Abstract
Among the non-linear loads used in household, Compact Fluorescent Lamps (CFLs) and LED lamps are becoming more widespread, while incandescent lamps are intended to be replaced by these types of lighting devices. LEDs and CFLs are significantly more efficient and economical than incandescent lamps, and are expected to be used in 100% of residential lighting in the future. As nonlinear loads, LEDs and CFLs produce highly distorted currents. A large number of customers using LEDs or CFLs for domestic, commercial and industrial lighting could determine important Power Quality problems. The paper reports experimental measurement results regarding Power Quality in indoor lighting systems. The harmonic absorptions of several types of luminaries are analyzed, highlighting the impact behavior of different lamps function of used luminaries’ technologies. The recorded harmonic absorption allows characterizing the harmonic spectrum variability of the investigated lamps.
Highlights
The Power Quality (PQ) in electrical systems is regulated by IEC and EN standards, used as reference by the utilities [1,2,3]
In order to comply with these technical standards, the utilities have to guarantee admissible voltage levels established by the standards, ensuring the supply continuity; the end-users have to guarantee current absorptions with adequate Power Factor (PF) and reduced harmonic current absorptions
From the analysis of the obtained results, it is possible to conclude that all LEDs and Compact Fluorescent Lamps (CFLs) generate harmonics due to the use of power electronic converter or ballast to drive them
Summary
The Power Quality (PQ) in electrical systems is regulated by IEC and EN standards, used as reference by the utilities [1,2,3]. Many studies about the PQ issues related to the lighting devices have been addressed to analyze these problems since the 90s [4,5,6,7] They generally estimate through simulations the mutual influence between loads and distribution grid [1,2,3,4,5,6,7]. The measurement of device’s harmonic absorption represents the preliminary step for the assessment of loads impact on the distribution grid Nowadays, this aspect is more important as the growing interest in energy saving determine the replacement of incandescent lamps with more efficient CFLs or LEDs [8,9,10].
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