Abstract
Light-emitting diode (LED) lamp has been widely used in recent years for lighting systems due to its environmental friendliness, long life, low power consumption and high efficiency. However, LED lamps are sources of harmonic pollution due to AC/DC conversion by rectifier diodes which results in poor power quality. LED lamps research focuses on improving the power factor (PF) and reducing current harmonics.In this article, we present the study of the harmonics of the current generated by two Spot-type LED lamps of the same brand and of different power. We took the following harmonics measurement cases: 6 W and 12 W lamps, the two lamps in parallel, for the different lighting modes, we need to make measurements for the three lighting modes: white lighting, colored lighting and mixed lighting between white and colored. Then, the electromagnetic disturbances conducted in common mode and in differential mode, using the Line Impedance Stabilization Network (LISN), were determined.
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