DC wind generator

oussama1993
oussama1993 Registered Users Posts: 1 ✭
in Caravan, Recreational Vehicle, and Marine Power Systems #1
how i can do modiling for wind genrator with DC output
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  • mike95490
    mike95490 Solar Expert Posts: 9,583 ✭✭✭✭✭
    #2
    This is the politically incorrect answer:
    Dig the deep hole in the ground for the mast.  Place a large # of large bills in the hole, and then fill it in. 

    Then buy solar PV panels and a backup generator for cloudy days.

    In reality, home size wind power seldom works like the ads claim.
    Powerfab top of pole PV mount | Listeroid 6/1 w/st5 gen head | XW6048 inverter/chgr | Iota 48V/15A charger | Morningstar 60A MPPT | 48V, 800A NiFe Battery (in series)| 15, Evergreen 205w "12V" PV array on pole | Midnight ePanel | Grundfos 10 SO5-9 with 3 wire Franklin Electric motor (1/2hp 240V 1ph ) on a timer for 3 hr noontime run - Runs off PV ||
    || Midnight Classic 200 | 10, Evergreen 200w in a 160VOC array ||
    || VEC1093 12V Charger | Maha C401 aa/aaa Charger | SureSine | Sunsaver MPPT 15A

    solar: http://tinyurl.com/LMR-Solar
    gen: http://tinyurl.com/LMR-Lister ,

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  • BB.
    BB. Super Moderators, Administrators Posts: 33,613 admin
    #3
    I don't know of any modeling of Wind Turbines that seems to be accurate to a factor of 1/2 to an order of magnitude off (1/10th) of "predictions" for small wind turbines.

    Here is a link to a thread here, and an study in the Netherlands of a bunch of small wind turbines (published in 2010, and unfortunately, the original study PDF Link is dead). There is some data from the report in the thread, and other sites discussing the results:

    https://forum.solar-electric.com/discussion/3638/small-windpower-a-scam-survey-says-so/p1

    http://theoildrum.com/node/6954 (one article)

    The only turbine that actually out performed the spec sheet (by 155%) was the SkyStream... Which had lots of other mechanical, aerodynamics, and electronic reliability issues.... (lots of unhappy customers at the time)

    https://www.xzeres.com/?page_id=351 (current generation for sale? --Not sure)

    I am still not sure what you are looking for? To design a new/better/etc. turbine? A one-off installation? Install multiple units powering remote equipment? Academic study? Or what.

    For wind turbines, the first issue is site location. Without a good site, a wind turbine is more or less a garden ornament.

    So, the first suggestion is to install an anemometer (weather stationi) (at the height of the proposed turbine) and collect data for 1 year... And see how much wind there really is (and measure turbulence, min/average/max wind speeds etc.).

    You can put the alternator of interest on a variable speed drive, with the intended load (rectifier, battery bank, resistor/electronic load, etc.) and have some nice performance data in a reasonably short time.

    What tends to "miss" in small wind, is the aerodynamic "connection" between Wind and Turbine (blades and alternator). Between "poor wind", turbulent wind, and torque/rpm/wind velocity profile... Too much torque from the alternator, the blades stall. Too little torque, the blades overspeed in high winds. Design of Alternator does not match "tip speed" limits of the blade design, etc....

    For better answers than I can give--This site is hard to beat:

    http://www.scoraigwind.com/
    http://scoraigwind.co.uk/ ("new" home page)

    It is a Do It Yourself source of information. But the education will help understand the issues that the commercial small wind folks have to address too.

    -Bill
    Near San Francisco California: 3.5kWatt Grid Tied Solar power system+small backup genset
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