Calculate THD – Total Harmonic Distortion


I want to know about IEEE 519 Harmonics standards. And Formulas to calculate Total Harmonic Distortion (THD) for Voltage and Current according IEEE standards. Till now i am calculating by taking Square root of the ratio of the sum of the squares of the total harmonics to the fundamental harmonics.

And i am measuring the I THD and V THD by using fluke meter. I want to know how to calculate the THD as per IEEE standards.

Mail from RB

Have a look at these pages .. Total harmonic distortion In power systems, lower THD means reduction in peak currents, heating, emissions, and core loss in motors.

IEEE Std 519-2014 (Revision of IEEE Std 519-1992) – IEEE Recommended Practice and Requirements for Harmonic Control in Electric Power Systems

This document sets the quality of power that is to be provided at the point of common coupling.

Harmonic Currents – Power quality

Power quality used to be to the ability of the electric utilities to provide electric power without interruption. Today, power quality encompasses any deviation from a perfect sinusoidal waveform. This includes EMI and RFI noise, transients, surges, sags, brown outs, black outs, and any other distortions to the sinusoidal waveform.


Spectrum Harmonic Analysis Software

Spectrum harmonic analysis software makes it possible to identify and mitigate harmonic and power-quality problems with a few simple mouse clicks—straight from a dynamic one-line.


Thank you sir,
i ll try to go through the web sites.

Mail from RB

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