Search results

Filters

  • Journals
  • Authors
  • Keywords
  • Date
  • Type

Search results

Number of results: 3
items per page: 25 50 75
Sort by:
Download PDF Download RIS Download Bibtex

Abstract

Light sources and luminaires made in the LED technology are nowadays widely used in industry and at home. The use of these devices affects the operation of the power grid and energy efficiency. To estimate this impact, it is important to know the electrical parameters of light sources and luminaires, especially with the possibility of dimming. The article presents the results of measurements of electrical parameters as well as luminous flux of dimmable LED luminaires as a function of dimming and RMS supply voltage. On the basis of the performed measurements, a model of LED luminaire was developed for prediction of electrical parameters at set dimming values and RMS values of the supply voltage. The developed model of LED luminaire has 2 inputs and 26 outputs. This model is made based on 26 single models of electrical parameters, whose input signals are supply and control voltages. The linear regression method was used to develop the models. An example of the application of the developed model for the prediction of electrical parameters simulating the operation of an LED luminaire in an environment most similar to real working conditions is also presented.
Go to article

Authors and Affiliations

Roman Sikora
1
ORCID: ORCID
Przemysław Markiewicz
1
ORCID: ORCID
Paweł Rózga
1

  1. Institute of Electrical Power Engineering, Łódz University of Technology, 90-924 Lodz, Poland
Download PDF Download RIS Download Bibtex

Abstract

The development of technology and design of light management systems remains dynamic. Among all the benefits offered by these systems, the most valuable might definitely be the possibility of saving energy consumption. Knowing the value of energy savings is the key factor that users need to know before deciding to use a lighting management system (the type of light management system). For this purpose, it is useful to simulate the operation of the lighting control system, for example in the DIALux program. Such simulation helps evaluate potential savings in electricity consumption using the proposed lighting control system. In the DIALux program, it is possible to change the luminous flux value of luminaires. In such a case, it becomes possible to semi-simulate the light management system’s operation as we don’t receive actual information on reducing installed power of the lighting system during reduction of the luminous flux value of luminaires. This article shows what type of technical data are important to use for the DIALux program to properly and accurately simulate light management systems and to receive accurate data on energy saving. It also presents the results of photometrical and electric parameter measurements (Φ – luminous flux, P – power, PF – power factor, THDi – total harmonic distortion of current). The article discusses the power control characteristics obtained on the basis of these measurements and explores the source of differences between simulation of energy saving calculations and real measured energy savings. An existing lighting control system installed in an office reception area was used to compare calculations with the real value of energy consumption reduction. The impact of electronic power and control systems on electrical network parameters is also an important problem mentioned in this article. It also explores the effect of power regulation of LED luminaires and LED modules on the value of the power factor and total harmonic distortion (current) value (THDi).

Go to article

Authors and Affiliations

A. Wiśniewski
Download PDF Download RIS Download Bibtex

Abstract

More and more street lighting deployments use LED technology as a light source. Unfortunately, the new technology also brings some challenges with it that remain unnoticed until installed at scale. This article presents issues related to capacitive reactive power consumed by LED luminaires. The problem is even more profound if the luminaire is dimmed, because it consumes capacitive reactive power, which is very undesirable in the power system. Countermeasures in terms of reactive power compensation for a luminaire working with variable power and their effects are also presented. The article also contains the results of the harmonic analysis of the LED luminaires current for full power and dimmed operation.
Go to article

