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Forum Index : Windmills : High Voltage F&P System

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marcwolf

Senior Member

Joined: 08/06/2009
Location: Australia
Posts: 119
Posted: 03:09am 09 Jun 2009
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Hi.
I am planning to get an Ecovations 1KW PV system installed. As they provide a 2KW invertor that gives me the ideal base to add on either additional solar cells, or a wind generator.

I have posken to the installer re the system and it seems that they wire the solarcells in series to give about 200V DC into the invertor.

Now I have 2 options.

1. Ask them to wire the system up as a 48V system and then add a F&P 48V F&P Wind generator

2. Leave the standard installation at 200V and modify the F&P to put out 200V.

Any suggestions folks?. I am quite comfortable with electrical and electronics concepts - but I would rather know if someone has trodden this path before me so I do not make the same mistakes :>

Many thanks
Dave
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AMACK

Senior Member

Joined: 31/05/2009
Location: Australia
Posts: 184
Posted: 04:46am 09 Jun 2009
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I am doing the same sort of thing, only my system is 1050 watts of panels with a Latrinics 1200 PV inverter. My plan was to connect the panels and the wind gen into it together Even if the sun shines and the wind blow the system will not over load as the Inverter will only take in what it can use. I was going to up grade the inverter to a Latronics 2500 watt ( 96 volt) but after talking to Will at latronics i changed my mind and am going to stay with the 1200 (48 Volt). He said that if i use a tc48 turbine controller the Inverter will tell it to shut down the turbine if it is not needed. Then at night when the panels are down and the wind blows the wind gen will kick in.. With luck.
Andy.
*Note to self

1. Make it thick

2.Make it heavy.

3.Make it stronger than it should be.

4. Don't rush the first job as the second job will cost more and take mor
 
marcwolf

Senior Member

Joined: 08/06/2009
Location: Australia
Posts: 119
Posted: 09:46am 09 Jun 2009
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Hi Andy
Thanks for the feedback re the TC48. A VERY nice unit that will work very nicely with a wind generater.

Not sure what inverter I will be getting but the TC48 should work with any 48V input unit.

Also - it solves a lot of niggly issues like overspeed etc.

Many thanks
Dave
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GWatPE

Senior Member

Joined: 01/09/2006
Location: Australia
Posts: 2127
Posted: 01:29pm 09 Jun 2009
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Take care with the tc48. The F&P is traditionally overdriven by the blades. The tc48 works better with chinese PM type windmills. My F&P, cannot be successfully electrically braked in a storm. The tc48 will protect the battery, but not necessarily brake the windmill.

The tc48 disconnects the load, before connecting the brake. It then disconnects the brake and then reapplies the load. It is possible that with a F&P type windmill that when the brake is removed, and the mill is still spinning in reactance limited mode, that before the mill is reconnected to the load, that the voltage could rise high enough to damage the mosfet switches. I am not sure if Latronics has the perfect controller yet.

Gordon.
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marcwolf

Senior Member

Joined: 08/06/2009
Location: Australia
Posts: 119
Posted: 01:48pm 09 Jun 2009
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Hi Gordon
Yes - overspeed is one of the area's that I am working on solutions.
One idea I have is to modify a motorcycle disc brake system so to slow down the blades. If the controller detects overvoltage and disconnects from the turbine - then the brake is applied.
The reset mechanism could be manual (push buttton) or timed say 30 mins before release. If the system spins up again too much then the controller will just disconnect again.
The hydralic piston could be activated by a solinoid - power on - brake off.

Anyway - back to work..
Take Care
Dave
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marcwolf

Senior Member

Joined: 08/06/2009
Location: Australia
Posts: 119
Posted: 01:05pm 10 Jun 2009
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Hi Gordon
I'd like to have a chat with you re your work on voltage doublers etc.
Basically I will need to make a decision soon re my solar installation.

Basically there is some wind in our area but not a gale etc. So I will be looking at something that produces the best output at lower speeds but can handle higher speeds.
So - my decision is this.. 12V/24V/48V configuration. What is the best, and how one of the capacitor systems would help.

Yours very confused...
Dave
Coding Coding Coding..
Keep those keyboards coding..
RAW CODE!!!!!
 
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