Computing Active Power Losses Using a Mathematical Model of a Regulated Street Luminaire

Roman Sikora, Przemysław Markiewicz and Wiesława Pabjańczyk
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Roman Sikora: Institute of Electrical Power Engineering, Lodz University of Technology, 90-924 Lodz, Poland
Przemysław Markiewicz: Institute of Electrical Power Engineering, Lodz University of Technology, 90-924 Lodz, Poland
Wiesława Pabjańczyk: Institute of Electrical Power Engineering, Lodz University of Technology, 90-924 Lodz, Poland

Energies, 2018, vol. 11, issue 6, 1-16

Abstract: Before the use of regulated street luminaires with variable power and luminous flux, computations were performed using constant values for their electrical and photometric parameters. At present, where such lighting is in use, it is no longer possible to base calculations on such assumptions. Computations of energy and power losses, for example, need to be performed for all dimming levels and based on the applied regulation algorithm. Based on measurements carried out on regulated luminaires, it was found that certain electrical parameters have a nonlinear dependence on the dimming level. Electrical parameters were also observed to depend on the value of the supply voltage. The results of the measurements are presented in this article. Failure to take account of power losses in computations of the energy efficiency of street lighting in accordance with the applicable EN 13201 standard causes values of energy efficiency indicators to be overstated. Power loss computations are presented in this article for a sample street lighting system with regulated luminaires, for the whole range of dimming levels and additionally for fluctuations of ±10% in the supply voltage. In addition, a mathematical model of a regulated luminaire is constructed with the use of regression methods, and a practical application of that model is described.

Keywords: road luminaire; linear regression; power losses (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2018
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