Bibliography

[1] M. Traverso, S. Donatello, H. Moons, R. Rodriguez Quintero, M. Gama Caldas, O. Wolf, P. Van Tichelen, V. Van Hoof and T. Geerken, “Revision of the EU green public procurement criteria for street lighting and traffic signals - preliminary report,” EU - scientific and technical research reports June 2017. DOI: 10.2760/479108.
[2] A. Manolescu and F. Sisak, “LED source, a comparative analysis on lighting efficiency,” 2016 International Conference and Exposition on Electrical and Power Engineering (EPE), Iasi, 2016, pp. 525-528, DOI: 10.1109/ICEPE.2016.7781395.
[3] D. Jenkins and A. Bhargava, “LED Lighting: Maximizing the Reliability, Safety, and Efficiency of Light Fixtures in Hazardous Environments,” in IEEE Industry Applications Magazine, vol. 21, no. 1, pp. 64-67, Jan.-Feb. 2015, DOI: 10.1109/MIAS.2014.2345829.
[4] L.T. Doulos, A. Tsangrassoulis, P.A. Kontaxis, A. Kontadakis and F.V. Topalis, “Harvesting daylight with LED or T5 fluorescent lamps? The role of dimming,” Energy and Buildings, vol. 140. pp. 336-347, April 2017 DOI: 10.1016/j.enbuild.2017.02.013.
[5] G. Gagliardi, M. Lupia, G. Cario, F. Tedesco, F. Cicchello Gaccio, F. Lo Scudo and A. Casavola, “Advanced Adaptive Street Lighting Systems for Smart Cities,” Smart Cities 2020, vol. 3, pp. 1495-1512, November 2020, DOI: 10.3390/smartcities3040071.
[6] B.A. Portnov, R. Saad and T. Trop, “Interactive Scenario-Based Assessment Approach of Urban Street Lighting and Its Application to Estimating Energy Saving Benefits,” Energies 14, no. 2: 378. DOI: 10.3390/en14020378.
[7] Ł. Kosicki and D. Typańska, “Badanie odkształceń prądów i napięć generowanych przez oprawy z diodami LED,” Poznan university of technology academic journals, Electrical Engineering 2017, 92, 215-226.
[8] A. Djuretic, V. Skerovic, N. Arsic and M. Kostic, “Luminous flux to input power ratio, power factor and harmonics when dimming high-pressure sodium and LED luminaires used in road lighting,” Lighting Research & Technology, 2019. 51(2), 304–323. DOI: 10.1177/1477153518777272.
[9] A. Djuretic and M. Kostic, “Actual energy savings when replacing high-pressure sodium with LED luminaires in street lighting,” Energy 2018, vol. 157, pp. 367–378. DOI: 10.1016/j.energy.2018.05.179
[10] T. Lerch, M. Rad and I. Wojnicki, "Selected power quality issues of LED street lighting," 2020 12th International Conference and Exhibition on Electrical Power Quality and Utilisation- (EPQU), Cracow, Poland, 2020, pp. 1-4, DOI: 10.1109/EPQU50182.2020.9220310.
[11] F. A. Karim, M. Ramdhani and E. Kurniawan, "Low pass filter installation for reducing harmonic current emissions from LED lamps based on EMC standard," 2016 International Conference on Control, Electronics, Renewable Energy and Communications (ICCEREC), Bandung, 2016, pp. 132-135, DOI: 10.1109/ICCEREC.2016.7814966.
[12] L. S. Czarnecki, "Considerations on the Reactive Power in Nonsinusoidal Situations," in IEEE Transactions on Instrumentation and Measurement, vol. IM-34, no. 3, pp. 399-404, Sept. 1985, DOI: 10.1109/TIM.1985.4315358.
[13] D. Vieira, R. A. Shayani and M. A. G. de Oliveira, "Reactive Power Billing Under Nonsinusoidal Conditions for Low-Voltage Systems," in IEEE Transactions on Instrumentation and Measurement, vol. 66, no. 8, pp. 2004-2011, Aug. 2017, DOI: 10.1109/TIM.2017.2673058.
[14] C.I. Budeanu, “Puissances reactives et fictives,” Instytut Romain de l'Energie, Bucharest, Romania. 1927.
[15] D. Jeltsema, "Budeanu's concept of reactive and distortion power revisited," 2015 International School on Nonsinusoidal Currents and Compensation (ISNCC), Lagow, 2015, pp. 1-6, DOI: 10.1109/ISNCC.2015.7174697.
[16] IEC 61000-3-2 – “Electromagnetic compatibility (EMC) – Part 3-2: Limits – Limits for harmonic current emissions (equipment input current ≤ 16 A per phase),” 2019
[17] R. Nawrowski, Z. Stein and M. Zielińska, “Analiza wpływu przekraczania dopuszczalnych wartości współczynnika mocy w sieci nn na pracę systemu elektroenergetycznego,” Poznan University of Technology Academic Journals, Electrical Engineering 2013, 74, 111-117.
[18] IEEE 519-1992 - IEEE “Recommended Practices and Requirements for Harmonic Control in Electrical Power Systems,” 1993.
[19] S. Ernst, L. Kotulski, T. Lerch, M. Rad, A. Sȩdziwy and I. Wojnicki “Calculating Reactive Power Compensation for Large-Scale Street Lighting”, Computational Science – ICCS 2020. Amsterdam, June 2020, vol 12138. DOI: 10.1007/978-3-030-50417-5_40.
Go to article

Authors and Affiliations

Tomasz Lerch
1
ORCID: ORCID
Michał Rad
1
ORCID: ORCID
Igor Wojnicki
1

  1. AGH University of Science and Technology, Krakow, Poland

This page uses 'cookies'. Learn more