Harmonics in electrical installations: what are they, how are they measured and analyzed?

In this video we are going to study what harmonics are and what loads generate them. We are going to see the concept of linear and non-linear load. I will introduce the basic tool for the analysis of harmonics, that is, the Fast Fourier Transformation, thanks to which power quality analyzers will be able to decompose signals into fundamental components and harmonics. We will see how to measure each harmonic and also two parameters that will help us to have a more general vision such as the THD or Total Harmonic Distortion and the TDD or Total Demand Distortion. We will use the EN50160 and IEEE519 standards to set limits to these parameters. Finally, we will see how to use the Fluke 435 SII analyzer to study harmonics.