Analysis of Electric Power Quantities of Road LED Luminaires under Sinusoidal and Non-Sinusoidal Conditions

Abstract

The paper presents the results of laboratory tests concerning the measurements of electrical parameters of road lighting luminaires. These measurements were focused on determining the dependence of the electrical parameters of the luminaires versus the changes of the RMS (Root Mean Square) value of the supply voltage and the level of disturbances in the supply voltage. The basic electrical parameters for light-emitting diode (LED) luminaires were analysed with the option of luminous flux adjustment if it existed. During the laboratory measurements, the luminaires were powered from the Agilent 6834B distorted voltage generator within the assumed acceptable range of the changes in the deformation level resulting from the applicable legal provisions for the reproduction of actual power supply conditions.

Study on the Power Quality of LED Street Luminaires

“…The power-on transient currents are generated by the capacitors used to perform the power factor correction. [16] The dependence of the electrical parameters of four LED luminaires (with nominal powers between 32 W and 104 W) on the power quality of the supply voltage is examined in [17]. The change in the RMS value of the supply voltage has the greatest impact on the reactive power value, affecting the value of the power factor.…”

Application of Matrix VFD for Power Factor Improvement in LED Lighting Sources Loaded Power Distribution Lines

“…The problems posed by modern LED light sources have been examined in previous publications [2,3]. The authors of [2] state that LED light sources generate leading reactive power.…”

“…The authors of the publication suggest stricter standardization of the power factor values of the converters used in LEDs. In [3], an analysis of other aspects of LED application is conducted, and LED current and voltage diagrams showing that LED light sources generate leading reactive power are given. The publication only presents experimental measurements and does not analyze the theoretical causes of leading reactive power generation.…”

Using identification method to modelling short term luminous flux depreciation of LED luminaire to reducing electricity consumption

“…The simplest way to improve the energy efficiency of lighting installations is to replace light sources or luminaires with energy-efficient ones by equipping them with a dimming function 2 . Light sources and luminaires made in LED technology are considered to be the best in terms of both energy efficiency and functionality [3][4][5][6][7][8][9][10][11][12][13] . They have both advantages and disadvantages.…”

“…The advantages of LED light sources are, among others, lower electricity consumption, high luminous efficacy, durability, low sensitivity to ambient temperature, and above all, simple regulation of the luminous flux. The disadvantages are the generation of harmonic currents to the mains, the emission of blue light, and the need for a cooling system (heat sink) which increases the weight of the luminaire [3][4][5][6][7][8][9][10][11][12][13] . The proper selection of the heat sink, and its thermal resistance, ensure appropriate thermal operating conditions for LEDs.…”