how to calculate total harmonic distortion

    • phuonganhlovely.me

      Hello evreyone 

      i using below formula to calculate the THD.

      the plot i get from perform FFF in EDT

      can you tell me that my calculation is correct ?  

      every collum i draw v1, v2, v3 ...in the fig is harmonic order. (i am not sure)  can you help me explain ?

      if i want to display 10 harmonic order i need to total 10 value continously (ex: 1,2,3,4,5,6...)or just choice the harmonic that i want for example (1,3,5,7,10..) and then calculate it 

      thank you very much.


    • Howard
      Ansys Employee

      Hello phuonganhlovely.me,

            We would use above equation to calculate THD with v1, v2, v3, v4,...,vn .




    • phuonganhlovely.me

      Hi HDLI 

      thank you for your reply.

      how can i get the value of V1,V2,V3.....?

      and how many harmonic can i get from plots? also how to choice the hamornic to perform FFT graph?

      i a newbeis so im not clearly sorry for this inconvenient

      best regard.

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