for quite some time. But
if
you're running a windmill, is it "correct" to call the turbine blades a
"prop?"

Thanks,
Rich
And being equally pedantic, if they aren't milling then are they mills?

Peter

It depends on what the definition of "is" is. I looked it up. It said,
"see 'be'". "see be"? Seabee? CB? C.B.DeMille? See, be de Mill?

Eerie!

;^j
Rich

You are going round in a circle, finding wheels within wheels.
As is well known, everything returns to milling eventually if you mull over
it long enough.
Even our word for distance comes (possibly) from the statutory Roman minimum
distance
between mills (so they wouldn't steal each other's wind). And a 'League' of
course was three mills.
The last mill was always the longest because it had to take the least windy
position and so needed
bigger sails.

Peter
>

 

[Active8]

On Sun, 12 Dec 2004 17:51:05 GMT, Peter Lawton wrote:

"Richard The Troll" <rtt@example.net> wrote in message
newsan.2004.12.12.10.45.52.815635@example.net...
On Sat, 11 Dec 2004 21:50:56 +0000, Peter Lawton wrote:


"Rich Grise" <rich@example.net> wrote in message
newsan.2004.12.11.08.03.57.609592@example.net...
On Sat, 11 Dec 2004 07:33:31 +0000, Lord Garth wrote:


"hotkey" <adennel@jeack.com.au> wrote in message
news:41b9a782_1@news.iprimus.com.au...
they change the angle of the wings, untill unsafe when they switch
off
altogether


Long ago, Popular Science had an article about a system that
corrected
for
this
problem. Sorry I can't quote when. I believe it used a slip ring in
a
novel way.

Variable-pitch props have been almost routine for quite some time. But
if
you're running a windmill, is it "correct" to call the turbine blades a
"prop?"

Thanks,
Rich
And being equally pedantic, if they aren't milling then are they mills?

Peter

It depends on what the definition of "is" is. I looked it up. It said,
"see 'be'". "see be"? Seabee? CB? C.B.DeMille? See, be de Mill?

Eerie!

;^j
Rich

You are going round in a circle, finding wheels within wheels.
As is well known, everything returns to milling eventually if you mull over
it long enough.
Even our word for distance comes (possibly) from the statutory Roman minimum
distance
between mills (so they wouldn't steal each other's wind). And a 'League' of
course was three mills.
The last mill was always the longest because it had to take the least windy
position and so needed
bigger sails.

We've got some serious (albeit interesting) wind going on in this
sub-thread

--
Best Regards,
Mike