Re: Wind/PV integration
[RE-wrenches]
Has anybody successfully
implemented a scheme whereby a tower-base control center could accept
imput from a nearby PV array and pass charge current to the batteries
using only one pair of conductors for both the wind and solar charge
sources? Is this a now -and- for-all-time no-input, or an idea worth
pursuing? This situation keeps coming up. Thanks folks---Nick Houser
Off Grid Power.
YES. I didn't combine them at the tower base, but it was same
idea. Give each circuit its own overcurrent protection and disconnect,
then run the PV through an isolation diode. I did this with old Jacobs
DC generator wind machines, so I had to also put an isolation diode in
the generator line so it wouldn't run as a motor. You wouldn't need
that with a modern alternator machine. Of course, you would have to
connect to the DC side of its rectifier assembly.
The combined charge current can be regulated by a shunt system
like the Enermaxer, sized to handle the total current. I'm not sure
what other equipment may be favored these days. With the shunt system,
you send off excess power to burn off as heat. If customer can put
that to use, it's really sweet. I had some customers who dumped to
water heating elements for both DHW and to help warm their greenhouse
soil (on cold windy nights). I used a simple voltage-controlled relay
system that would click on and off frequently. The shunt system
connects in at the battery, with no connection to the junction
point.
I did all this in early 80's when all my wind customers added
PVs. Talk about happy customers!!
Windy
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