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Wind Turbine Cable Sizing

Comments

  • #2
    00MARTZ00
    Registered Users, Registered Users 2 Posts: 195 ✭✭00MARTZ00


    im not 100% because im still in college but would it not be the same as cable sizing for anything? or is there something extra to take into account?


  • #3
    Tidyweb
    Registered Users, Registered Users 2 Posts: 402 ✭✭Tidyweb


    I dont even know how to do that.

    say its to run 100m 150m and 200m.

    Is there an equation


  • #4
    pieface_ie
    Closed Accounts Posts: 301 ✭✭pieface_ie


    Its rated power is 225kW

    So I = P/V x p.f x 1.73
    I = 225000/400 x 0.83 x 1.73 = 391A ( as confirmed in the specifications )

    The size of the cable will be dependent on a installation method ( underground ), the length of the cable run and the type of conductor been utilized.

    Most likely you will use Armored PVC-Insulated cable with copper conductors.

    A 185mm 3 core SWA carrying a load of 391A over 100 meters will have a volt drop of 12.5v, this is within the 4% allowance (16v)

    Voltdrop = Ib x Length x mv/A/m /1000

    A 200 meter you would need to parallel two cables i recon as the volt-drop will exceed the allowance even if you used a 300mm cable.

    **volt-drop figures used are for install method B, installing a cable underground is install method H, i dont think volt-drop for method H is in the regulations or does anyone know whats used?


  • #5
    Tidyweb
    Registered Users, Registered Users 2 Posts: 402 ✭✭Tidyweb


    Its a 200m run - would you really need 2 cables?

    Thanks for all the information.


  • #6
    Tidyweb
    Registered Users, Registered Users 2 Posts: 402 ✭✭Tidyweb


    Its a 200m run - would you really need 2 cables?

    Thanks for all the information.


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  • #7
    Turbulent Bill
    Registered Users, Registered Users 2 Posts: 1,641 ✭✭✭Turbulent Bill


    What's the background to this - college project?

    Would the cable sizing not be specified by Eirgrid (or whoever is managing the grid connection)?


  • #8
    pieface_ie
    Closed Accounts Posts: 301 ✭✭pieface_ie


    Its a 200m run - would you really need 2 cables?

    Well the volt-drop over a 200m distance will exceed the 4% permissible allowance.

    You could transform the voltage up at source to transmit it to its destination and transform it down again on the other end (you can use much smaller sized cables then) . But this is really is going to add more costs to the project.
    ould the cable sizing not be specified by Eirgrid (or whoever is managing the grid connection)?

    I don't think this is the case, but i stand to be corrected.
    What's the background to this - college project?

    Is this a college project or what are you trying to achieve?


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