View License

Download apps, toolboxes, and other File Exchange content using Add-On Explorer in MATLAB.

» Watch video

Highlights from
IEC 61000-4-7 for Harmonics Calculations

5.0 | 2 ratings Rate this file 9 Downloads (last 30 days) File Size: 9.2 KB File ID: #43496 Version: 1.0

IEC 61000-4-7 for Harmonics Calculations


Aubai (view profile)


This file gives you the ability to calculated Harmonics

| Watch this File

File Information

This function will calculate the Harmonics spectrum values according to
the IEC 61000-4-7 Norm which spesify the need for 10 min Voltage and current measured signals of the system under study and calulate the Harmonics mean values every 10 Periods of the measured signal (In this case 50 Hz signal)
This Fucntion inputs are:
1- The nominal values of the measured signal: Frequency,Voltage, and the current. For example f = 50%Hz
Vn = 400%V (Phase to Phase Voltage of the grid)
Inom = 475%A (The nominal current of the system under measurement)
2- The measured Voltages and current signals with there time
measurement signals (U1,U2,U3,I1,I2,I3,U1_time,U2_time,U3_time,I1_time,I2_time,I3_time)
3- figures is an input of 1 or 0 in order to activate showing the figures of the different harmonics spectrums figures calculated in this function.
PS: This function assume that you have the same sampling rate of the different measured signals and that all measured signals has the same length.
The Outputs of this function are:
1- The total Harmonic distortion for your current and voltage signals
2- the K factor of the measured signal. (Look it up in Internet to see the difference between K and THD or try to figure it out from this function)
3- The different spectrum maximum values for the three pahse measured voltages and currents
4- The final three outputs are the x-axis of the spectrum order.

Required Products MATLAB
MATLAB release MATLAB 8.1 (R2013a)
Tags for This File   Please login to tag files.
Please login to add a comment or rating.
Comments and Ratings (2)
27 Jun 2014 RalfMo

RalfMo (view profile)

11 Feb 2014 Obay

Obay (view profile)

finally Harmonics calculation and gruoping according to IEC

Contact us