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Re: wind farm ???

Discussion Board - 1 hour 18 min ago
thanks Craig

i used to live in washington state, we relocated back to kansas about 3years ago now.

the proposed project is a 200mega watt farm to be located in marion county kansas.

any info on the 1.7-100 would be helpful.

for the record i am not tryi...

Re: Using the Grid for a Reference Signal to GTI

Discussion Board - Thu, 04/24/2014 - 21:52
Mary he's trying to use the GTI he already has as a stand alone inverter, i missed this bit from the first post.

one way to do it might be to wire up a single or three phase VFD to deliver 120volts at 60 hz. (you'll need an LC filter)
this will form a ...

Re: Using the Grid for a Reference Signal to GTI

Discussion Board - Thu, 04/24/2014 - 17:18
Use a stand alone inverter and  a transfer switch, if the transfer switch has power it goes to inverter, lose inverter it drops back to grid. What is in the barn that is frequency sensitive?

Re: Using the Grid for a Reference Signal to GTI

Discussion Board - Thu, 04/24/2014 - 16:11
thanks mab,

I looked at immersun, and it is expensive. Besides, I do not want to export ANYTHING into the grid, this would violate the grid-tie rules. I just want to use a token amount of grid power to make my reference, only when the grid is up.

BTW, ...

Re: Using the Grid for a Reference Signal to GTI

Discussion Board - Thu, 04/24/2014 - 15:48
the closest I can come to what you want would be to use a device like an Immersun (this is a UK spec device but I assume there might be something equivalent where you are):-

http://www.immersun.co.uk/

then with you...

Re: Using the Grid for a Reference Signal to GTI

Discussion Board - Thu, 04/24/2014 - 15:42
sorry, I missed the frequency-wise syncing in your post, I thought you meant phase-wise syncing.

Anyway, can you still explain this UPS idea in simpler terms?

Re: Using the Grid for a Reference Signal to GTI

Discussion Board - Thu, 04/24/2014 - 15:36
thanks Joe,

I got a nice GTI for real cheap, and it's in the right power range (I do not have a standalone inverter in this power range, and my loads in the barn do not need storage/batteries).
Also, I DO NOT need power synced to the grid, I just need ...

Re: Using the Grid for a Reference Signal to GTI

Discussion Board - Thu, 04/24/2014 - 14:58
so you have excess energy, you want to dump it into AC loads whenever that energy is available. but you also want it to be clean power, synced to the grid.
honestly i don't see a need to do this.
a standalone inverter should work just as well.

the easi...

Using the Grid for a Reference Signal to GTI

Discussion Board - Thu, 04/24/2014 - 14:28
I’d like to wire a battery-less grid-tie inverter (GTI) into my barn, but in a way that it does not put any energy back into the grid, and only powers my local loads and dump loads, and only when the sun is shining (no energy storage).
I have grid conn...

Re: wind farm ???

Discussion Board - Thu, 04/24/2014 - 10:02
Bob, do you know the site name for the proposed wind farm? I believe you live in Washington, is it a continuation of Stateline Wind Farm located on Vansycle Ridge?

I work closely with GE in Pensacola where the 1.7 machine head and hub are manufactured....

Re: 16 volt scooter batteries

Discussion Board - Thu, 04/24/2014 - 00:40
50.93 is fully charged, he may have a different problem.

Re: ATmega328P for OpenTRV use

Discussion Board - Wed, 04/23/2014 - 23:34
I've modified the code to piggyback the room temperature on the transmission that controls the valve, almost for free, and so now I get live monitoring of the whole house.

http://www.earth.org.uk/out/hourly/16WWmultisensortemp.png

This will have a swit...

Re: 16 volt scooter batteries

Discussion Board - Wed, 04/23/2014 - 18:02
you're getting 50 volts....so does it run the scooter at all ?
Just because it has a smart charger doesn't mean the charger is smart 
If it runs the scooter at all how long does it run it before it fades ?
what is the amp/hr rating ?
Norm 

Re: Researching rainwater catchment

Discussion Board - Wed, 04/23/2014 - 17:43
only if you are running the water all the time. other wise you can use it as a btch system, just use a solenoid valve to isolate the water from the unit when off so convection currents don't introduce bugs into the treated side.

even when run constentl...

Re: 16 volt scooter batteries

Discussion Board - Wed, 04/23/2014 - 17:17
they  didn't  freeze, they were sitting in his house.
when he first put then back in the scooter they had no power to even  light up the instrument display
 i put my meter on them and he's getting 50 volts.
i don't think the cells are damaged
just re...

Re: resistive load bank

Discussion Board - Wed, 04/23/2014 - 14:04
I was thinking along what you came up with, parallel strings of heaters. They run cooler than a spring might so less of a fire hazard was my thoughts.

Re: 16 volt scooter batteries

Discussion Board - Wed, 04/23/2014 - 14:02
Yes that can kill a battery when it self discharges and then freezes crushing the plates together and causing shorts.

Re: wind farm ???

Discussion Board - Wed, 04/23/2014 - 14:00
Buffalo Ridge here in MN affects local weather quite a bit, storms split and go around me quite often and the wind farms along it have not changed a thing. Up slope SW side is often wetter in summer and my side is drier. And that is only a 500 foot rise.

Re: wind farm ???

Discussion Board - Wed, 04/23/2014 - 13:33
what is the set back distance from existing residential
that is the key to happy neighbors and a successful  installation .
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