LED lamp modelling for harmonic studies in distribution systems

Molina, Julio; Mesas, J. J.; Mesbahi, Nadhir; Sainz, L.

doi:10.1049/iet-gtd.2016.1696

Cited by 34 publications

(17 citation statements)

References 16 publications

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“…From this critique, the paper then provides a detailed analysis of the time-domain and frequency-domain modeling approaches with the objective of developing and evaluating models of the LF emissions of LED lamps suitable for use in large scale harmonic power flow analysis to assess harmonic distortion in distribution networks. This extends the preliminary research on TDMs [25] and FDMs [26] of LED lamps and fills a gap in existing literature by providing a complete set of models of the four different types of LED lamps suitable for use in harmonic penetration studies. In the analysis, the performance of the models is quantified using experimental data, numerical simulations, and statistical evaluation, providing an in-depth analysis of the ability of commonly applied model approaches to represent the LF emissions of different types of LED lamps.…”

Section: Introductionsupporting

confidence: 54%

“…starting from detailed TDMs). For example, a detailed emission assessment of a specific device requires experimental testing, while a statistical distortion assessment of several kinds of devices can be performed using FDMs evaluated numerically starting from the more straightforward parameterization of TDM parameters, e.g., [25].…”

Section: Frequency Domain Model Developmentmentioning

confidence: 99%

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Analysis of Approaches for Modeling the Low Frequency Emission of LED Lamps

et al. 2020

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Light emitting diode (LED) lamps are now an established lighting technology, which is becoming prevalent in all load sectors. However, LED lamps are non-linear electrical loads, and their impact on distribution system voltage quality must be evaluated. This paper provides a detailed analysis of time domain and frequency domain approaches for developing and evaluating models suitable for use in large scale steady-state harmonic power flow analysis of the low frequency (LF) emission of LED lamps. The considered approaches are illustrated using four general categories of LED lamps, which have been shown to cover the vast majority of LED lamps currently available on the market. The aim is an in-depth assessment of the ability of commonly applied models to represent the specific design characteristics of different categories of LED lamps. The accuracy of the models is quantitatively evaluated by means of laboratory tests, numerical simulations, and statistical analyses. This provides an example, for each LED lamp category, of comprehensive information about the overall accuracy that can be achieved in the general framework of large scale LF harmonic penetration studies, particularly in the assessment of voltage quality in low voltage networks and their future evolution.

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Section: Introductionsupporting

confidence: 54%

Section: Frequency Domain Model Developmentmentioning

confidence: 99%

Analysis of Approaches for Modeling the Low Frequency Emission of LED Lamps

et al. 2020

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“…Among the grid parameters affecting I c1,h and I c2,h , V p,h is a crucial parameter since it can change the conduction interval of diodes in Figure 1. Although the V p,h might nonlinearly affect I c1,h and I c2,h , it is assumed that these current harmonics are affected by V p,h linearly according to (2).…”

Section: Predicting Current Harmonics In An Active Distribution Networkmentioning

confidence: 99%

Modelling and prediction of current harmonics generated by power converters in distribution networks

Moradi

Yaghoobi

Alduraibi

et al. 2021

IET Generation Trans & Dist

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Predicting current harmonics in distribution networks is essential to find harmonic losses and power quality indices. In order to predict the current harmonics, the effect of grid impedance and voltage distortions on grid-connected power converters need to be considered. The effects of these parameters on current harmonics can be nonlinear, which complicates the system analysis. Consequently, this paper investigates the impacts of background voltage harmonics, grid impedance, and multi-parallel grid-connected converters on current harmonics at a point of common coupling. Moreover, a novel method called combined least squares and kriging (CLSK) is proposed to predict the current harmonics after evaluating the level of system nonlinearity. In the proposed CLSK method, the prediction model is developed by measured voltage and current harmonics at the point of common coupling to identify and predict the current harmonics. This analysis shows that using the proposed CLSK method, the accuracy of the current harmonic prediction is increased compared to the existing methods. The accuracy and the efficiency of the proposed CLSK method are verified by lab experimental results and field measurement data.

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“…As a result, a decrease in the power quality of power distribution as a large number of LED lamps are usually connected to the same bus, resulting in high current harmonic distortion fed into the power system. For this reason, the power quality resulting from using LED lamps in power distribution systems needs to be studied and analyzed [38][39][40][41][42][43][44][45]. In Molina et al's work [38], a frequency-domain low-watt LED lamp model for current harmonic distortion calculation, which is applied for large-scale harmonic penetration, is discussed.…”

Section: Literature Reviewmentioning

confidence: 99%

“…For this reason, the power quality resulting from using LED lamps in power distribution systems needs to be studied and analyzed [38][39][40][41][42][43][44][45]. In Molina et al's work [38], a frequency-domain low-watt LED lamp model for current harmonic distortion calculation, which is applied for large-scale harmonic penetration, is discussed. Blanco and Parra [39] analyzed the voltage and current harmonic distortion of distribution systems when supplying energy to LED lamps.…”

Section: Literature Reviewmentioning

confidence: 99%

Harmonics and Reduction of Energy Consumption in Lighting Systems by Using LED Lamps

2018

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This paper proposes the study and analysis of harmonics, energy consumption and power quality of light emitting diode (LED) lamps equipped in building lighting systems. LED lamps with external (LED MR16) and internal (LED light bulb) drivers are investigated using an experimental setup to compare the results. The power quality of both LED lamps is studied by using a power quality meter to measure the generated harmonic currents from various case studies. The case study is divided into four major cases: one LED lamp is turned on with one driver, two LED lamps are turned on using the two drivers, eight LED lamps are turned on with one driver, and eight LED lamps are turned on with the eight drivers. As harmonics are related to total power factor (PF), which affects the energy savings of the building, hence, a filtering circuit to reduce harmonic current has been designed and implemented to improve power quality and/or power factor of the system. The different cases of harmonic filter insertion at the input of an LED lamp’s driver are discussed and then compared with a lighting standard to show the effectiveness of the passive filtering technique used in the studied system. In addition, the obtained result can be applied to both newly built and retrofitted buildings that aim to use LED technology to increase energy efficiency and decrease energy costs, and could be a helpful guide for end-users and manufacturers in addressing and developing LED issues.

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LED lamp modelling for harmonic studies in distribution systems

Cited by 34 publications

References 16 publications

Analysis of Approaches for Modeling the Low Frequency Emission of LED Lamps

Analysis of Approaches for Modeling the Low Frequency Emission of LED Lamps

Modelling and prediction of current harmonics generated by power converters in distribution networks

Harmonics and Reduction of Energy Consumption in Lighting Systems by Using LED Lamps

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