What is the exact formula for theoretically calculating THD? What does an increase in zeroth harmonics indicate?

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Punit Kumar

THD=((V22+V32+V42+....+Vn2)1/2/ V1)*100%

Sheela Sobana Rani

Total harmonic distortion is the summation of all harmonic components of the voltage or current waveform compared against the fundamental component of the voltage or current wave.

Pradeep Balaji

Hi Punit Kumar

Can you plz abbreviate (V1.........Vn)....?.. what values must be taken for the substitution in this formula?

(V1.........Vn). are harmonic components of the voltage waveform.