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  1. #1
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    calculate thd

    hi guys,
    i am writing a code for measuring THD(total harmonic distortion) in a three phase power meter.can anyone explain what is THD and upto how many harmonics can be measured ?
    i want measurement upto 41st harmonic

    •   Alt23rd January 2006, 12:04

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    v_c
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    how to calculate thd

    Here's a pretty good definition of total harmonic distortion

    http://en.wikipedia.org/wiki/Total_harmonic_distortion

    The Fluke 430 claims to be able to track up to the 50th harmonic

    http://us.fluke.com/usen/products/features.htm?cs_id=34651(FlukeProducts)&category=P HASE3(FlukeProducts)

    Best regards,
    v_c



    •   Alt23rd January 2006, 20:28

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    Re: how to calculate thd

    Quote Originally Posted by v_c View Post
    Here's a pretty good definition of total harmonic distortion

    Total harmonic distortion - Wikipedia, the free encyclopedia

    The Fluke 430 claims to be able to track up to the 50th harmonic

    Fluke 430 Series Three-Phase Power Quality Analyzers)

    Best regards,
    v_c
    Hello,
    any ideas how to do the same in Matlab ??
    From the frequency response of the FFT, write a script that identifies the harmonics and calculate the THD ....
    Any ideas ?
    Many thanks.
    Stef



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