Abstract
Energy-saving lamps are equipped with converters enabling high energy efficiency at the cost of injecting very distorted currents on the mains. The problem is more complex in the emerging smart-lighting scenario where these lamps are also used to perform additional tasks. Harmonics mitigation at the lamp level is expensive; consequently, an optimal lighting system design aiming at reducing both costs and current distortion of the whole lighting system is necessary. A tool able to emulate the current drawn from the lamps is necessary for optimal design. Such a tool has also to consider the fluctuations of the voltage on the mains that usually occur throughout the day. In this perspective, a parametric PSpice circuit is proposed and the netlist is reported in this work. Moreover, the simple procedure to be adopted for computing the parameters is also described. The validation has confirmed the ability of the proposed circuit in emulating the current drawn from various CFLs and LED lamps under different supplying voltage.
Highlights
Energy efficiency is a crucial target in view of a sustainable energy future [1], different policies to improve energy efficiency have been internationally introduced [2,3,4,5,6]
The parametric PSpice circuit proposed in this paper enables to consider power quality degradation at the planning stage of the lighting system and, overcome the aforesaid limitation of previous works on the optimal lighting design
When only capacitors are used for emulating the current harmonics, the voltage across Ck is imposed by the related loop (Figure 13): ( )=
Summary
Energy efficiency is a crucial target in view of a sustainable energy future [1], different policies to improve energy efficiency have been internationally introduced [2,3,4,5,6]. In the Smart Lighting scenario, intelligent lamps present new capabilities and functionality (e.g., continuously flashing to signal an intrusion, use sensors for automatic dimming, and so on) making them more than simple illumination systems [10] Such additional tasks involve driving algorithms for the converters that may intensify the harmonic distortion. The optimal lighting system design aiming at mitigation of the distorted current drawn from the whole lighting system requires a tool for estimating such a current when different lamps configurations are adopted (number, type, nominal parameter, and so on) In such a case the best configuration is the one with the greatest harmonic cancellation and lowest THD [25,26,27,28,29]. It is a useful tool for the optimal design of a new lighting system or its subsequent optimal retrofit
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