DIY 1KW grid tie?

[BobG]

Assuming I had a 1KW isolation transformer, and a hypothetical inverter
that was programmable and synchronizable, could one drive about a KW
into one leg of the 120? Do the grid tie inverters adjust amplitude on
every half cycle? Are all grid tie inverters sine wave output? Or can
they adjust the width of the 140V pulse to make the power per half
cycle greater than what was on the grid that half cycle?

 

[BobG]

OK, here's a similar question.... if I look in a 500W modified square
wave inverter, do I see a hi freq 12V chopper, a hi freq 500W
transformer, and two 200V half bridges? Is there any sort of amplitude
or pulse width regulation at all, or is it just a big dumb NE555?

 

[Phil Allison]

OK, here's a similar question.... if I look in a 500W modified square
wave inverter, do I see a hi freq 12V chopper, a hi freq 500W
transformer, and two 200V half bridges? Is there any sort of amplitude
or pulse width regulation at all, or is it just a big dumb NE555?

** I see a quite remarkable similarity between this question and the
previous one you posed.

The same old Google Groper stupidity.





......... Phil

 

[BobG]

I see a quite remarkable similarity between this question and the
previous one you posed.
The same old Google Groper stupidity.

=========================
What a memory! I suppose you know exactly what the internal topology
of msw inverters is, but you want to make me look stupid and you smart,
so if I fly off the handle and tell you to get stuffed, you'll come
back with some apoplectic stream of cursing like a sailor with
Tourettes.... so Mr Smarty Phil, do msw inverters have regulation in
them, or do you just want to keep all your info to yourself?

 

[Rich Grise]

Assuming I had a 1KW isolation transformer, and a hypothetical inverter
that was programmable and synchronizable, could one drive about a KW
into one leg of the 120? Do the grid tie inverters adjust amplitude on
every half cycle? Are all grid tie inverters sine wave output? Or can
they adjust the width of the 140V pulse to make the power per half
cycle greater than what was on the grid that half cycle?

If you want to make your meter run backwards, you will have to clear
it with the power company. They have all the answers as to synchronization,
load sharing, phasing, and all that sort of stuff.

Good Luck!
Rich

 

[BobG]

Hi Rich. I'd be happy with it running a little slower. I have this
small system I've set up in case we get another big wind and a power
outage again here in Cen Fla. My curiousity about the technical aspects
is sort of academic... seems like if I can pull 10 amps out of one leg
of the 240, I could push 10 amps back in, and who would know? Isn't it
better to ask for forgiveness than ask for permission?

 

[Phil Allison]

"BobGoogle " <[email protected]>

Hi Rich. I'd be happy with it running a little slower. I have this
small system I've set up in case we get another big wind and a power
outage again here in Cen Fla. My curiousity about the technical aspects
is sort of academic... seems like if I can pull 10 amps out of one leg
of the 240, I could push 10 amps back in, and who would know? Isn't it
better to ask for forgiveness than ask for permission?

** Go ahead - make my day .......

Google Fuckwit !





....... Phil

 

[BobG]

** Go ahead - make my day .......

===================================
I saw that movie... Dirty Harry, right? Hey Phil... know anything about
electronics? want to help me with my project or you just want to
slobber all over the keyboard?

 

[Phil Allison]

"BobGoogle "


** Go ahead, Bob - make my day .......

Post your wacky Q over on "sci.electronics.design ".






........ Phil

 

[jasen]

Hi Rich. I'd be happy with it running a little slower. I have this
small system I've set up in case we get another big wind and a power
outage again here in Cen Fla. My curiousity about the technical aspects
is sort of academic... seems like if I can pull 10 amps out of one leg
of the 240, I could push 10 amps back in, and who would know? Isn't it
better to ask for forgiveness than ask for permission?

If you kill someone who's working on a "disconnected" circuit (but you're
feeding power into it) you may find forgiveness hard to come by.

Bye.
Jasen

 

[BobG]

Thanks for the cautionary warning Jasen. It is duely noted. Now do you
have any technical info on how to modulate the inverter output to send
about 10 amps back up the wire? Does it need to sense and adjust every
half cycle or many times per half cycle?

 

[Phil Allison]

Thanks for the cautionary warning Jasen. It is duely noted. Now do you
have any technical info on how to modulate the inverter output to send
about 10 amps back up the wire? Does it need to sense and adjust every
half cycle or many times per half cycle?

** LMFAO.


This GG LUNATIC is a fair dinkum, bloody SCREAM !!!




...... Phil

 

[BobG]

** LMFAO.
This GG LUNATIC is a fair dinkum, bloody SCREAM !!!

=================================================
Now Phil, try not to get all worked up. You might get an aneurism and
God Forbid not be able to type anymore. It would be a true loss to the
engineers on usenet to not be able to be insulted by a savant such as
yourself. By the way, is your curriculum vitae available online? I'd
like to see if you have really done anything world class in your life
besides win the Aspberger's Trophy for most obnoxious personality on
the entire Australian continent.

 

[Phil Allison]

Thanks for the cautionary warning Jasen. It is duely noted. Now do you
have any technical info on how to modulate the inverter output to send
about 10 amps back up the wire? Does it need to sense and adjust every
half cycle or many times per half cycle?

** LMAO !

This Google Groper LUNATIC is a fair dinkum, bloody SCREAM !!!





...... Phil

 

[BobG]

** LMAO !
This Google Groper LUNATIC is a fair dinkum, bloody SCREAM !!!

===============================
Go Phil! Post it again once more for all to see! The pride of the
Southern Hemisphere!

 

[Phil Allison]

"BobGoogle "


** Go ahead, Bob - make my day .......

Post your wacky Q over on "sci.electronics.design ".

Maybe one of the resident rocket scientists will give you enough half baked
info to electrocute yourself.





....... Phil

 

[BobG]

Maybe one of the resident rocket scientists will give you enough half baked
info to electrocute yourself.

==============================
What a pleasant friendly thought you've extended from down under. I can
imagine how your coworkers look forward to your pleasant repartie
everyday. "Here comes old PottyMouth Phil! Hey Phil! You wished any
Yanks to be electrocuted today? We need more blokes like you to make
the world love us! Keep it up!"

 

[jasen]

Thanks for the cautionary warning Jasen. It is duely noted. Now do you
have any technical info on how to modulate the inverter output to send
about 10 amps back up the wire? Does it need to sense and adjust every
half cycle or many times per half cycle?

Not electronically.

but there is this thing where you drive an induction motor at slightly faster
than the internal magnetic field moves at (normally they run slightly slow)
and it pumps energy back into the power line. I forget what it's called.

Bye.
Jasen

 

[jasen]

===============================
Go Phil! Post it again once more for all to see! The pride of the
Southern Hemisphere!

Phil has nothing on Rod Speed.

Not That I'm particularly proud of either.

Bye.
Jasen

 

[BobG]

but there is this thing where you drive an induction motor at slightly faster
than the internal magnetic field moves at (normally they run slightly slow)
and it pumps energy back into the power line. I forget what it's called.

=============================
Slip? Its caused by ELI the ICE man. But there aint no induction motor
in a cheap msw inverter! Just a chopper to step the voltage up from 12
to 140 and an h-bridge. The fancy grid ties need to sniff the v and/or
i going in and out to stay in sync... somehow..... I bet Phil knows...
but he aint sayin!