Abstract
Today, electronic devices are used in all areas of human activities. However, these equipments generate a signal distortion of the electrical parameters of the voltage source that supplies these non-linear loads. When the level of distortion reaches a certain threshold value, it causes a premature deterioration of the electrical loads and even of the power supply devices (transformers, circuit breakers, etc.). So, it is important to control this variation. This chapter develops techniques or scenarios to understand the source of harmonics following several scenarios by combining linear and non-linear loads. In addition, this chapter will discuss methods of measuring harmonics using electrical analyzers.