[RE-wrenches] Grid-tie hydro

[Jeff Clearwater]

Hey Mark,

Not that would be an advance!  So if the grid 
goes down it doesn't fry the inverter?  And it 
doesn't run away and overspeed and destroy the 
generator/motor or the wheel?  That would be very 
cool.  I should give Derik a call.

Is he still using induction motors as generators? 
Or is this a perm. magnet model?

Best,

Jeff C.
Village Power Design






At 4:00 PM -0600 4/22/10, Mark Dickson wrote:
>I just spoke with Derek at Hi Power and he 
>insists that his LV1500-120V unit can run with 
>no load present and not burn out.  He recommends 
>tying it directly to a PVP inverter with no 
>diversion load-doesn't get much simpler than 
>that!  That is a system that will produce 
>650watts continuous for under $7000.
>
>Btw, the customer has the rights to the creek and is ready to go.
>
>Thanks Dave and Jeff for the lead!
>
>Best regards,
>
>Mark Dickson,
>NABCEP Certified Solar PV Installer 
>Oasis Montana Inc.
>
>
>
>From: re-wrenches-bounces at lists.re-wrenches.org 
>[mailto:re-wrenches-bounces at lists.re-wrenches.org] 
>On Behalf Of Bruce Geddes
>Sent: Thursday, April 22, 2010 2:36 PM
>To: RE-wrenches
>Subject: Re: [RE-wrenches] Grid-tie hydro
>
>SMA use the Windyboy with a rectifier/diversion box for this application.
>
>----- Original Message -----
>From: <mailto:Mark at OasisMontana.com>Mark Dickson
>To: <mailto:re-wrenches at lists.re-wrenches.org>'RE-wrenches'
>Sent: Friday, April 23, 2010 6:04 AM
>Subject: [RE-wrenches] Grid-tie hydro
>
>Hello Wrenches,
>Got one for you. . .
>We have a customer that has great potential for 
>a micro-hydro system and already has the grid on 
>his property.  The obvious way to tie the 
>turbine unit in would be to go back through 
>batteries and a GVFX or XW.  In trying to 
>eliminate the batteries and the inefficiencies I 
>want to look at using a battery-less grid-tie 
>inverter.  I am assuming that I could use a 
>small inverter such as the PVP 1100 and 
>high-voltage Stream Engine.  The problem I am 
>trying to work around is how to divert the 
>~240DC output of the turbine, if and when the 
>grid goes down.  Would this be as simple a 
>placing a relay on the AC side of the inverter 
>and having it switch on/off a large diversion 
>load?
>For the diversion load I was thinking I could 
>just series up a set of water heater elements to 
>get to the necessary voltage.
>
>Has anybody accomplished this before?  Jay?  Are 
>there any other elegant solutions for this?
>
>Has anybody successfully used a WindyBoy with hydro?
>
>Best regards,
>
>Mark Dickson,
>NABCEP Certified Solar PV Installer 
>Oasis Montana Inc.
>
>
>
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-- 
~~~~~~~~~~~~~~~~~~~
Jeff Clearwater
Senior Design Engineer
Village Power Design
Solar Design Consultation for the Commercial Sector
http://www.villagepower.com
gosolar at villagepower.com

Voice: 831-427-2799
Fax: 413-825-0703
245 Dufour St
Santa Cruz, CA 95060
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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