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AC Power transmision

Discussion in 'General Electronics Discussion' started by Dezmond, Mar 26, 2013.

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  1. Dezmond


    Mar 26, 2013
    I have a little project where i need to transmit about 1.5kw over 500m into a rectifier and then into an inverter for power generation (to reduce volt drop)

    input voltage is about 230v ish
    my idea was to step up to about 1000v and step down again to around 200v
    i have 10mm SWA allready available in the ground

    any ideas if this can be done low cost ?? and if so where i could get the components

    Thanks D
  2. Harald Kapp

    Harald Kapp Moderator Moderator

    Nov 17, 2011
    In principle you can use simple transformers. But they would have to be biiiiiig.

    Beware: Above 380 V (rms, three phase) new rules come into effect with regard to safety (creepage distances, air gaps, insulation etc.)!

    As I understand it your cable is 3*10mm^2 steel wired armour, right?
    10mm^2 cable has a resistance of approx. 0.00325Ohm/m. 500m to and fro makes 1km, so the total resistance of your cable is approx.3.25Ohm.
    Your load is [email protected] This translates to a resistance of 35 Ohm. Without any additional measures you loose 10% along the cable. Couldn't you tolerate that?
  3. Dezmond


    Mar 26, 2013

    I was hopping for a nice easy answer but nothing is that easy

    The cable is a 2 core using 1 phase
    a drop of 10% is 24v so if i could improve that would be better

    Their is a bit of mis match at the output end, we are using hydro with a 230v AC generator attached. im now upgrading the system and attempting to match a SMA inverter to its output.

    Previously the DC output was tied onto the batteries.
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