Photometric Flicker of LED Luminaires According to Driver Type

Petrinska, Iva; Ivanov, Dilyan; Pavlov, Dimitar; Kassev, Kiril

doi:10.1109/siela49118.2020.9167078

Cited by 3 publications

(2 citation statements)

References 3 publications

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“…Presently, LED drives are mainly divided into two types: constant voltage and constant current [27][28][29][30][31]. An RC buck drive is a representative constant voltage drive.…”

Section: Resultsmentioning

confidence: 99%

Experimental Interharmonic Sensitivity Evaluation of LED Lamps Based on the Luminous Flux Flicker Model

Song

Zhu

et al. 2022

Energies

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LED lamps have gradually replaced other lighting sources and have become mainstream in the lighting industry. The research on interharmonic sensitivity affecting their lighting quality cannot be ignored. By deconstructing the lamp-eye-brain module in the International Electrotechnical Commission (IEC) flicker model, a luminous flux flicker model without the constraints of a specific light source was proposed. The test system and corresponding analysis method of the interharmonic-luminous flux transfer coefficient in the model were described in detail, and the accuracy of the test results of the system was verified via incandescent lamp heat balance model simulations. Based on the test results, the conversion method of the interharmonic ratio of LED lamps under the flicker limit based on the interharmonic-flicker limit curve of incandescent lamps was deduced. By testing and comparing the differences in interharmonic-flicker limit curves of different driving types of LED lamps, the experimental evaluation of their sensitivity was completed, and the reference for LED lamp selection, driver design, and compatibility standard formulation in different application scenarios was provided.

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“…Presently, LED drives are mainly divided into two types: constant voltage and constant current [27][28][29][30][31]. An RC buck drive is a representative constant voltage drive.…”

Section: Resultsmentioning

confidence: 99%

Experimental Interharmonic Sensitivity Evaluation of LED Lamps Based on the Luminous Flux Flicker Model

Song

Zhu

et al. 2022

Energies

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“…Incandescent and discharge light sources are the most sensitive to voltage fluctuations. However, research results from recent years show that LED lamps with builtin switching power supplies or supplied directly from the power grid are also sensitive to voltage fluctuations [9], which is also shown on the basis of a signal from a photodiode with a spectral sensitivity similar to that of the human eye [10,11]. Therefore, it is important to detect the voltage fluctuation [12][13][14], to locate voltage fluctuation sources [15] (e.g., by using histogram analysis for voltage fluctuation indices [16]; voltage fluctuation amplitude analysis [17]; kernel density estimation analysis for voltage fluctuation indices [18]; a multi-level perceptron neural network [19]; a Jacobian matrix for gradients of voltage amplitudes [20]; analysis of power of voltage fluctuations [21]; or analysis of active power changes [22]), and to eliminate disturbances caused by them [23].…”

Section: Introductionmentioning

confidence: 99%

Selective Identification and Localization of Voltage Fluctuation Sources in Power Grids

Kuwałek¹

2021

Energies

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The current study presents a novel approach to the selective identification and localization of voltage fluctuation sources in power grids, considering individual disturbing loads changing their state with a frequency of up to 150 Hz. The implementation of the proposed approach in the existing infrastructure of smart metering allows for the identification and localization of the individual sources of disturbances in real time. The proposed approach first performs the estimation of the modulation signal using a carrier signal estimator, which allows for a modulation signal with a frequency greater than the power frequency to be estimated. In the next step, the estimated modulating signal is decomposed into component signals associated with individual sources of voltage fluctuations using an enhanced empirical wavelet transform. In the last step, a statistical evaluation of the propagation of component signals with a comparable fundamental frequency is performed, which allows for the supply point of a particular disturbing load to be determined. The proposed approach is verified in numerical simulation studies using MATLAB/SIMULINK and in experimental studies carried out in a real low-voltage power grid. The research carried out shows that the proposed approach allows for the selective identification and localization of voltage fluctuation sources changing their state with a frequency of up to 150 Hz, unlike other methods currently used in practice.

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Practical Verification of Diagnostic Capabilities of Methods for the Recreation of Voltage Fluctuations

Kuwałek

2024

Electronics

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Voltage fluctuations are one of the most common problems in low-voltage networks. Very often, these disturbances cause damage to or the incorrect operation of electrical devices. Unfortunately, at present, the monitoring of these disturbances relies on short-term and long-term flicker indicators, which only assess the severity of one of the effects of voltage fluctuations. Another measure of voltage fluctuations that has greater diagnostic potential is voltage fluctuation indices, i.e., the amplitude and rate of voltage fluctuations. One advantage of these indices that has been highlighted in recent years is their potential ability to recreate voltage fluctuations using these indices. This article presents research results that allow for the verification of the potential of voltage fluctuation indices as a method for recreating voltage fluctuations. For verification purposes, various cases of voltage variation recorded in a modern low-voltage network are used. The analysis of the possibility of recreating voltage fluctuations from voltage fluctuation indices presented in this article, in association with previously carried out numerical simulation studies and experimental laboratory studies, constitutes a complementary whole and indicates further directions in voltage fluctuation research in terms of the electromagnetic compatibility of low-frequency conducted disturbances.

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Photometric Flicker of LED Luminaires According to Driver Type

Cited by 3 publications

References 3 publications

Experimental Interharmonic Sensitivity Evaluation of LED Lamps Based on the Luminous Flux Flicker Model

Experimental Interharmonic Sensitivity Evaluation of LED Lamps Based on the Luminous Flux Flicker Model

Selective Identification and Localization of Voltage Fluctuation Sources in Power Grids

Practical Verification of Diagnostic Capabilities of Methods for the Recreation of Voltage Fluctuations

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