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

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

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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, Washing Machine Decal 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 Cinnamon 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.